93 octane with 18lbs..

[walden3]

Can I run 110 octane just fine when I've got it tuned for 93? I am worried I don't have enough octane with 18lbs of boost, what are your guys' thoughts?

 

[04sleeper]

As long as the 110 you are using has the same Stoich as the 93 then you should be OK.

What is your set up?

 

[walden3]

It's an 04 mach 1 with a 03 cobra motor with aftermarket pistons/trans/built rear

Kenne Bell 2.4 Supercharger 3.5 upper pulley 2# lower
55# injectors
Kenne Bell boost a pump.
Dual Cobra fuel pumps
Kenne Bell boost a spark

 

[Mike@TF]

you dont need 110 for your setup unless your tunes that agressive..i run about 20lbs on 93 and my compression is 9:5:1 on my cobra...alot of 3.4 whipple guys ususally run 21lbs on pump so you are just fine.... no need for a boost a spark on your setup though...

 

[04sleeper]

I would have to agree somewhat. 18 psi I would say you are fine. Just don't get carried away with timing.

I wouldn't run 21 psi on 93 though. Even if you pull timing out your EGT's will be too high for my taste.