This may be a stupid question but can you run 100 octane racing fuel in a stock s2000?? I am not going to do it because of the price per gallon, but what would be the effects of running such a high octane gasoline?

 

Our car is optimized for 91 octane fuel. Anything higher will provide no benefit. However, if you got your car tuned to 100+ octane then there will be a benefit -- no idea how large though. Probably not that much without supporting mods

 

Without forced induction or higher compression if you are staying NA, using racing fuel makes no sense. It won't make any more power, but it will hurt your wallet.

 

Not the best $/horsepower ratio there. You cannot take advantage of advancing the timing with 100 octane on a stock S2000.

 

Thats what I meant its 4.95 a gallon here in the metro detroit area.

 

Why?

 

A bad way of putting it is this. If you cannot taste the difference between a 2 dollar cheeseburger and a 200 dollar cheeseburger, would you spend 200 bucks on the cheeseburger?

The same applies for our car. It cannot detect any difference between 91 octane and 100 octance, therefore it cannot use the advantages of 100 octane. The only reason for running a higher octane is usually running FI or a higher compression both yeilding more HP. Never heard of anyone tuning their car to run on race fuel without any big power mods to support this.

 

Why? Because you need a power adder such as forced induction (SC'er, Turbo, or Nitrous) so that you can actually take advantage of the higher octane fuel that is more resistant to detonation, hence you can run more boost or spray safely with the higher octane fuel that ends in having more power. With a stock S2K it isn't possible to do this.

 

i am running 100 octane gas and j's n1 ecu with the intake,header,testpipe,exhaust combo. ı didnt notice notice any problems.


Tolga

 

you should run 100 octane IF you have ultra high milage and LOTS of carbon deposits in the combustion chamber from driving like a grandma!