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> Running no cat
post Jan 7, 2004 - 11:28 PM
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Justin

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Tomorrow I'm going to get some custom exhaust pipe made for my celica. I was wondering how much louder it would be without cat. I am gonna have 2 1/4 in piping with no resonators and a muffler. Also, I heard that if you dont have a cat there will be a very noticable smell indicating you dont have one. Third, would it give me any hp gains since the midpipe would now be 2 1/4 Last, how easy would it be for a cop to tell that you dont have one. I live in alabama and we dont have to go through any emissions or vehicle inspections
 
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post Jan 8, 2004 - 2:13 PM
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Uppitycracker



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QUOTE (SpedToe169 @ Jan 8, 2004 - 7:44 AM)
Don't get rid of the cat, its irresponsible environmentally and won't gain you any power.

Exactly what I say when idiots talk to me about that as they call it the "cadillac Convertor" rolleyes.gif

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  Low backpressure and high exhaust stream velocity can be achieved by running straight-through free-flowing mufflers and small pipe diameters. The only two exceptions to this are turbocharged engines and engines optimized for large amounts of nitrous oxide. Both of these devices vastly increase the exhaust gas volume and simply need larger pipes to get rid of it all.


And this is why I dont understand these poeple putting 3" piping with headers on a stock engine, talk about killing your low end, and not improving your high end period, it just seems like it because you ****ed up the balance of your engine and emptied your wallet for no reason.

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