Deceleration backfire

Tiny
DOC M
  • MEMBER
  • 1965 CHEVROLET CORVETTE
  • 6.2L
  • V8
  • 2WD
  • MANUAL
  • 21 MILES
I have a LS3 in the car listed above with the factory side exhaust. On deceleration the exhaust gases are igniting would a baffle insert stop this?
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Tuesday, July 7th, 2020 AT 9:55 AM

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Tiny
ASEMASTER6371
  • EXPERT
Good afternoon.

I would start by checking the timing. Timing that is retarded will backfire when slowing down.

https://www.2carpros.com/articles/engine-backfires-while-running

Make sure the point dwell is set to 30 degrees. Then remove the hose from the vacuum advance on the distributor and set to timing to 12 before top dead center. Then attach the vacuum line and the timing should go up even more.

A baffle will not stop the backfire. It will suppress it.

Roy
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Tuesday, July 7th, 2020 AT 10:37 AM

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