451Mopar
Well-Known Member
What was causing the oil burning? Valve guides or rings/cylinder walls?
If you rebuild the 383 with stock stroke, I would get pistons that have valve reliefs.
When I built my 383 back around 1988, I used the Sealed Power forged pistons, sit near the top of the deck at TDC, but no valve reliefs.
I also had milled 906 heads, with port job, hardened seats and single valve springs.
I over-reved the engine (stupid shift kit that lets you select first gear at any speed), and bounced a few valves off the pistons, bending them.
The cam I was using was the Crower High performance Compu-Pro 228/236 duration @ 0.050", and 0.478"/0.502" lift 112 LSA.
They recommended EITHER the single valve spring OR dual valve springs. When I put the engine back together, I used the dual valve springs.
This combination was not that great for me. I was using a stock converter and 3.23:1 gears, and the cam seemed to be just a bit too big. Likely it was fine if I used a looser torque converter? It would rev easy to 6,000 RPM (about 150 MPH) where it would toss the A/C belts off all the time.
Don't know exactly what combination your going with, but sounds like you may want a milider (duration) cam that what I used?
If you rebuild the 383 with stock stroke, I would get pistons that have valve reliefs.
When I built my 383 back around 1988, I used the Sealed Power forged pistons, sit near the top of the deck at TDC, but no valve reliefs.
I also had milled 906 heads, with port job, hardened seats and single valve springs.
I over-reved the engine (stupid shift kit that lets you select first gear at any speed), and bounced a few valves off the pistons, bending them.
The cam I was using was the Crower High performance Compu-Pro 228/236 duration @ 0.050", and 0.478"/0.502" lift 112 LSA.
They recommended EITHER the single valve spring OR dual valve springs. When I put the engine back together, I used the dual valve springs.
This combination was not that great for me. I was using a stock converter and 3.23:1 gears, and the cam seemed to be just a bit too big. Likely it was fine if I used a looser torque converter? It would rev easy to 6,000 RPM (about 150 MPH) where it would toss the A/C belts off all the time.
Don't know exactly what combination your going with, but sounds like you may want a milider (duration) cam that what I used?