what octane to use ?

[donZ]

what octane race gas, is good to use in our cars ?
at 20 to 23 psi boost ?

 

[Slow91z]

timing makes a difference to...I ran 110 oct. with 20 PSI and and a 26* chip, no problem.

 

[S2V6RACER]

That depends on how fast your car is. What is your buildup?

 

[donZ]

i ran 110 octane, and SOMETIMES, i get some knock.
i thought if i ran higher octane, i could get rid of the knock.
20 to 23 psi boost.
12.1 @114mph, jc race chip, ta49, blue tops, stock long block.

 

[Slow91z]

Well if it was me I'd try 112, then you'll know if it was the octane or something else.

 

[trbojo]

i'm under the impression that you should run what your chip is burned for. i think you can get knock from running too much octane/too rich, also.

 

[Ormand]

You can get knock from running too rich, but not from running too much octane. What you get from running too much octane is poor, from spending money on gas you don't really need. (Buying any gas will make you poor these days) But higher octane is insurance, I guess.