what octane race gas

[shorti28]

I am going to start running race gas. what octane and unleaded or leaded gas, what brand is best

[Keller]

Depends on what you need. Very hard question to answer.

Depends on how much boost, what your chip calls for, if you have a cat or not, etc.

There are several good brands of fuel. All may depend on what you can get in your area. VP, Sunoco, 76, Rockett, Torco, etc. There are unleaded and leaded varieties. If you are running a catalytic converter, you will have to run an unleaded.

Too high an octane, and it is too hard to burn. Plus it gets expen$ive. And leaded fuel also destroys O2 sensors.

Discuss with the maker of your chip. They may have some recommendations.

[shorti28]

thank you once again

[Vacuum 6]

I like 100 unleaded. Also you can mix race gas with pump gas.

5 gal 100
2 gal 93

[(5*100) + (2*93)] / 7 = 98 octane

[(number of gallons * octane) + (number of gallons * octane)] / total gallons = octane mixture