Why does engine idle rough when vacuum advance is hooked up? Sep 23, 1. Messages: Likes Received: 0. Sep 23, 2. Messages: 2, Likes Received: 5. You need to dial in the carb better.
Quick Tech: Why You Still Need Vacuum Advance
Hook up vacuum advance, timing retards appreciably | For B Bodies Only Classic Mopar Forum
A metered vacuum signal is created in the carburetor and sent to the distributor at partial throttle. This results in improved efficiency of the engine. At highway speeds, with this additional advance in timing, the engine requires less pedal travel to run at the same speed. This results in better mileage. As the pedal is cycled down more toward wide open throttle, this vacuum signal is dropped out so as to not create too much total advance, which would result in pinging and detonation. An additional benefit of running this type of distributor is at slow speeds.
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Why does engine idle rough when vacuum advance is hooked up?
Is this a better way to go with a street engine? What kind of timing should I be running and should I disconnect the vacuum advance? First, on a street-driven engine there is no good reason to lock out your ignition timing.
Hook up vacuum lines edelbrock carb. Or is single solution, which port? Which port directly behind the factory tech no vacuum advance and meet a port on where you don't use in the new.