Brand new engine with about an hour of total run time on it, it is a mildly bored 351W which should be a 357 now. Bottom line it runs like crap (to the point of dying) below 1,000 RPM, I'd call it rough between 1,200 and 1,500, and only smooths out at 1,600 and above.
I know my cam is to blame to a large degree. I fully intended to have a much higher than stock idle speed, but not like this, I can live with 1,000-1,200. Cam specs are
I have about a 10.5:1 compression, Edelbrock performer RPM heads and same (dual plane) intake, a single Holley 750 single with vac secondaries, and a 2,800RPM TC.
I suspect the timing is very close to being "perfect", I say that based upon using a vaccum gauge while turning the dizzy. It is definitely running rich, I say that based upon the smell and the blackish smoke I get when roming on the throttle.
I'm simply out of ideas regarding possible causes of the poor idle, I hope there's still a bunch of serious gurus here that know the tricks of the SBF.
I know my cam is to blame to a large degree. I fully intended to have a much higher than stock idle speed, but not like this, I can live with 1,000-1,200. Cam specs are
Duration: 280I 290E (228I 236E @ 0.050)
Lift: 0.506I 0.506E
Overlap: 110
Lift: 0.506I 0.506E
Overlap: 110
I have about a 10.5:1 compression, Edelbrock performer RPM heads and same (dual plane) intake, a single Holley 750 single with vac secondaries, and a 2,800RPM TC.
I suspect the timing is very close to being "perfect", I say that based upon using a vaccum gauge while turning the dizzy. It is definitely running rich, I say that based upon the smell and the blackish smoke I get when roming on the throttle.
I'm simply out of ideas regarding possible causes of the poor idle, I hope there's still a bunch of serious gurus here that know the tricks of the SBF.