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Bruce Lancaster · 09-25-2014, 12:20 PM

Take it apart first and see that there is a piston and spring in there! And, as noted above, if the innards are still there with no vac they are putting an anchor on your part throttle operation at least. Hook it back up to vac when checked out for innards, run the adjust screw all the way out BY HAND so you don't pop the do-dad spring seat off of the screw, then back in maybe a turn and a half. Usually with modern gas you want it backed way out like that. You want some drag from this as the brake disc can float radially without a slight drag, giving you slightly erratic timing.
While messing around, look at engine end of the distributor shaft..."68" or "11" stamped there?? Find it an 11 shaft and advance for slightly quicker and longer curve that will add a bit of response.

09-25-2014, 12:20 PM	#10
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: vacuum advance disabled Take it apart first and see that there is a piston and spring in there! And, as noted above, if the innards are still there with no vac they are putting an anchor on your part throttle operation at least. Hook it back up to vac when checked out for innards, run the adjust screw all the way out BY HAND so you don't pop the do-dad spring seat off of the screw, then back in maybe a turn and a half. Usually with modern gas you want it backed way out like that. You want some drag from this as the brake disc can float radially without a slight drag, giving you slightly erratic timing. While messing around, look at engine end of the distributor shaft..."68" or "11" stamped there?? Find it an 11 shaft and advance for slightly quicker and longer curve that will add a bit of response.