original motor wiped cam lobe oct 2013,
march 2014 REBUILT ENGINE SPECS.
4.020" 4 valve relief flat top pistons
CHEV FUELIE 186 HEADS - 64cc - 1.94 X 1.50 valves - screw in studs/guide plates and machined for positive stem seals
mild cleanup and gasket matched to EDELBROCK PERFORMER 2101 MANIFOLD, center divider wall machined down 1/2”
pcv and all breathers installed correct for a 1972 engine.
HOWARDS RETRO FIT HYD ROLLER CAM – CL111145-12 - RPM Range: 1500 to 5600
Duration Exhaust: 278 Intake: 272 Duration @ 050 Exhaust: 225 Intake: 219
Intake Centerline: 108 Lobe Separation: 112 Valve Lift Exhaust: .525 Intake: .510
Stock GM cast exhaust manifolds into twin system with “H” crossover pipe behind cross member.
Unfortunately I do not know the compression ratio, my engine builder passed away earlier this year.
It won't be a high comp build, I run std 91-95 octane (Australian spec).
oil used is ULX110 - 20w50
engine was started and rings bedded in by builder.
on the front base plate of the quadrajet carbProPower engines wrote:Where is the PCV connected??
at about 800rpm in neutral it pulls 16.5 vac and 12ish when driving along.ProPower engines wrote:You never mentioned how much vacuum it pulls while running. If it has good vacuum it may be a ring issue more then a guide issue with that much build up on the plugs in that short of time.
yesProPower engines wrote:Where they new pistons??
unknown now as my engine builder passed away earlier this year.Dan Timberlake wrote: Just for the record, what ring manufacturer, and part number?
What were ring gaps? Got pictures of the cylinders during the re-ring job?