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Old 10-25-2020, 02:32 PM
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Timberline Timberline is offline
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Default LS3 sound like it’s popping popcorn

I have a new GM crate motor LS3 525 and the first time I started it the engine purred like a kitten. Two weeks later I finally get back to take the car for a test drive and it sounds like it is popping popcorn out the pass side tail pipe.

Clarification I didn’t get the car out of ten drive way. Rev it easy to 2000rpm let it go back to idle it pops several time. Slowly take the revs to 3000rpm slowly bring it back to idle it pops even when the revs are climbing.

Any ideas where to start looking?
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Jeff
66 Nova Sport Coupe
Detroit Speed equipped front and rear
LS3 525hp, t-56 6spd
Build in progress

Last edited by Timberline; 10-25-2020 at 02:37 PM.
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