Non ethanol or not ??

44070dart said

Just bought a Dart with a 11.5 compression 440, 906 heads. Talking with the owner he said at the current distributor advance setting, I should use octane booster while using 93 octane. Street car for most part.

My question is about non ethanol fuel. Use it or don't ? ..also use octane boost with non ethanol or stick with 93 octane ? ........... car is a beast !

Click to expand...

Can you even find non-eth pump fuel with the same octane rating?
When I 've been in areas where it is available, its been lower octane. I tried in my '85 wagon and on the long highway drive the engine pinged on moderate uphills. So there was a case where it did not work out.
You can try racing on Avgas or race fuels. Of course those are generally not sold for street use, so if you accidently still have some in the tank, don't advertise that. You may not get in big trouble but the sellers might.
Race fuels are available both with eth (oxygenated) and without. This may be where its worth discussing your engine with the a rep from the fuel company.