Cedarberry

I've seen where boosted cars are tuned on different gas, E85 I guess producing the most pwr?

A car built with efi live, where it will switch tunes depending on fuel, is there a point were if built to the hilt for e85, you wouldn't be able to run 91 octane.

Thanks

jhopper408

I think in my opinion, that the higher the octain, the more power you'll have. Even if it was at a lower octain rating.

Cedarberry

Guess my question is hard to understand, thanks for checkin in

I'll try again, here on the western slope of Colorado we don't have E85 or 93 octane fuel readily available, so if I was to purchase a built/boosted car is there a point in the build that 91 octane fuel is not enough for the motor.

Thanks

jhopper408

What I should have said was, if you had it tuned at a lower octain level then you were to put a higher octain in it ,that it should produce more power. But with your situation I'm not sure. Sorry and good luck!

PEETYZ

Do you have meth?

91 isnt ideal but its not bad. I personally run Shell 93 with 50/50 water/meth. I havent really seen 91 in my area but I know its common in some areas.

Meth will help combat the lower 91 octane

Cedarberry

Thanks PEETYZ, I'm looking at purchasing a boosted/built Z, I just want to ensure that I'll be good with 91 octane. Car is tuned for E85 and will need a retune to run around here without having to hunt up fuel stops.

Big Jt

i run 87 here... and spray meth.. no issue what so ever

PEETYZ

No problem.

e85 is awesome but if you don't have it readily available then 91-93 with 50%-100% meth is about the closest thing you can do. Having a flex fuel sensor would be awesome but its a bit trickey in the C5.

Have it retuned on 91 and meth and call it a day If you do travel to another location and put 92 or 93 in it the tune should be just fine.

MVP'S ZO6

Always try and run the best gas you can. Just because you get away with something don't make it right

youngrigo

I run 91 and meth here in Cali

Big Jt

care to find out tonight??? your local now and cant hide 4 states away!!!

MVP'S ZO6

My car isn't here but yeah when I do bring it I'll be more than happy to put some bus lengths on that banana you call a corvette.

stevieturbo

Your title question and what you say here are different.

Of course if you built the setup around making the most from a high octane fuel....there will be circumstances where you cannot run high loads on 91.

But seeing as you arent giving any goals, expectations, details of what you propose for any build etc etc....then there is simply no answer to a question that isnt really being asked.

But certainly you could build an engine that will make lots of power quite safely even if you are limited to only 91 octane fuel.