no cat no backfire? what cuases the backfire?
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Junior Member
Joined: Jan 2005
Posts: 38
Likes: 0
From: South bend,IN
Car: 1986 T/A
Engine: 5.0 carb
Transmission: 700-R
no cat no backfire? what cuases the backfire?
i have no cat on my car with a 2 1/2in cat back dynomax system and it doesnt backfire at all. would it pop if i moved up to a performace y pipe headers and a 3in cat back? im just trying to figure out what combos cause this so i can avoid it thanx
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iTrader: (1)
Joined: Feb 2000
Posts: 7,964
Likes: 4
From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
I have hooker shorties, custom y-pipe that y's behind the tranny, no cat, and a borla muffler and mine pops like crazy.
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Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
I think it might be different from engine to engine. I have 2055 headers, 3" y pipe, no cat, and an 80 series flowmaster muffler. I get no pop at all. Even if I rev it up in park/neutral.
Last edited by IROCThe5.7L; Oct 4, 2006 at 11:08 PM.
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