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JWN -> Nitro fuel needed for.......... (1/6/2003 8:50:19 PM)
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I personally know Don Nix and wouldn't disagree with him on anything fuel related, BUT, I do believe you are not looking at the whole picture. Yes, nitro releases oxygen which in turn makes the engine run as though it is lean unless you richen up the mixture. Thus, you are burning more fuel with higher percentage nitro then you would with low percentage nitro. More fuel = more power. This is why high compression engines do not respond as well to high nitro fuel. They do not have the head capacity to handle more fuel which can lead to either decreased power output, overheating or detonation.
As far as nitro making the engine start easier. I have never heard that, nor experienced that. Nitro will keep the engine warmer at idle which will help prevent the engine loading up quite as easily. It also, in my experience, will help the engine run SMOOTHER, then no nitro. If you are running engines which are typically a little high in compression, then this wouldn't apply to you or your engine. Those of us in the U.S., where nitro is considerably less expensive than other places in the world, typically have lower compression engines and therefore can enjoy the benefits of the added nitro content. OS engines are a prime example of this. Take any two OS engines and run them side by side with the exact same prop and glow plug. Run both on no nitro, followed by 10 or 15% and check the tach. The nitro fuel will turn more revs. BTW, test can also be tried on most other engines available in the U.S. aside from the majority of the European engines which usually have very high compression ratio which I covered in the beginning of this message.
John
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