LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Why so raspy/backfire? Vid inside

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Old 11-29-2009, 03:35 PM
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Default Why so raspy/backfire? Vid inside

http://www.youtube.com/watch?v=R4a4Slz2Pq4

Skip to halfway through, at about 30 seconds to hear the car, It's manifolds, deleted cat, and flomasters, and I have no idea why it's so raspy or backfires so much while driving down the road if you get on it...
KN intake is the only other performance mod that i know of..
Old 11-29-2009, 03:44 PM
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Originally Posted by Randal McSandal
http://www.youtube.com/watch?v=R4a4Slz2Pq4

Skip to halfway through, at about 30 seconds to hear the car, It's manifolds, deleted cat, and flomasters, and I have no idea why it's so raspy or backfires so much while driving down the road if you get on it...
KN intake is the only other performance mod that i know of..
That's what your setup sounded like on my car. Headers and deletion of the hollow cat will smooth it out a bit.
Old 11-29-2009, 03:45 PM
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I'm probably going to buy a cat and throw it up there. Did yours backfire a lot?
Old 11-29-2009, 03:47 PM
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I would say make a better video that is longer and get a friend to help so we can actually hear it backfire .. the rasp seems some what normal to me.
Old 11-29-2009, 03:51 PM
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well thats what a LT1 sounds like with stock manifolds, no cat and a flowmaster. They sound terrible that way. get some headers and a different muffler!
Old 11-29-2009, 03:51 PM
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I'll go for a drive and turn my camera on.. and post a vid tonight possibly
Old 11-29-2009, 03:51 PM
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I'm 17, and poor so I'm looking for used long tubes lol



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