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What size allen wrench does it take to adjust the vacuum advance on a stock dizzy out of a "77 F150 with a factory 460.

I just want to take a few degrees out of the vacuum advance as it pings a bit with light to moderate throttle (about 10-12" vacuum). Full throttle is OK.

Also, which way do I turn the wrench to retard? Righty tighty?.....

Thanks in advance,

Tom
 

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What size allen wrench does it take to adjust the vacuum advance on a stock dizzy out of a "77 F150 with a factory 460.

I just want to take a few degrees out of the vacuum advance as it pings a bit with light to moderate throttle (about 10-12" vacuum). Full throttle is OK.

Also, which way do I turn the wrench to retard? Righty tighty?.....

Thanks in advance,

Tom
Typically you use a 1/8" allen wrench. CCW limits advance and decreases rate vs vacuum. Conversely CW increases adavance amount and increases rate vs amount of vacuum.




:D
 
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