Re: Back Pressure
Backpressure is a restriction but it's not a yes or no question. It all basically deals with exhaust gasses and exhaust diameter and exhaust flow. And there is differences between NA cars and cars with Forced induction like a turbo or supercharger. The goal with Turbo DSMs is to have good free flowing exhaust which will benifit the turbo. Sometimes you can go to big. It's said to not use anything less than 2.5" exhaust on a turbo car (or it's suggested), but that also changes with some of the differances in engies. That cubic inch crap which I won't get into cause I don't know.
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'16 Focus ST - Daily Duty
'93 mr2 - Track car in progress
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