engine timing thunderbolt 5

[mrxitmt]

when slowly accelerating the engine bogs down and sometimes backfires ,
my question is ...
the timing cover has a single groove and no numbers and is supposed to be set at 8 degrees before T D C . Is the groove 8 degrees or is that T D C .

[mmwjr]

TDC, get a timing tape that is sized for the diameter of your balancer, try summit racing.

[speedysprocket]

Or a light that has an adjustable advance


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[jparsons121]

Don't forget to put the module in Base Timing Mode when setting the initial timing.