The octane rating of gasoline is a measure of how much you can compress the gasoline before it ignites, not how “good” it is.

This compression of fuel mixture into the cylinder is the 'compression ratio', which can be 8.0:1, 9.5:1, 10.25:1, or whatever.

Engines that require higher octane gas actually need that higher priced gas because the engines compress the fuel more before it is ignited. If you put regular gas in a engine that requires premium, the gas will prematurely ignite when it’s being compressed and the engine will give you a knocking sound.

Higher octane fuel will allow you to run a higher compression ratio, or 'hotter' spark advance without premature ignition, which will of course increase your horsepower.

But this horsepower increase isn't caused by the fuel itself, but by other modifications that have been made to the engine, ignition, etc..

If you have an engine running a 8.5:1 compression ratio, producing "X" amount of horsepower when using 91 octane gas, don't expect a noticeable horsepower increase from doing nothing more than filling the tank with higher octane fuel.

 

Its a pipe dream in a VP drum. HAHA

I see this on every forum.

We need a VP rep on the forum to point out the facts.

 

Uh huh, y'all are just taking cheap shots cause I said I wouldn't say any more
My mind is already made up from personal experience-but here is some interesting read
http://www.vpracingfuels.com/page469...ection15613263


Realize first that octane is a measurement of a fuel’s ability to resist detonation—nothing more. The two types of machines used for testing octane—a Motor Octane machine and a Research Octane machine—were designed in the 1930s. They were designed to test for octane numbers from the 0-100 range, therefore, any number above 100 is an extrapolation.

That should make some of you freaks happy

 

You took the time to look up the facts. Now please take the time and read them. Then you will know why it did not make more hp.

 

I always use 99 octane..this comes in at over $8 UK gallon at a 1.60 exchange rate..

Regular 95 would work out at around $7.60 UK gallon..

 

Screaming - I like your sig picture better.

 

Mine loves the BP 93 available in my region,...... but it sure ain't afraid to punish me if I am far from home and need to put chit gas in it.


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agreed on the octane discussion. I rank this among other discussions like the red spark plug wires and splitfire spark plugs, or whatever the latest craze may be. With that being said, if you expect a performance gain and you really really want it to be there, it will be there....in your HEAD. Now, as with any mod I believe most folks on here will tell you to "do what makes you happy" and this is no different. After all, one thing is for sure.....the smell of the exhaust is AWESOME. Makes me feel like I am at the races! I have pumped 100 octane gas many times purely for the smell, but there just ain't no performance to get......plain and simple.

 

If your bike is tuned right for the fuel in your area, you will see no gain with high octane.

But it seems that the OP's bike is tuned for higher octane, so he will indeed see real gains (not "in-your-head" gains).
He has a Fuelmoto package, not tuned on a local dyno. Likely has too much WOT advance.

If I were to advance my bike until it pings on regular fuel, I too would gain from higher octanes.



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Octane may help a poorly tuned engine but nothing will give you the power of a tornado under your air filter though.........