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1970 911t tuned but some issues
So, my 1970 911t has had the top end rebuilt with 85mm JE pistons with 9.5:1 CR.
The car has had the zeniths rebuilt and fitted at a local vintage porsche specialist. The car is now running way better than before but "pops" when you lift off the gas.
The jetting has not been changed but everything else has been done (timing, valves, plus, distributor cap etc).
Any ideas what causes the popping?
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