Highflow cat
drives euro trash
Joined: Jun 2000
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I would think simply gutting your cat would be worse than just keeping it stock. It doesn't follow a smooth exhaust route, instead it creates turbulence in what was once the cat. I'd really like to see some dyno charts comparing stock, with a gutted cat, with a highflow cat, with a test pipe. Would be interested to see what yielded the best gains, and where exactly those gains were made on the torque curve.
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Originally posted by stockstang
He's OBD1 so he should'nt be throwing any codes. He's running a stock header to a hollowed out cat with 2 1/4 straight piping all the way back to a RSX Type S Muffler. He heeds something to resonate the sound before it exits. I've seen bolt in resonator chambers.
He's OBD1 so he should'nt be throwing any codes. He's running a stock header to a hollowed out cat with 2 1/4 straight piping all the way back to a RSX Type S Muffler. He heeds something to resonate the sound before it exits. I've seen bolt in resonator chambers.
-Keith
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Originally posted by Alan
I would think simply gutting your cat would be worse than just keeping it stock. It doesn't follow a smooth exhaust route, instead it creates turbulence in what was once the cat. I'd really like to see some dyno charts comparing stock, with a gutted cat, with a highflow cat, with a test pipe. Would be interested to see what yielded the best gains, and where exactly those gains were made on the torque curve.
I would think simply gutting your cat would be worse than just keeping it stock. It doesn't follow a smooth exhaust route, instead it creates turbulence in what was once the cat. I'd really like to see some dyno charts comparing stock, with a gutted cat, with a highflow cat, with a test pipe. Would be interested to see what yielded the best gains, and where exactly those gains were made on the torque curve.
Test pipe: best peak HP and decent TQ
High flow cat: best TQ and decent HP
Gutted cat: ok HP and ok TQ (nothing special)
Stock: just sucked all the way around
gutted did have some gains over stock... and with the high flow vs. test pipe that is really a "Pick your poision" kinda thing...
-Keith
Last edited by `92CXhatch; Aug 17, 2004 at 12:02 PM.
7M 2JZ bird in pear tree
Joined: May 2004
Posts: 8,532
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This is florida...as long as you arent a ricer you should be able to pull off a test pipe. If you run no cats, best idea is to check your A/F ratio and cats become pretty much useless anyways
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ASE: Brakes
Yea..that very well could have been the most retarded idea I've ever heard, but .. do it anyway. -TheShow50h
ASE: Brakes
Yea..that very well could have been the most retarded idea I've ever heard, but .. do it anyway. -TheShow50h
