[SOLVED] Guys thinking about running E85

[crazyfast_tsi]

My first tune with E85. I tried to bring down the rating of the 1600cc injectors by 30%. That would make 1600cc's into 1120cc's. But that setting made the car run way too rich. LTFT lo was max negative and STFT was hovering by -14 to -17%.

The global that worked great was -66%. This meant that I just downgraded the 1600's by around 80%. I think that will work with any injector that uses E85. Here is a table I've come up with that will help anyone who wants to use E85.

Base (Rough) tune on E85 - Just to get you started.

1600cc = -64% Global
1150cc = -51% Global
950cc = -40% Global
850cc = -34% Global
750cc = Not recommended. (Too small)

Here is some good info if you would like to run e85
http://forums.turbobricks.com/showthread.php?t=73061


Here is some more help with injector sizing with e85

I'm posting this because I keep seeing so many questions about running E85. "Will _____ size injectors allow me to run ______ turbo on E85?" Here is a guide that will answer all of your questions.

This guide takes the following into account.

1. All injectors flow exactly what they say they will. IE: 720cc injectors flow exactly 720cc.
2. All injectors flow exactly the same. IE: All injectors are perfectly matched (which is impossible in the real world)
3. Specific gravity of E85 is 0.79.
4. All calculations use a gasoline AFR of 12:1 - this equates to 8.05:1 in E85 #'s. Meaning - your wideband will read 12:1, but your actual AFR will be 8.05:1. Your wideband doesn't care what type of fuel you use, and will display numbers based on gasoline stohic (14.7:1).

With that in mind, on to the numbers.

390cc @ 100% IDC will support 21.80 lbs/min. Global Correction: +50.00%
390cc @ 80% IDC will support 17.44 lbs/min

450cc @ 100% IDC will support 25.15 lbs/min. Global Correction: +30.00%
450cc @ 80% IDC will support 20.12 lbs/min

550cc @ 100% IDC will support 30.74 lbs/min. Global Correction: +6.36%
550cc @ 80% IDC will support 24.59 lbs/min

580cc @ 100% IDC will support 32.42 lbs/min. Global Correction: +0.86%
580cc @ 80% IDC will support 25.94 lbs/min

650cc @ 100% IDC will support 36.33 lbs/min. Global Correction: -10.00%
650cc @ 80% IDC will support 29.07 lbs/min

660cc @ 100% IDC will support 36.89 lbs/min. Global Correction: -11.36%
660cc @ 80% IDC will support 29.51 lbs/min

680cc @ 100% IDC will support 38.01 lbs/min. Global Correction: -13.97%
680cc @ 80% IDC will support 30.41 lbs/min

720cc @ 100% IDC will support 40.24 lbs/min. Global Correction: -18.75%
720cc @ 80% IDC will support 32.20 lbs/min

750cc @ 100% IDC will support 41.92 lbs/min. Global Correction: -22.00%
750cc @ 80% IDC will support 33.54 lbs/min

780cc @ 100% IDC will support 43.60 lbs/min. Global Correction: -25.00%
780cc @ 80% IDC will support 34.88 lbs/min

850cc @ 100% IDC will support 47.51 lbs/min. Global Correction: -31.18%
850cc @ 80% IDC will support 38.01 lbs/min

880cc @ 100% IDC will support 49.19 lbs/min. Global Correction: -33.52%
880cc @ 80% IDC will support 39.35 lbs/min

950cc @ 100% IDC will support 53.10 lbs/min. Global Correction: -38..42%
950cc @ 80% IDC will support 42.48 lbs/min

1000cc @ 100% IDC will support 55.89 lbs/min. Global Correction: -41.50%
1000cc @ 80% IDC will support 44.72 lbs/min

1150cc @ 100% IDC will support 64.28 lbs/min. Global Correction: -49.13%
1150cc @ 80% IDC will support 51.42 lbs/min

1200cc @ 100% IDC will support 67.07 lbs/min. Global Correction: -51.25%
1200cc @ 80% IDC will support 53.66 lbs/min

1600cc @ 100% IDC will support 89.43 lbs/min. Global Correction: -63.44%
1600cc @ 80% IDC will support 71.55 lbs/min

1850cc @ 100% IDC will support 103.41 lbs/min. Global Correction: -68.38%
1850cc @ 80% IDC will support 82.72 lbs/min

This should get you started on e85

POst all your questions here!

[Mitsuboost30]

Good summary for those wanting to run... And great link packed with info :D

[Dapper_Dan]

I wish we had e85 around here...

[Mitsuboost30]

same here

[crazyfast_tsi]

I have lots more where that came from!