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Distributor issues

Solved one dist issue. Couldn,t stop engine pinging (pinking?) unless timing was set to about 5 deg ATDC with a SVDA dist. . Turns out dist was originally a dual vac type where vac can retards ignition at start and then relies on mech advance. At some stage the two hose retarding vacuum can has been replaced with a single hose vac advance type. So two lots of advance so preignition. One not solved is the ubiquitous 009 I,ve stuck in. If I adjust timing for about 28 deg BTDC total advance the initial static timing is ~ 5 ATDC. I thought 009 had a static timing around 7.5 BTDC?. That normal? Ta John

Reply to
John
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Not that I am aware of. For some stock distributors, sure.

But the 009 was never stock on an aircooled VW engine. So there is no stock timing spec.

Always time an 009 with the timing light to find maximum centrifugal advance. Static is only good enough to get it running so the timing light ccan be used.

Max

Reply to
Max

Reply to
John

Sounds like that should work. At least if I'm understanding you correctly. You might pull out the light and verify that it is set where you think it is while the engine is actually running.

I still prefer the timing light though. It also tells you something about the amount of timing scatter and also if the centrifugal advance mechanism is working properly.

Max

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Reply to
Max

Been playing and I think practical wise you are right. Pushing it fully advanced obviously gives you the maximum advance but I suspect that is more than what is delivered at 3500 rpm. The result is a more retarded ignition. As you say timing light is hard to argue with. Cheers John

I still prefer the timing light though. It also tells you something about the amount of timing scatter and also if the centrifugal advance mechanism is working properly.

Max

Reply to
John

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