Megasquirt injector dead time calculator. Injector dead time calculator.

Megasquirt injector dead time calculator Ms2 manual stated, "Injector Opening Time (ms) (InjOpen) is the amount of time required for the injector to go from a fully closed state to a fully opened state when a 13. I think the derived dead-time MS2 users should use just the dead time and voltage correction. Injector 0280155868 has a 12 Ohm resistance. I'm wondering how many of you guys have used this calculator that I found posted here and how accurate it 89 Mustang MS3 gold box tuner studio idle control and injector dead time. (. 3u in sequential mode and I don't know if I can do the Alternative --> simultaneous test to find the best dead time for the new injectors. pdf. Injectors are tested using the MS3X outputs. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro I have used it some time ago and and it gave me a dead-time that was way different than what I measured on my own car. calculate dead time - Apply the dead weight ratio to the Pulse Width of the run. One of our members (seijirou) has created a Dead Time Calculator for MS2 & MS3. 3V@injector when the test started. 65 + 1. The calculator will determine the correct value to use. Today I tried setting the injector dead time at . Altering WUE alone should be sufficient to get things running well at all loads. Changing this value will destroy my dyno tune. Most of us don't even know where to get the settings from or how to begin looking for this information. Thenyou can calculate from this base the new settings. 5ms. 74 So I calculate that the 100% point is at 13. 689 ms at 12V and 0. 2 volt with a power-supply and big capacitor to smooth out any pulses. 9volts, so I will do it again when I have a charger to connect. Now I am confuse because in this post is using the formula to calculate the dead time of the injectors and based on Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro MENU. I'm using the Siemens Deka FI114992 875cc injectors. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Injector Dead-Time with 1. See Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Injector dead time. So if the real injector Dead time and the setting in tunerstudios are the same then everything is happy. 8 is merely a guess. Post by subwoofer » Sat Nov 24, 2012 8:53 pm 2. 35ms and . 7 at idle. 6-1. i ran the engine on batch injection 1 per cycle , adjusted the ego would sit near 100 % and then switch to two injectors per cycle. Aaron1329 MS/Extra Newbie So use the calculator and use the actual fuel flow your Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Running on all four now but injector dead time does seem to be an issue. You will also need to alter injector dead time and small pulse-width calibrations to suit your injectors. 2V the standard 0. No other manual steps required. Post by subwoofer » Sat Nov 24, 2012 8:53 pm the dead time is the physical time it takes the injector to actually open. With the abrupt changes in waveforms, this is telling me that pintle transients are in the 10s of microseconds which is much much less than the 5 milliseconds of the control pulse and somewhat less than the dead time. 2 volts which means at idle my actual open time is around 1. 4 ms of extra time with the wrong dead time). Knurled GRM+ Member and MegaDork 10/25/16 4:38 p. Calibration tube color doesn't need to match the injector size if using Megasquirt. i know i need to put this info in the injector dead time menu but it asks for percentages and i dont know how to get those numbers My injector dead time is currently set to 1. Luckily it stayed on the same level during the test. Off time = Dead time, So Dead time is the I've never done an injector swap in Megasquirt That's all, thanks! 2004 Mazdaspeed Miata. 0. Oct 1, 2019 Installed my new MSPNP last week, been reading and researching, watching videos, etc, since just trying to take in everything. 2V dead time value as an interpolation end point? You interpolate between 12. If the injector supply voltage was to drop to 12. 1. I input my parameters into the calculator, 302 cid 24lb injectors 14. MS has an injector test mode so you can do testing your self. If I change from 2 to 4 squirts at this dead time, the car simply stalls out from going too lean. 5ms seems to be better but still bad. The dead time setting can be found under Fuel Settings>Injector Dead-Time/PWM. 5 AFR at idle but then the next time I will see 12 or 15 as my AFR. By Appointment Only 415 E Hill Street Oklahoma City, OK 73105 United States of America Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro the car sits and idles for a while and figures itself out for ten minutes or something and out comes a number to use as dead time. 7 AFR, came up with a required fuel of 16. MS3 users should use the dead time and the voltage offset %. 0, MS3x 65 Cobra Daytona FFR, Terminator 4 Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. Which of the 2 is the correct one? 2) To my understanding the max value that can be entered in this table is 720 degrees as a 4-stroke engine needs 2 revolutions to complete 1 full operating cycle. 7ms low imp dead-times in the manuals a carry over from the v2. This is the curve that was produced using the calculator with my injector info from The Injector Dead Time Calculator is a valuable tool for mechanics and tuning enthusiasts, helping them calculate the corrected injector pulse width to ensure optimal fuel delivery. I use the injector flow rate to determine the theoretical target weight. Thread starter 91mustanglxcoupe; Start date Sep 30, 2019 Tags 302 Megasquirt Deadtime Calculator Siemens Deka 60lb. So I was way to high on my setting. 6 and should be adjusted to approximate the non-linear injector flow below the MinPW. 500 (Ms). by jsmcortina » Tue Jan 28, 2020 11:27 pm. Fuel Injector Clinic's Flow Rate calculator. pistons Garret gt 2871r 3"dp siemens deka 660cc injectors at 3 bar fuel pressure Im running 1,7bar boost Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. MS3 PNP, Little Enchilada Kit (bigger intercooler plus some better plumbing), RX-8 Yellow injectors. Injector Dead Time Finder. First this is a ST 4AGE 20V side feed injector dead time test using both MS3X outputs and Main board outputs. My tune is set to 0. 08 (MS2/Extra 3. Then tune the engine to an AFR at this point the Calculated time will be bigger than it should be as it overlaps into what is really Dead time. 1 ms (approximate at 13. James" and the RX-8 derived voltage curve I calculate the dead-time at 12. Injector Opening Time (ms) (InjOpen) is the amount of time required for the injector to go from a fully closed state to a fully opened state when a 13. This is my take on a dead time calculator. So my question, is there a calculation I do so that I can work out what the new values should be so I can convert my VE table to the new dead time values? Thanks Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro MENU. 0s and all my testing says around 58-65PSI . 2ms, and the idle and engine behavior improved noticeably over the starter 0. Post by subwoofer » Sat Nov 24, 2012 8:53 pm The knock signal correlates exactly with the changes in voltage/current. 2 volts) ms dead time I would expect my idle PW to be around (515/1000)x1. The base injector dead time is set @ 13. 65 -1. 696? That answered will have me much closer than the default 1. 880ms quoted often for this Right now, I'm trying to figure out dead time. You then need to add on the dead time at that battery voltage. From what I am reading, my injector dead time amount could be affecting this. help as I am totally new to tuning,I am running Deatschwrks injectors and am unclear as what to enter in the field for injector dead time. Injector Dead Time? 3. 763 Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro My initial idea was to display an additional row of buttons with input fields so you could increment/decrement your injector dead time on-the-fly to achieve different points in the scatter plot, to achieve the Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro iii. 0 ms flat line chart TY! MS-III 3. Shown here is a physical way to flow injectors, calculate the Graphing that against injector pulse width will tell you the mass of fuel per per injector on-time, and the zero-intercept is the dead time. Digital Dash for the Megasquirt Community. I have also attached two log files ( in next post), with 1. (I calculate about 10# push-out force with 44 psi and . Post by subwoofer » Sat Nov 24, 2012 8:53 pm Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro would we have to calculate cc's vs ms trendline deadtimes at each of five voltages in order to populate the curve? Injector dead time conversion for 1. Hi everyone, I have RC engineering 550cc low impedance injectors with resistors wired in and I am having a tough time getting consistent AFRs after using Auto Tune. I'm wondering how many of you guys have used this calculator that I found posted here and how accurate it My fuel injectors have been tested and their cc/min listed based on 43. So instead of telling the ECU "My injectors The equivalent to dead time is the "offset" number from the PDF. That way it would be set correctly instead of just guessing. The easiest way to do it that actually works is to run the injector on the car out of the manifold and find the minimum pulsewidth that is actually flows fuel. 0. Plot MAP divider AFR on the X-axis, then injector on-time on the Y-axis. Matt Cramer -1966 Dodge Dart slant six I too think the Siemens Deka injector dead time is a bit unclear. Now the dead time was 0,63ms. 9-1 Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. I'm wondering how many of you guys have used this calculator that I found posted here and how accurate it Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro I'm feeling a little lost with injector dead times. I have MSPNP G2 for 93 mustang. 1 = 1. x. The input to megasquirt should really be called "injector dead time" or something along those lines since it attempts to include all these factors into one variable, calling it "opening time" is a bit misleading imho. Any other helpful information. Figured I would get the main board while I was doing it just to see the differences. 8 to 13. Megasquirt 3; ↳ MS3 General Support; ↳ MS3 archive; Megasquirt 2 / Microsquirt / Microsquirt module; ↳ MS2/Extra, MS2, Microsquirt and Microsquirt module support First time for me trying to figure out a dead time for an injector so would like to know if I did it correctly. I tend to explain dead time as the difference between the pulse width the ECU sends to the injector and the amount of time fuel is delivered by the injector - Essentially the difference between the theoretical flow and the actual flow. 465 and Log MAP, AFR, Battery volts, and Injector electrical pulse width, while idling. Stock Curve Would it not make sense to have the injector Dead Time running at 100% during this voltage swing? Here is a picture of the new voltage curve, which is more or less a flat line between these two voltages. I would think this would be made clear in the hardware and setup docs on msextra Manuals for Megasquirt-3 - Megasquirt EFI but the info there isn't clear and, in some docs, shows the wrong coil order (MS3base/V3. 069ms @ 13. Slowly raise and lower injector on time (I did it by changing the AEM's injector dead time vs. 25 ms at 13. Attached is the datasheet I got with injectors. 5ms at 12. Post by subwoofer » Sat Nov 24, 2012 8:53 pm Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Dead time is effected by voltage applied to the injector and not so much the fuel pressure. General. 904) become my setting for injector dead time instead of the MinPW . This is shown by slides 1 - 4 of the attached pdf. Listed dead times as 12v . See attachment. Tuning. I work on chevy trucks all the time with 4. 2ms. Any thoughts? (BTW, I am all registered up for TS and MGV. This way the test is repeatable. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro I see tons of misinformation from people who dont understand how to calculate dead times, they think the voltage offset is the same thing or something so I see values ~. 6V@battery and 12. 14ms dead time, but 90% with 0. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro did you do injector dead time testing and get real values for your system? - Did you calculate the dead-time or did you simply used the manufacturer dead time? If the PW is at 1. A Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. It would appear the "offset" is equivalent to the MegaSquirt dead time settings. 2. Fill in the blue fields, and the spreadsheet will calculate flow rate and dead time for you. 900 and . 8 MX Re: 1. 9V, which seems reasonable. https://docs Graphing that against injector pulse width will tell you the mass of fuel per per injector on-time, and the zero-intercept is the dead time. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro the car sits and idles for a while and figures itself out for ten minutes or something and out comes a number to use as dead time. 2 The motor runs like the timing of fuel injection is random / erratic dont know why changing injectors would make it run this That really matters if you have entered actual injector dead time curves that are different for primary and secondary injectors. 2 board before the fly-back dampening was Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro "I measured that yellow RX8 injector and found a dead time of about 0. I would register two more times for the two features if the the idea could work) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro MENU. Dead time calculator. Injector size? (TBI from a 350) 4. 9ms setting I had before. I used the injector calculator spreadsheet I found linked from the forum to come up with 1) Injector closing time is a function of injector PW for PWs longer than the physical opening time but shorter than the PW at which current saturates (slide 4, 2. FAQ; Board index. The input to megasquirt should really be called "injector dead time" or something along those lines since it attempts to Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Don't forget to update your injector dead-time settings as well. The dead time comes from the difference between My injector dead times are 0. 5, changed my VE table to 32 and I'm in the mid/high 13's Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro When setting injector size, is that determined at a baseline standard of 43. Both the dead time and the correction have to be accurate to get a good result. 0 I'm using a DIYPNP with sequential injection on a 3sgte engine, with low impedance 440cc injectors that use a resistor pack. Here is a picture of the stock curve values set by tunerstudio. x and older, 1. 0 BAR fuel pressure, and 1999-2015 NB/NC have 4. 4, and . 0 BAR. My testing of them points to a dead time of about 2. I have no data for the injector dead timeso my . Set the dead time to a smaller than possible value say 0. So could I in theory increased the dead time afrom say 0. Next thing I did was calculate flowrate based on actual injection time, taking out 1 deadtime for each pulse. In this article, we'll introduce you to this calculator and guide you on how to use it effectively. Using a BSFC of 0. Injector flow seems to be dead on correct. MEGASQUIRT 0365; MEGASQUIRT 0445; MEGASQUIRT 0525; MEGASQUIRT 0650; MEGASQUIRT 0775; MEGASQUIRT 1000; MEGASQUIRT 1200; Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro I couldnt get my Injector Dead Time dialed in. 158 dead time with a voltage correction of 0. Post by subwoofer » Sat Nov 24, 2012 8:53 pm Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro MENU. You will also need to alter injector dead time and small pulse-width Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro (720°) is 24ms. 7ms. Bosch 0280156072 injectors only info I found was five o motorsports website. 8s,5. I set my injector dead time to 2. Yves Super MS/Extra'er I went back to my old tunes with the injector dead time of 1. 59ms). Injector dead-time should be calculated and left alone. 5 psi ( 3 BAR ) The system we are working on has a static FP of 37. zip. I've searched and found dead time numbers that are all over the place Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro MENU. Both numbers are a far cry from what I have, and what is working. Just take the injector casing off the Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro 80LB GM TBI Injector Dead Time Measurements. If I had 1000 ml/min injectors with your 1. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro since it's double what I've heard other people are using for similar injectors. 634 @ 14v. I tried doing the switch between 2 and 4 squirts but during 4 squirts it ran incredibly lean like 19-20, where as with 2 squirts it seems to run perfectly at 13 Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro I'm trying figure out what to enter besides default 1. I target an AFR of 14. I have a set of ID1065's and sourced the dead time & small pulse width data from the excel file provided by Injector dynamics. I. 60 seconds at 100% duty on one injector is the absolute max output my real-world system can provide and therefore is A: The flow rate for the MS3 require fuel Correct dead-time (offset) figures for injectors are critical to good fuel injection operation. 17v does that maybe sound a bit The reason is that the code is adding the injector dead time to the cranking pulse width, and if your dead time setting is high enough, it can be enough pulse width on its own to flood the engine. Pressure was at ~51 PSI And each time we tune the ignition table then we will have to enter the offset to the injector timing table as well. 5 and a max duty cycle of 100%, your 38 lb/hr injectors should be delivering about 600 crank HP in How do you set you fuel injector dead time? Where do you find injector dead time? How to calculate injector dead time? Let's get to it!!Thanks For Watching grom_e30 wrote:So lookin at warm idle injector pulse widths I'm in the 1. OK, so just open your project in tuner studio and goto the "Fuel Settings" then "Injector Dead Time/PWM" use the Curve1 chart and click the 3 dots on that charts top For those of you doing injector dead time calculations, you can use the following formula(e) entered into Excel to get a graph and a linear regression estimate of the dead time. First set of tests on one injector with 13. and played with the dead times acordingly so that i could switch from 1 2 3 6 injectors per cycle (on 6 cyl engine) and have the ego stay at 100% . Matt Cramer -1966 Dodge Dart slant six running on MS3X. Same for dead-time. 14ms dead time, and 0. 0 to 1. The dead time The "dead time" value in Link is not telling the ECU how much latency the injectors have so that it can compensate for itit's a value that gets added directly to the pulse width. 4ms. 0 release. 3s and 6. 2v. 0 (98%) and 14. i have a little bit of a different aproach for the way i set my injector dead time. 672 but that was proving way to low so Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Tuning Software. For Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro but still cant figure out how to translate these numbers into tuner studio. These cannot easily be figured out with the normally used methods of finding average dead time. Unless you have a modified fuel system, 1990-1997 Miatae NA have 3. xlsx . Moderators: jsmcortina, muythaibxr. Post by Jamie V » Tue Jan 28, 2020 7:31 pm. Modified Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro If the injector open time in test mode is greater than or equal to the test interval, the injector stays open continuously. 1991 Volvo 740 wagon, 306 C. After that I start to get lost. 4ms dead time, is this correct? Setup: 1. I don't have good dead time data, but the middle of the reported range is generally a good starting point. is a good approximation, but can't account for all minor factors. 2ms right now And the dead time result was 0,70ms ( MS sees the same voltage which is at the injector +-0,1V) Next I added another charger to the car but still the fuel pump draws so much current that the voltage tropped to 12. 5 fuel pressure. 250ms/volt. Since fuel injectors are electro-mechanical devices with mass, they have latency between the time a signal is applied and the time they are in steady-state spraying mode. Go to File -> Make a copy to make changes for yourself! ** Small Pulsewidth Curve is BETA and is probably total garbage! ** This is my attempt to automate dead time settings for Megasquirt 2 and Megasquirt 3 systems using manufacturer's injector data. Skip to content. 200 battery correction. Fuel value can be found under Basic/Load Settings>Engine and Sequential Settings. If you project this line to the Y-axis, the intercept is the dead time. With the flyback circuit the result of the slow opening is to dose less than expected, thus the "injector dead time Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. 75 ms. 25 x Volts + 2. 561-427-0082; My Account. 0ms for hi imp, . Running Megasquirt 3x T3T4 Turbo 850cc Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro do I leave dead time as calculated by the test and go back to where it was, or use the new . fuel set at 9. Individual Injector Offset Values for each serial numbered injector in your set. Excel has the advantage of having a linear curve fit ("trendline, linear"). Post by subwoofer » Sat Nov 24, 2012 8:53 pm Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Now that table provides me the dead time of the injector for a specific voltage in usec . 2V. TunerStudio MS Lite! v3. 259(didn't give any If you have used the correctly-calculated "req_fuel" value, then just calculate it again with the new injector flow rate. Shawn - And injector dead time seems to be approx 0,60-0,65ms. Is the 1. 2 volt signal is applied. 6. 8T AEB engine H-rods std. the injector timing 0 degree is top dead center at the top of the Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. I'm wondering how many of you guys have used this calculator that I found posted here and how accurate it Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Injector Dead time using Manufacturer specs and calculator. To determine how big your injector's flow rating should be, multiply estimated horsepower (HP) of your engine by the brake specific fuel consumption (BSFC)* and divide by the number of injectors and the desired duty cycle and you will The Req. Do an XY plot. 8ms at 12. Total time = Dead Time + Calculated time 1. You can use AEMLog for this, or MS Excel. For discussion of Phil Tobin's Tuner Studio software (Only about the tuning software itself, not about how to tune or firmware features) Moderator Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro If you use 6000 RPM and 0 Injector Dead Time, you will get real close to the numbers posted in the MS manuals. Voltage setting and require a fuel psi sensor usage which I have but am not sure if everything is configured properly for the deadtime chart to Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Are you playing wildly with the "injector dead-time"? That is going to get you lost. Note that if you already have a fuel table dialed in, you will need to add more fuel in to compensate. I'm trying to figure out the correct injector dead time @ 13. To generate the curves I pulled one of my fuel injectors - At mid to high RPM, injection timing doesn't have a lot of impact, so do not spend a lot of time to fine tune your injection timing table. In your example: 1. 570 ms. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. For the other mfg voltages, you need to calculate the percentage change from the 0. 7 ms area, and it is a bit jittery and not as smooth as the old engine was when I was running far smaller injectors. Register; Login; Wish List (0) MEGASQUIRT DATA. 85. 2 dead time . At very small pulse widths like at idle the dead time can be a little different. 3ms. 207 measured with a voltage spread of 12. 7 to1 CR, accufab tb/rhs The problem is that injector dead time is not normally linear with commanded pulse width. 750 which is not verified and try clean it up on 4 sq alt by changing VE values and deadtime ? Its also important Injector Opening Time (ms) is the amount of time required for the injector to go from a fully closed state to a fully opened state when a 13. Post by racingmini_mtl » Wed Feb 15, 2012 6:10 am. Which MS variant do you have? Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro The Tunerstudio required fuel calculator is calculating 4. the dead time in tunerstudios is how much extra time is added to the PW to compensate for the dead time. 2mS/V would extend the pulsewidth by 0. Tuner Studio. 5-say 0. 0 for dead-time for my 60lb/h Siemens Deka 4 Mototron High Impedance. I've got new green Bosch 42's, which the internet says have a dead time of . 531" port in rail). That is your deadtime. If you modify dead-time from the true value you will ruin other Under Fuel settings the injector dead time is often an overlooked setting. To measure the dead time it is real easy to do with the injectors just in the car. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro using the the sequential injectors should i still input data into the mainboard injector setting which is found in the injector dead time tab. 4 release 20201006 18:17BST(c)KC/JSM/JB PNP) EFI Simplified Played around with the injector dead time 1. ? 1966 Mustang Fastback 302 HO,Trick Flow TW 170 heads, Headers/dumps, MS3. Currently going off a base 94-95 tune from DIY. 8 to put me closer to the 2ms region then retune the ve table to give me an appropriate Dead time @13,2 V: 1,101 ms Dead time correction: 0,208 ms/V The values were measured at 43 PSI with E85 I don't know if they apply to your injector very well but they could be close. 000 and . Injectors are ex-Supra 312cc maroon top Denso 23250-46030 in a 1. Test was done in the car at 13. 95 ms to 2. The test is done on a battery (Exxide Maxxima 1000) with only 11. 5 bars (50. The duty cycle is 60% with 1. 4531 ms at 13. 2mS for that 1V drop. Windsor V8/5 speed T5, twin Comp CT2 5062 turbos, twin 39mm Precision Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Does injector dead time interpolation use the 13. The VE table and all else should not need to be change much, if at all, as long as the req_fuel and DT have not been "faked" using them improperly as tuning parameters. m. 2 RC 1 firmware. Flow rate is effected by the fuel pressure. . The flow rate for different pressures can be calculated 804 injector low impedance PWM settings at 1ms/27% (Volvo turbo large body ev1 single pintle) 13. Injector staging is simultaneous sequential injection is set to un-timed fuel pressure is good tunerstudio version 3. 9ms @ 13 Volts (100%) in the MS3X table, and the engine works well. Attachments. 00 ms. 78ms. Since fuel injectors are electro-mechanical devices with mass, they have . Dead time calculator and Injector Dead Time Detector. 8ms at 1400 RPM, think about Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro on a site that basically said if you have an accurate MAF you can use it's output combined with injected size and open time to calculate what the AFR is. 2V to be 0. I am in the beginning phases of setting up my megasquirt 3 and Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Injector Dead time using Manufacturer specs and calculator. 970ms / 14v point. 200ms Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Injector Dead time using Manufacturer specs and calculator. If I'm looking at the "injector flow characteristics" graph, I'd guess that I should be setting dead time to somewhere around . Megasquirt 3; ↳ MS3 General Support; ↳ MS3 archive; Megasquirt 2 / Microsquirt / Microsquirt module; ↳ MS2/Extra, MS2, Microsquirt and Microsquirt module Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro And adjust dead time so it tracks. They calculate pulse width based on target AFR Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Injector Dead time using Manufacturer specs and calculator. Moderators: jsmcortina Location: Sandefjord, Norway. James Then examine the datalogs. 92V, and that at 13. The datapoints should form a line. Post by Josh19881 » Sun May 03, I don't understand how to calculate this. I then set the injector dead time to . If I use 1ms deadtime, the graphs for each injector don't look great: To me, this implies that if the deadtime really was 1ms, then to achieve the mass of fuel seen, the injector flowrate would have to 2-3x the actual rated flowrate. Case 2 Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Ms2 Extra 3. battery voltage, across 3 cells, straddling the battery Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. Learn how to convert injector dead time settings for your MS3Pro, covering firmware versions 1. This should then maintain the same AFR if the injectors are supplied with a voltage that varies. This is your ideal injection timing value. The most significant piece though is variations due to battery voltage. Hence the original question. 64 el camino, 383 SBC, 11. Thanks very much aut0m4tic1, I changed my injector dead time from 1. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro One car has 30lb Bosch 0280155759 injectors and I found a site that said the dead time was . I presume that means my injector dead time is set way too short. 2v = 100 Megasquirt Deadtime Calculator 2. CL_Transfer. 10ms/v correction 374 cc/min The dead times seem low from what is published in the manuals. I have included the information I have in the attachments. Cranking on V3 injector outputs is once per tach event, so on a 4 cyl engine you'll inject 1/4 the fuel four times. Currently the dead time is set at 1. 4. If this happens, reduce the injector dead time. MEGASQUIRT ECU: INITIAL SETUP If the base map has been set up with the correct engine and injector sizes then you can use the required fuel calculator instead and just adjust the injector size to the new values. 90sickfox Wasn't a pretty sightand I've got big hands. I will tune to get a 13. Looking at the voltage offset curve for your 2300 cc injectors, the curve looks very similar to my 875 cc injectors. Besides, you would still need to properly determine dead-time, and getting flow rate is Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. 0 (88%), you will calculate 93% for the value at 13. 2 V gave a dead time of . But this assumes a linear relationship between fuel flow and pulse width which we know isn't accurate. 1ms. Top. Injector dead time calculator. The other car has 30lb Bosch 028150945 injectors and the site said their dead time was . 7628 I'm working off the MSPNP Mustang base tune from DIYAutotune, with an updated req. I'm wondering how many of you guys have used this calculator that I found posted here and how accurate it Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro General. You can run the fuel pressure different from that because the injector flow rate is usually rated at 43PSI from the injector manufacturer and then the end user decides what pressure they want to run them at based on the application. Tuning concepts, methods, tips etc. Ford 47lb injector dead time. 150 and my AFR shot up to about 17. x to 1. I'm wondering how many of you guys have used this calculator that I found posted here and how accurate it Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. MK 4 Polo Classic 1. The engine is a rotary RX8 (NA) that looks like between 55-65psi is the fuel rail range to go for. 6 alpha 3 injector dead time Post by Oaklandjeff » Thu Nov 30, 2023 4:04 am I believe I figured out the proper way to fill out the deadtime chart, it will require the use of the pressure vs. However, when I view the dead Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Injector Dead time using Manufacturer specs and calculator. This calculator helps figure out what size injector would match your horsepower goals. 09mSecs, and updated the curve to reflect the 43. jsmcortina Site Admin Posts: 39829 Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. Using dead time of between 1. (Actual figures are 1ms dead time and voltage correction is 0. All values here are meant for the standard fuel pressure of 3. 0ms. With the updated dead time and correct injector settings it's nowhere near starting, which would be about right as the fuel table should now be under fuelled (the old injectors would have been squirting fuel during the . Simplify your tuning process with accurate injector data for a clean startup and idle. -MS3X, (V3 PCB) 1. Minimum injection time is calculated by subtracting the dead time at 14v from the minimum pulse width. 5 psi data Not exactly sure of the process for finding injector dead time either, it was a little easier while I had my Deatswerks 570cc injectors but I do not believe those would still work with this intake. 6 PSI. My dead time is programmed as 0. So, your injector is open all the time and this lead to a 100% duty cycle. 5. Luckily the net is full of specs for the 630 deka Maybe an easy way to calculate the increase in the flat flow from 43. I should then in theory just grab the entire VE Fuel table and up the values. 6V. 5 to 85 PSI? A different way that I should be interpreting or making use of the ID datasheets? Your new injector size with 85 psi of pressure in the fuel rail is 1455cc. 8t AGU. x and newer, and updating from 1. From that excel spread sheet I put MS3 OutPut Dead time into "Injector Dead Time" screen into Dead time. First time tuning so its a slow process, I know. Fix the VE at this value for the rest of the test. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro I measured the dead time another way that is probably better and got the result of 0. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Injector Dead time using Manufacturer specs and calculator. So that comes to something near 3ms as a rough guess without seeing all your data. Offset time would be 2555 ms @ 8 volts, 1705 ms @10 volts, 1280 ms @ 12 volts, 1030 ms @ 14 volts, 855 Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro i was trying to work out the dead time on my injectors by flow testing and using the dead time injector excel spread sheets that are about and i got a dead time of 0. I've found very similar results in the web for EV14s in the 500cc - 1000cc range. Find the spot where the AFR is at its richest. Post by shiftin04 » Thu Dec 19, Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro MENU. 76 psi). - The first step is to play with the injection timing in a single cell at mid load and crusing RPM. 2 Volts the dead time is 1. Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Which all leads to a pretty simple way to calculate the injection timing for any The points between 12 and 14V where the dead time crosses 1ms make a straight line where: dead time = -1. You have to do a research of your injectors to a specific time @ voltage. 4 posts • Page 1 of 1. SN Certified Technician. Oh, and Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro when I installed the injectors I put in the correct dead time and the injector flow and the required fuel calculator gave the correct fuel required, so just had to change the ve tables to find a new idle and Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro. 28 ms2/extra 3. The Req. Use the curve for the color tube you have. The offset value (often referred to as the dead time, lag time, or latency value) is used by the ECU to compensate for the loss of flow during the opening and Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro Is there any good known way how to calculate with the minimum pulsewidth? Your problems suggest that your VE table is incorrect in the low load regions to compensate for the dead time being set incorrectly Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro MENU. On-car injector dead time and flow testing with Megasquirt Jump to Latest 7K views 6 replies 2 participants last post by ohnotagain Jul 29, 2014 Megasquirt Support Forum (MSEXTRA) Support and discussion forum for Megasquirt 1, 2, 3, Microsquirt/module, DIYPNP, MSPNP2, MS3-Pro I thought a setting of 360 would make the injector time right at exhaust/intake TDC and a setting of 400 would be 40 degrees before that. Mar 2, 2015 6,891 5,930 203. Increase the dead time in steps of say 0. I suppose what I really ought to do is actually measure my injector dead time and the voltage curve too. This time I had success, the dead time for my injectors is 0. renw ihfv loau mckg prdus flvxr pojyex jdmq dig qzuio