TT402LS1

iTrader: (5)

Im going to be running E-85 on my twin turbo 402. I dont want to boost it more than 16psi. (dont want to lift the heads) What would be a good CR? Is it a good idea to run a higher CR with the E-85, or should I keep it down where a pump gas engine would run? (93 octane)

This is a 95% street car. See sig for details.

Thanks - Ron

camarols1

iTrader: (17)

I have the same plan for my build.
If you will be running e85 forever then 10:1 would be fine, but if you plan on making big numbers and have the option of running pump 93, then maybe 9:1 or so.
Most builders run a little less compression on stroker builds like yours to keep cylinder pressure under control.
My goal is about 1k RWP at 20psi on the corn with L92's, 9:1 compression,
and a 238/242 610/610 115lsa cam
I set my static compression a little lower just in case I can't get ahold of E85
I can run another tune for pump 93 to get me home.
I really liked the E85 on my previous build, it is very easy to tune and
more forgiving in regards to detonation under power.
I think it will help me reach my power goals without excessive cylinder pressure and blown gaskets. Let's hope

TT402LS1

iTrader: (5)

Anyone else have any thoughts on this???

Ron

smokinHawk

iTrader: (48)

here is a thread a few months ago talking about it
https://ls1tech.com/forums/showthrea...&highlight=e85