Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Vacuum Vs. mechanical advance
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Old 11-02-2004, 11:09 AM
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killerformula killerformula is offline
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thats a lot of initial timing, but you might be ok with it. Are you getting run-on after you turn the car off, or is your starter turning slowly or getting kickback? Sounds like a carburetor problem. Pull your plugs and read them!

I'm assuming two things can be causing your problem:

In the carb your pump shot or transition circuit could be too agressive. A lean condition would be heard as a "pop" coming from the carb. Rich is usually a bog. A less agressive squirter or pump cam may be necessary.

You can also try to bring in your advance more quickly. Maybe run a couple of degrees less initial, but make the mechanical come in more quickly by changin the springs to a lighter set.

When does your mechanical start coming in, and when is it done?
K
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