Just wondering if some one has information, or preferrebly a schematic of the timing curve for a stock HEI, Hei distributor is out of a 1978, it is installed in a 1966 Chevelle 396SS.
Any help would be much appreciated.
The curve will depend on the weights and springs, but the total centrifugal advance should be about 20 degrees. Vacuum advance will usually add about another 20. Static timing would be around 8-10 BTDC stock, but most can be advanced to about 14-16 without pinging.
Where gunna go get a good advance timing gun and make a graph of the curve ourselves...they had the initial set at 8 degrees... we tuned in the A/F
last night on the dyno, there is defently some more to be gained with some timing...