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Old 05-02-2004, 09:43 PM
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How do I know? timing advance question.

i have a 305 in my el camino with some performace mods done to it but i have a stock hei distributer from a 86 305 2 barrel engine. from what i have read, hei dristributer's advance curves are set for best performance for emissions. i would like to get one of those performance advance kits and an adjustable vacuum advance canister. my question is, from all of the weights and springs that come in the kits, how do i know when i have used the right ones for my application? seat of my pants feeling? is there a common set of weights every one seems to use from these kits on their sbc?


any input would be much appreciated, thanks in "advance". lol

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Last edited by Super Chevy; 05-02-2004 at 10:00 PM.
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Old 05-02-2004, 10:07 PM
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I would use the springs they give you but not the weights.
My experience with those aftermarket weight kits is they must be making them from melted down beer cans.
After about 10000 miles probably way less the weights wear out.
Theyre ok for a track type car but just didnt hold up to everyday driving.

Back then I had access to a distributor machine but a person could use a tach and timing light too.
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Old 05-02-2004, 10:36 PM
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If your using a HEI from a 86 model without a computer you`ve found your problem. the 81 and up HEI`s had no advance via mechanical weights and springs, the computer controlled the timing. Unless your distributor was converted to the older type then it has no mechanical advance. I`ve only seen computer controlled HEI`s with vacuum and mechanical advance in one instance and that was in a 82 silverado pickup.
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Old 05-03-2004, 06:44 AM
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this distributor has mechanical advance, this truck was not computer controlled. i have already changed the springs in it, so i know for sure that it has mechanical advance.
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Old 05-03-2004, 08:13 AM
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Read the instructions,

Troy
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