[QUOTE=piper6909;604213]
Quote:
Originally Posted by blue62
You can argue that eventually you'll have diminishing returns, but when does more air in and more air out NOT result in increased performance?
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well lets look at one possibility: more air in and more air out creates more heat: more heat "possibly" could create ping or pre detonation. Picked up by the knock sensor when read by the ECU the ECU will retard timing to eliminate knock. retarded timing=.loss of power
or lets say you port and polish your intake: In theory increases flow (more air in more air out). but if you eliminate to much of the turbulence (make the runners to smooth).
Fuel particles drop out of the air: you have more air (and fuel) coming in and going out but your fuel air ratio is all messed up and you get a performance loss.
The OP stated that "IN ALL CASES" more air in and more air out increases performance.
I am not trying to start an argument.
I point out that the statement is not true because:
Many young people with limited automotive knowledge get their ideas on how to mod their cars from forums just like this one. They read a thread that says more air in and more air out "in all cases" increases performance.
So They run out and buy something like a high flow air filter for a ridiculous price.
Slap it on the engine and think they have increased performance.
When in most cases they have added intake noise and nothing else.
Except a fouled MAF sensor that causes the engine to run rich equaling a loss in power. and possibly over time a plugged up catalytic converter.
Yes in theory more air (and fuel) in and more air out build power. But it is not that simple. And it is not true "in all cases"