[Ozonkiller]

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

 

[The Mad Porter]

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.

 

[Ozonkiller]

Awesome, That's exactly what I needed to know.

Thanks,

Tom