Originally Posted by TJP
Originally Posted by Cab_Burge
[spoiler][/spoiler]Sounds like it might be the distributor trying to add timing at cruise RPM scope work twocents
I try to recurve all my distributors to get all the mechanical advance in by 1600 to 2000 RPM max up shruggy
Have you tried tuning the outboard carb idle fuel ratio with the idle fuel adjuster screws in the base plates? If not try gently closing them until fully seated and then back out from 1/3 to 1/2 turn out from fully, seated depending on what altitude you're at wrench up twocents
Six packs rule when they are tuned properly tuned wrench: scopeup


iagree




the vacuum can is adjustable with a 3/32 allen key inserted into the nipple end. have you tried adjusting that ?
you could have too much vacuum at cruise, causing an over advanced ignition curve.
beer