F
Fred 86 GN
Guest
I know this is "all wrong" in many folks minds but...
How fast have you gone with the stock cat-back exhaust from the factory? I am wondering if it is a big restriction or not. The "propaganda" that has brainwashed all of us is that the stock pipes are too small and the cross-over muffler is terrible for flow. Any before and after dragstrip mph numbers to show that switching to an aftermarket cat-back system made a big difference?
The stock pipes are 2.25" in diameter. Two 2.25" pipes have 7.95sq.in. of area while the 2.5" diameter pipe feeding the turbo has only 4.91sq.in. of area and the 3" diameter THDP feeding the cat-back has only 7.07sq.in. of area. So...how can the dual 2.25" pipes be a restriction? Especially as the exhaust gases cool as they flow through them?
Thanks,
How fast have you gone with the stock cat-back exhaust from the factory? I am wondering if it is a big restriction or not. The "propaganda" that has brainwashed all of us is that the stock pipes are too small and the cross-over muffler is terrible for flow. Any before and after dragstrip mph numbers to show that switching to an aftermarket cat-back system made a big difference?
The stock pipes are 2.25" in diameter. Two 2.25" pipes have 7.95sq.in. of area while the 2.5" diameter pipe feeding the turbo has only 4.91sq.in. of area and the 3" diameter THDP feeding the cat-back has only 7.07sq.in. of area. So...how can the dual 2.25" pipes be a restriction? Especially as the exhaust gases cool as they flow through them?
Thanks,