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Old 05-15-2009, 11:55 AM   #2
ZombieWeinerDog
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Join Date: Oct 2008
Location: Sparta, MI
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Re: Lot's of popping and cracking on deceleration...

Quote:
Originally Posted by CutlassSMan View Post
I've got my '71 swb back on the road and I like everything except all the noise it makes when I'm decelerating.
I get a lot of cackling, popping and backfiring, especially going down a big hill.

Before I give you the set-up, I want to say, I didn't set this up.
It has:
350, Powerglide, 6-cylinder gears, hooker headers, single plane Weiand intake (high rise), Edelbrock carb (cfm unknown), glass packs and full length 2.5" exhuast.

Is it the glass-packs, the engine set-up or just the nature of the beast?

What would help? Turbo mufflers? Flowmaster mufflers? Crossover pipe?
could timing have anything to do with it? I've put a light on this thing, who knows where it's set at. I've not been really impressed with the carb either (it might just need a rebuild.)

Any feedback would help.
i would imagine its more the glasspacks. my flowmasters crack and pop a little during deceleration, but it sounds nice. i have the same setup, original 3 speed. mine does not alot at all though
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