The vac can in it doesnt leak, has 11R stamped on it, so 22* of vac, 20(ish) initial and Total mech of 37 at 5k(ish). So theoretically 59* ??
I have a spare vac with 8.5R stamped, so 17* crank gives 54* all in?
I dont think it's a vac advance issue as can holds vac and the distributor(and can) is same one for a few years now.
Would pickup in distributor cause this? I put distributor in vice and spun by hand with continuity tester and the beeps were good and regular.
I'm also thinking coil and/or ballast resistor combo? I'm unsure of factory specs for coil/ballast
Thanks, gonna have to invest in a Gopro soon lol
try running a GOOD vac advance canister . My 273 commando had the same problem of it breaking up badly when rpms came up.. I switched the vac can and it ran beautiful.