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> Adjusting Distributor Vacuum advance retard, How do you do it?
porsche735
post Sep 9 2003, 10:01 PM
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So, we seem to have found the source of our blown pistons and ring lands! Our distributor (off a fresh rebuild I might add), does not have enough vacuum retard at WOT. Turns out we were way too far advanced (about 38-40 degrees) under load.
My question is, how do you adjust the vacuum unit? The advance and retard work when you pull a vacuum on them. However, I suspect that the adjustment screw is not adjusted properly. It is almost all the way out. Does anyone know how to get this speced right?

Thanks for your help,
Chris
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Posts in this topic
porsche735   Adjusting Distributor Vacuum advance retard   Sep 9 2003, 10:01 PM
Bleyseng   Shops used to have a machine that you could put th...   Sep 9 2003, 10:15 PM
porsche735   Yes, mine was tested, but the machines only test t...   Sep 9 2003, 10:19 PM
Bleyseng   According to the stuff I have read, the vacuum adv...   Sep 9 2003, 10:24 PM
porsche735   The problem is I have an adjustable vacuum caniste...   Sep 9 2003, 10:31 PM
Bleyseng   Both my dizzys have the adjustable vacuum canister...   Sep 9 2003, 10:37 PM
porsche735   Actually, the advance is for emissions... http://w...   Sep 9 2003, 10:46 PM
Brad Roberts   I cant focus on this right now. I wish they would ...   Sep 9 2003, 10:49 PM
porsche735   We can turn it into a "How many threads are you sh...   Sep 9 2003, 11:04 PM
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