Quote:
Originally Posted by VetteVet
What you have posted is correct except that the OP did not indicate whether he has an HEI distributor or the stock points system. The vacuum advance is designed for full manifold vacuum at idle. The diaphragms are different between the two and the normal hookup for the points distributor is at a tee on the rear of the manifold behind the carb. IT shares a connection with the brake booster and the trans vacuum modulator.
It appears from the picture that he does have an HEI distributor, if so then my post is for informational purposes only.
There are tuners that recommend using full manifold vacuum in all cases and claim better performance. I can not substantiate that so I will defer to the experts.
|
Did not look at the HEI. Of course I was thinking along stock not modified.
I would expect that the full vacuum at idle would be in conjunction with all the smog controls and equipment that would be installed on the engine that the HEI would have originally been removed from.
Since the engine looks to be more like a non-smog era type, I would still run the vac advance to the ported vacuum so it would operate as a stock type distributer would.