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Originally Posted by freddys
2 things i wanna ask
why are the air fuel mixtures the same
and why is there a increase in power but no major change in air-fuel ratio
im not dusputing the power gain
just wondering thats all
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The increase in power would be due to a greater mass of air entering the cylinders at a given engine speed. Air-fuel ratio would only need to change to change fuel burning characteristics, ie flame-front velocity, exhaust gas mix, etc.
In fact, the air-fuel ratio on the dyno chart is more constant over the RPM range tested with the G&D CAI than with the previous intake design which richens out past the peak power RPM, so the burning efficiency at high RPM may be better, and certainly will be more tunable with an edit. This also shows that the engine may be given a more radical cam without CAI restriction limiting the engines breathing capacity.