Ok, I've read back through a pile of posts and modified settings without being able to solve my problem.  Please don't beat me for being stupid on this.  For some reason I have the hardest time with carbs and timing (2 essential parts of a car).

Relevent specs: 312, modified b intake, 1" phelonic spacer, Demon Jr Carb, MSD dist. (connected to ported vacuum), MSD ignition, MSD adj. timing control, PCV valve connected to carb

So here I go:  I have a hesitation with the car when the vacuum drops below 12, it clears up at about 6-7 (which I would assume is the power valve opening).  Speed doesn't matter, gear doesn't matter, RPM doesn't matter.  Always the same thing.  Accel hard, Accel soft - either way it bogs in that range.  I'm pretty sure my damper has slipped so no good for timing.  I've checked TDC with 1 cyl and a screw driver.  Set timing using both vacuum and RPM.  I've got it set now at about 21 vacuum at 700 or so RPM.  Timing control allows me to adjust on the fly, so I've checked a wide range of settings w/ no change.  The only thing I'm not 100% on is the springs/bushings in the dist.  But I didn't have this problem before I slotted the intake and changed the carb from a street avenger, so assumed that the vacuum/mech curves were ok.

- John

John: Lake Forest, IL



'57 Fairlane 500 - Looking better every day.