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There is a little more power in that it is noticeable that I do not push the gas pedal down as far as normal to go a certain speed. But you are also taking away power by forcing the alternator to work harder.
As for detonation, I have very little knowledge on that. I have never had that happen to me on a stock car. I can say that the fuel is more completely burned and that the motor is cooler. Those two things cause me to think that there is less chance for detonation.
I have been wanting to get out to an autox so that I can test accurately, but I have not been able to get out of the lab.
Now when running on Hydrogen alone, there is less power if nothing else is changed. It is difficult to load the cylinder with a gaseous fuel, much easier with a liquid. Gasoline takes up about 4% of the combustion chamber, whereas Hydrogen will need about 20% of the space. To offset that, Hydrogen is more easily compressed, so it is normal to increase the compression ratio or simply add a turbo to get the same effect. Also too with Hydrogen, there is no carbon to build up. It's very clean.
I'm building now a 40 plate unit and my goal is to hit 50 mpg. We will see.
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