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Author
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Topic: cats / performance???
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ADMS5OH
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Member # 1060
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posted
 
 
what effect do catalytic converters have on performance? I have read that removing cats on a near-stock engine will result in a loss of torque but what about a mildly modified engine with longtubes?
Is smog the only deciding factor?
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'89 GT
Posts: 104 | From: East Bay | Registered: Mar 2002
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Quick 88LX
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Member # 1950
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posted
No matter what a cat will restrict exhaust flow. If you can swap shorty h-pipes every 2 years, which is NOT hard, then you will be fine.
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"Men are Made, Not Born"
Car Picture : http://www.angelfire.com/theforce/quick88lx/
Original Member #495. Can I get my number back?
Posts: 1785 | From: Fairfield, CA/Okinawa, Japan | Registered: Oct 2002
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JoeT
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Member # 298
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posted
I think on a stock motor cats are stealing about 5 HP (assuming they are in good condition).
Plugged cats can be quite the performance detriment!
as far as torque goes, I think that's a bunch of crap. I don't see torque gains from having corks in your exhaust.
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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Stimson
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Member # 51
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posted
quote:
Originally posted by Quick 88LX:
If you can swap shorty h-pipes every 2 years, which is NOT hard, then you will be fine.
Swapping H pipes every 2 years isn't so bad, but swapping long tubes off and on in a 72 hour period was kinda a pain in the ass ![[Smile]](smile.gif) Two years from now, I'm going to try and sneak the long tubes through the system.
Posts: 2373 | Registered: Jun 2000
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