Cracking exhaust sound !
Thread Starter
Junior Member
Joined: Jul 1999
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From: Milford, NH U S A
Cracking exhaust sound !
Hi Guys,
I wanted to know if anyone could help me figure out how I'm getting a cracking exhaust sound in my 89 IROC L98? I just installed a set of 1 3/4" SLP headers and Y pipe with a new Random Tech Cat. Now I get this cracking sound out of my exhaust. Any suggestions?
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Bob R
(ROCN-Z)
89 IROC L98
I wanted to know if anyone could help me figure out how I'm getting a cracking exhaust sound in my 89 IROC L98? I just installed a set of 1 3/4" SLP headers and Y pipe with a new Random Tech Cat. Now I get this cracking sound out of my exhaust. Any suggestions?
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Bob R
(ROCN-Z)
89 IROC L98
Senior Member
Joined: Jul 1999
Posts: 849
Likes: 1
Ever had headers on a car before?
If not, the cracking sound is probably just due to the thinwall construction of the header tubes, versus the thickwall of a cast iron manifold.
With headers, you can literally hear the cylinder firing and exhaust coming out. Kinda 'tinny' or crackling sound.
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FORMULA 350 TK
Southern California 3rd Generation F-Body Organization©
If not, the cracking sound is probably just due to the thinwall construction of the header tubes, versus the thickwall of a cast iron manifold.
With headers, you can literally hear the cylinder firing and exhaust coming out. Kinda 'tinny' or crackling sound.
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FORMULA 350 TK
Southern California 3rd Generation F-Body Organization©
Thread Starter
Junior Member
Joined: Jul 1999
Posts: 15
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From: Milford, NH U S A
The sound is Great and there is a known difference in performance. I also have a Gale Banks Power pack system, cat back with all 3" stuff.........Works for me !
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Bob R
(ROCN-Z)
89 IROC L98
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Bob R
(ROCN-Z)
89 IROC L98
Junior Member
Joined: Jul 2000
Posts: 6
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From: Pittsburgh, PA
My car made the same noise when I put the SLP Headers and Y-pipe on the car (84 Z-28 w/355).
The noise went away when I put the SLP Cat-back on. In fact the car sounded completely different when I put the cat-back on, it ran and sounded better.
-Well I just read your last post, sorry I got a little ahead of myself. How long has the exhaust been on the car? Maybe it needs to "blow out"(I don't know the exact term) the muffler. My muffler sounded better after a few hundred miles.
[This message has been edited by alsz28 (edited September 18, 2000).]
The noise went away when I put the SLP Cat-back on. In fact the car sounded completely different when I put the cat-back on, it ran and sounded better.
-Well I just read your last post, sorry I got a little ahead of myself. How long has the exhaust been on the car? Maybe it needs to "blow out"(I don't know the exact term) the muffler. My muffler sounded better after a few hundred miles.
[This message has been edited by alsz28 (edited September 18, 2000).]
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Joined: Sep 2000
Posts: 184
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From: Thousand Oaks CA USA
Car: 91 Z28
Engine: 5.7
Transmission: T-5
mine does the same thing i just put some hooker headers on in jan - mine only does it when i lay on the gas a little although. I think my prob is I have a 3 inch y pipe and then a 3 inch high flow cat and it goes into a 2 1/4 inch pipe before entering the muffler
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