Reply to "Vacuum"

Husker, I am also running the CompCasms 292H on my 351 cleveland. The very lowest that my Vacuum achieved was 5" at Idle. I have gone through the timing countless times. Checked and rechecked for Vacuum leaks. Taken apart the carb and carefully reassembled it. Went through all of the adjustments. NO changes! I don't know if your demon carb is similar to my Holley. Two things I have found: In my case the 'standard' power valve of 6.5", was open ALL the time at idle making for a very rich condition which makes the engine run poorly which makes low vacuum...Well you get the Idea. As of this writing am looking for a power valve with a rating of 3.5- 4.0. My ignition is a Mallory Unilite, Ive gone through it, except have not yet hooked it up to the Ossiliscope. The Vacuum advance was running of of straight Manifold Vacuum. Then I went on the internet and have found that Half run their Vac. Advance off of the 'Ported' Vacuum. I will be running more tests on the ported Vac. Have not gotten to it yet, because of the holidays. My intial timing has been at 12 Degrees BTDC...