? about cats
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On Probation
Joined: Nov 2005
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Car: 2002 Formula
Engine: 5.7 LS1
? about cats
When I purchased my car guy said he couldnt get any power till he installed the cat. He had taken it off when he put the new system on. Is this statement true? Just wondering.
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From: Carson, CA
Car: '88 GTA, 90 Formula
Engine: 5.7 TPI, fed growth hormones
Transmission: 700r4 4u2?
Axle/Gears: 9bolt
That sounds strange to me. With a modern cat, he shouldn't gain or loose more than 2 hp max with it in or out.
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
So the guy said with the cat off, the car was slow right? Then he must have been driving it with an open y pipe. It probably felt slower, but it wasnt.
Last edited by IROCThe5.7L; Jan 29, 2006 at 12:30 PM.
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From: Pensacola, FL
Car: 1999 Saturn SL2
Engine: 4 cylinder
Transmission: 4-speed automatic
Running open headers changes the tuned length of the exhaust, which usually moves the power band up a couple hundred RPMs. The power is still there, the engine just has to wind up more to get there.
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