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Old 08-06-2021, 04:13 PM
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MOTORHEAD MOTORHEAD is offline
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Join Date: Feb 2001
Location: BRADENTON, FL
Cobra Make, Engine: KIRKHAM 427 S/C, SHELBY 427 ALUM. STROKER
Posts: 1,327
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No exh manifold leaks.
Balance good at idle, will ck at higher rpm.
Plugs all clean,almost too clean, but last run was only 10 mi.
Never had this problem with the single holley, got to be related to the weber set-up.
Let off on the gas pedal and it backfires, then push in the clutch and it instantly stops backfireing
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