E85 is good stuff

 

I just switched over to E85 a couple months ago. Picked up massive amounts of response, and power. .25~.3 tenths at same 12psi. Just put it back on gas tonight to head back to Ca and it's a pooch again

 

You can but to get it right you have to mess with the VE too. I left my stoitch at 14.7 and added to the VE table; didn't like how it ran using the stoitch method. There are places between 40 and 75KPA that I added 50% to get the response I wanted... You just have to watch the bubble on the histrogram where it feels flat; the WB isn't quick enough to pick it up.

 

^^^ Good stuff, thats what I'm talking about! Does the same PE/WOT principles apply as with gas?

 

I have a station a few miles from my house and put a 60/40 mix of 87/e85 sometimes..Its around $1 cheaper a gallon and I may have Justin tune for a permanent swap...My cr is higher than stock with the ls1/prc 5.3 heads so I run on premium anyways

 

coming out of the hole on 30 degree's of timing on e vs 14-17 on 91octane. HUGE difference.

i will advise that if you run e85 to switch back to pump for a couple tanks every 3-6 months. just to clean the system out.

setting the stoich to 9.675 isn't necessary. 99% of the time you will never hit that mixture unless you mix it yourself. average for e85 out of the pump is 10.4-10.8 stoich mixture. something else to, leaving the stoich at factory 14.69 is leaving a lot of power left on the table.

 

Area47 is right on about the E85 mixture. I personally have tested the actual ethanol percentage in the "E85" at several stations in my area and it has never actually been 85% ethanol, it's always been right around 70% which ends up with a stoich value of about 10.7.

As far as the whole thing about adding to the airflow tables (VE/MAF) to get the fueling right on E85 I could not disagree with more and is not a very good tuning practice. If the tune was dialed in correctly on just gas then just a change in the stoich table should be all that is needed and should have everything right in line with what it was. For example if the the VE and or MAF tables were tuned based on poor or incorrect injector data before then this is where the problems start.

 

Im curious if i could run e85 on my 4.8 with about 10 lbs of boost with 60's?
Anybody doin this?

Im not sure if i have enough injector fit it

 

E85 is excellent for boost or nitrous applications.

You want a fuel system that can support an AFR in the 10.2 range with E85.

 

So, if idle and cruise is 10.7:1 A/F ratio...WOT is roughly 9.1:1?

Also, how's your mpg....down with more fuel being put into the engine but how bad?