My thirdgen iroc is going in for tuning at the end of the month of april for tuning. My question is, can my car be tuned to run on pump gas and e85 gas? My current setup is a lsx376 crate motor with Cold Air Intake, longtubes, stock 42lb injectors, stock ls3 intake, a1000 fuel regulator, and a 340lph fuel pump. I believe I am using hp tuners and the car has a 411 ecm.

 

No stoich for E85 is like 9.8 and gasoline is 14.7. What you could do is get a dual flash PCM from Frost and switch back and forth between the two tunes.

 

Actually, yes! The 411 PCM has provisions for a flex fuel sensor. Just wire it into your PCM. I just asked the same thing and was given tables and this info. I was told that the dual flash PCM is un needed in your case.

Ps why did you tell him something that isn't true when you didnt know yourself?

 

https://ls1tech.com/forums/pcm-diagn...e-mod-ecu.html

 

I thought stoich was 8.9 to 1, maybe you got the numbers backwards.

That sounds great, It seems like e85 is so much cheaper out here in california than regular pump gas. It is 2.79 for e85 and 4.30 for 91.

 

Yea you run about 30% more but it usually makes sense money wise and if your tune is right there can be about 5% increase in power. Instant 15-25 horses!