Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Vacuum advance not needed?
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Old 04-05-2013, 09:24 PM
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The reason they don't want the vac advance used is because it is a generic tune and will need specific dialing in to match your motor and car-truck . Plus they have no control over what fuel you will fill the tank with.

Its up to you to dial it in. May want to replace with a fully tunable vac adv.

Some allow up to 20+deg at high vacuum basicly for EGR equiped engines.
Too much for a non egr engine... limit it to a max of 12-15deg at highest vacuum.
The rate has to be found by drive testing.
The mechanical cent advance set up is pretty generic too. Can also benefit from fine tuning too.
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