which octane could i get away with

[o0Quicksilver0o]

if i plan on running 5.5psi could i get away with 89 oct with out turbo knock?

[Neutrino]

Originally Posted by o0Quicksilver0o

if i plan on running 5.5psi could i get away with 89 oct with out turbo knock?

i presume you mean Knock as in detonation since i never heard or turbo knock

but anyway it depends on what compression ration you have and your timing....however its is generally considered a good ideea on FI engines to use the highest octane posible

[o0Quicksilver0o]

will predentonation hurt anything... so i can test it out and see what i could get away with?

[hybrid180]

Is it really worth the possible trouble with using lower octane so you can save 1-2 dollars per fill up? Just use the highest octane you can buy so you won't have to worry about a thing.

[Tranzlogic]

i agree, if your going to bother with a turbo, just go with premium gas... its like buying a convertable and never puttting the top down..it just doesnt make any sence

[Polygon]

Be smart and don't put anything lower than 91 octane in a turbo-charged car. It isn't worth the money you saved on gas when you have to replace a cracked piston.

[o0Quicksilver0o]

aight well after i blow a good 3k on it i think every dollar counts but pistons arent free either ...thanks