Quote:
Originally Posted by Joey Soul
How does this not affect power? Does it have the same total inside area?
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Over the entire length of exhaust pipe, you're only losing a few hp from the pipes themselves. So excluding the mufflers, excluding the cats. Just the round pipes themselves. And thats on roughly a 10 foot length.
That crushed area is what ... 4, maybe 6 inches in length? So no more than about 5% of the total length. Now, its still fairly close to the same overall area. Maybe it increases restriction in that one little section by 20%.
To make the math simple, lets say there was maybe 10 hp lost along the total length of pipe from the engine to the tips. 1 hp/foot. This little 6 inch section, if it were full diameter, would then be robbing you of a whole 1/2 a horsepower. But since its flattened on the one side making it a bit more restrictive its now like 0.6 hp. A difference of 0.1 hp from a 'perfect' pipe. Oh wait, there's two parallel sides ... so its total for the system of 0.2 hp. Give or take. You're not going to notice that tiny of a difference on a dyno, let alone out in the world.
I'm just guestimating my numbers here. But even if I'm way off, its still hard to get it to work out to more than about 1 hp extra compared to a perfect pair of pipes.