Power Valve Selection
72blu,
News flash for you! Millions of GM cars idled with high compression engines & cams with less than 200* @ 050 duration cams. You obviously have no idea about combustion at idle.
My GTO idled at 26* on the show room floor.. It did that using vac adv connected to manifold vacuum. See the link below from the 1967 manual.
As for 440s & 35* at idle? Been there & done that many times. Latest one idles with 42-44*, cannot remember the exact figure; 20* init + 22* added with man vac adv.
Bud, here is another news flash for you: as far as best idle timing is concerned it makes NO difference whether the carb has a PV...or metering rods.
72blu,
News flash for you! Millions of GM cars idled with high compression engines & cams with less than 200* @ 050 duration cams. You obviously have no idea about combustion at idle.
My GTO idled at 26* on the show room floor.. It did that using vac adv connected to manifold vacuum. See the link below from the 1967 manual.
As for 440s & 35* at idle? Been there & done that many times. Latest one idles with 42-44*, cannot remember the exact figure; 20* init + 22* added with man vac adv.
Bud, here is another news flash for you: as far as best idle timing is concerned it makes NO difference whether the carb has a PV...or metering rods.