DOes race gas 100 octane, boost performance with nitrous? I know it helps SC and turbo but never help anything about nitrous.

-Tim

 

I use 115 unleaded all the time with nitrous but not to boost performance as much as reduce the chances of detonation.

 

Jime dont forget to mention that you use a stand alone fuel system when running nitrous.

 

is it safe to use 93 with spray?

 

Yes.
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so it doesn't increase performance?

 

Nope. It helps keep the engine safe.

 

It keeps the engine safe and increases performance.

Courtesy HowStuffWorks.com

The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.

The compression ratio of your engine determines the octane rating of the gas you must use in the car. One way to increase the horsepower of an engine of a given displacement is to increase its compression ratio. So a "high-performance engine" has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight -- that is what makes the engine "high performance." The disadvantage is that the gasoline for your engine costs more.

For more info, go to www.howstuffworks.com and look up octane

 

The bottom line here is that its the higher compression, advanced timing etc that brings the high performance or more HP the fuel just helps to prevent the detonation at those levels of performance.

 

After doing more research, I came across this:

Octane is a rating of a fuels resistance to ignite. The higher the octane, the harder it is to get to ignite. A higher octane may be necessary to prevent pre-ignition and detonation in a high performance engine. Higher octane fuel will generally burn slightly slower than a lower octane fuel which could require a change in ignition timing. Using more octane than you need will not help power, the slower burn rate will actually cause you to lose some power.

I stand corrected