Carb Question about Very High Air Flow on Synchrometer Options

[Craigers17]

Recently I tried installing my new 123 Disty, and, so far, I haven't had success. I ended up putting my old disty back in, and I've got it running again, but it won't hold idle. I put my sychrometer on each stack and they are all reading around 20, which is way high.

Normally, if I have the carbs dialed in correctly, my air flow meter usually reads somewhere from around 5.5 to 7 or so. I've never seen the synchrometer register any where near that high....much less on both carbs. The car did sit non-running for about 6 weeks, so the only thing that immediately comes to mind is that the jets all need cleaning. I'm gonna address that over the weekend, but wondered if anyone here had any ideas as to what might cause the air flow reading to be so high? I only had the car at about 1500 RPM when I took the readings. The carbs are dual 40's, with 28's, and neither the venturis nor any jet sizes or settings have changed in the last 8 months or so.

Any suggestions in pointing me in the right direction would be appreciated. Thanks.

[VaccaRabite]

Is the car idling at 1500 or are you opening the throttle to keep it going ? At 1500 your snail is going to show you really pulling.

Also, your snail has a metering valve that may have changed. If the valve is more open, the register will be lower. If the valve is more closed the range will be higher. The base moves and exposes a hole below the hard plastic part of the snail.

Zach