I was wondering if it is safe to run a 100 octane fuel in our cars (SS/SC) or will it actually hurt the car?

 

I don't think you will see any type of performance gains unless you tune for it. You might actually lose power from it.

 

ok thanks. I have not done it yet but I was just wondering???

 

Unless you have the stage 3 PCM or you are tuned for 100 octane you will not see any gains. You will probably lose power from having too high of an octane fuel in the car.

 

the octane rating of fuel is the fuels resistance to igniting. a higher octane fuel is harder to ignite. with low grade fuels in a boosted engine you can get detonaton because the fuel is to easy to ignite and it end up igniting from heat in the combustion chamber, not from the spark itself. this is why premium fuel must be run in our cars, it resists detonation better. now if you are not seeing any knock retard with your current tune, there is no reason to go with higher octane fuel, as the engine has a harder time burning it. because of this you could lose power.

about the only time to run 100 octane in our cars is a) tune for it, or b) running a stage 3 pcm. if you do run it, make sure its unleaded, as leaded fuel will foul your o2 sensors and clog the cat.

 

I have not run it but was just wondering thanks for the info. I will just stick with the 93 octane.