2.25in vs 2.5in vs 3.0in diameter
#1
2.25in vs 2.5in vs 3.0in diameter
i was looking around for exhausts and i noticed that that the magnaflow Ti and the HKS are the only one's in 60mm (about 2.25 in) piping.the rest of the exhaust ar 80mm (3in)piping.now i was wondering it what would be best; buy something with 80mm piping and lose some low end torque, buy a 60mm piping set up,or get custom 2.5 in piping.i don't know if im planning to go turbo or not so ir some one could help me out,keeping that in mind.thanks
#2
I wouldn't do 2.25 in, to small for me. 2.5" is great for N/A cars...and ok for Turbo cars. 3" Is kinda ok for N/A cars, and great for turbo cars.
The choice is yours, and yours alone. What would I do If I were you? 3" All the way
The choice is yours, and yours alone. What would I do If I were you? 3" All the way
#3
Same here man, well, since im buying a sr20det, yeah i would want the 3 inch. Just buy a good exhaust that is usable in both applications, maybe 2.5? just in case you change your mind and go turbo. That way you dont have to buy another exhaust.
#4
Since you're undecided on the turbo thing, stick with 2.5" and a decent muffler... down the line if you do decide to go turbo, changing the piping to 3" should only cost you about $60-80 for a custom mandrel bent setup to replace the 2.5" piping you'd already have
#5
It has been proven with dyno numbers that 3" exhaust on a NA 240 gives you gains in horsepower. I saw this on a thread in zilvia or 240sxforums. I tried to find it but couldn't. Anyways, the dyno showed around 10 more horsepower in the higher rpm's than stock. Makes sense considering the KA has a larger displacement than most imports on the road. High displacement=more fuel and air being used=more exhaust trying to escape. It would be loud as hell but worth it if you're planning on doing a swap anyway.
#10
yeah... it all depends... what are you doing to your car? if you plan on turbo just go with 3"... I mean, it give you gains anyways, and you wouldn't have to change it in the future like they said ^.... 2.5" would be a nice little gain, and probably won't be as loud... but they're are always silencers if you don't like it... personally I went with 3" all the way, but I plan on turbo... but I did notice a difference with it along with intake.
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