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Thread: 5MGTE Guide with Microsquirt
08-14-2015, 04:49 PM #11
MS3pro has blended maps I think normal MS3 might as well.
I think how it is done on most megasquirt v2 or microsquirt setups is via percent fuel and spark in degrees
Flex fuel sensor works in a range of 50hz to 150hz and the ECU will know what percent ethanol the fuel is based on that frequency
So say if you wanted to run pump gas on the E85 tune you can tell it to multiply the fuel by say .70 and pull 5 degrees of timing depending on the hz reading.
If you had a pump gas tune and wanted to run e85 you can have it multiple the fuel table by 1.30 and add 5 degrees
It normally would work off a curve not simple one of the other like above. Most E85 is not actually 85% ethanol it normally between 70 and 85%
Normal gas now is 10% ethanol which it needs to know that as well as the hz wont be 50 it might be more like 59 or 65 for pump gas
These numbers are guesses for now because I have not installed the sensor. Once I get it working right Ill post up the settings I used
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08-16-2015, 08:21 AM #12
08-16-2015, 10:18 AM #13
I'm not familiar with turbo's, but appreciate all the work and documentation you did. Great job!Tom - 83 P-Type, 5 spd, Terra Cotta, 110K, Chicago
15 Accord EX-L V6
97 528i, 110k..sold
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08-17-2015, 08:12 PM #14
Flex fuel setup
So this is how it works with a GM(Continental) sensor.
Stock GM sensor runs 50hz for pure gasoline(0%) and 150hz for pure ethanol(100%).
Fuel multiplier% multiplies the injector pulse width. This will increase the amount of fuel or decrease it based on ethanol percent.
Timing addition is how much timing is added or subtracted in degrees not percent. This is on a curve like the fuel Do not set both to negative my car started showing 80 degrees advanced
Baseline percent ethanol is whatever ethanol percent your fuel is on the tune. So for people running pump gas(e10) it will be around 10%. If the gas is pure set it to 0%
Mine was a reading 70% on the sensor so I set it at that. Most e85 is between 70% and 85% depending on season
It will say what your percent is when you set it up. You need to add the ethanol percent gauge to the dashboard in tunerstudio to see it.
Fallback settings are if the sensor fails it should be really rich with no timing addition to be safe.
As far as reducing boost based on flex fuel input you can do that but I think it is a paid only with tunerstudio.
Or it might be a MS3Pro only feature as it is greyed out on my version. It could also be I need to set my boost control to advanced setup with PID settings.
Ill look more into that later. I plan on running e85 almost always. The flex fuel will just be so I can get home if I happen to run out of fuel somewhere.
10-10-2015, 11:02 AM #15
Love this build I'm in the process of getting my microsquirt ordered
Sent from my SM-N910T3 using Tapatalk85 mk2 5mge (gonna get that t in there!!)
11-28-2015, 09:41 AM #16
11-28-2015, 03:51 PM #17
12-01-2015, 03:03 PM #18
Dude this is fuckin awesome, bookmarked and will reference again in may-ish once I'm out of school for the year and have a job so I can finally slap my turbo on the 6M! The computer stuff was the main reason it's not already turboed but this will make that lot easier, thank you!
03-10-2016, 02:29 AM #19
Whoa, didn't realize OP was local... hello there, so when can I come check this bad boy out?
03-12-2016, 01:10 AM #20
- Join Date
- Apr 2009
great write up. i may have missed it, but what did you do or calculations did you run to figure out the base ignition table? Also, why microsquirt instead of the full ms2/ms3? I look forward to your response
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