snowmannn
Junior Member
Hi, I know that if you put on race/aftermarket exhausts you eventually need a fuel remap/PCIII in order to get the appropriate fuel/air mixture in the engine. Do you know why this is so? Using a sporty air filter like K&N makes more sense because more air enters the combustion chambers but what does the race exhaust do to affect the burning process?
I can only think of lower pressure in the exhausts because they are "open" but what would that change inside the engine ?
Thanks!
I can only think of lower pressure in the exhausts because they are "open" but what would that change inside the engine ?
Thanks!