wasco
Well-Known Member
I have about ten miles on my fresh 383 now, and took the car into get an alignment done yesterday. Unfortunately, they found a couple front suspension components that need to be replaced first, so I took it back home. I noticed some lifter noise once or twice when I didn't quite get enough gas to it, which is normal for a manual, but I was surprised anyway. I had done the standard 30 minutes above 2000rpm and everything went well.
I started looking into the break-in process instructions for Comp Cams and immediately got concerned. I'm looking at the instructions (Comp Cam CL-23-223-4 flat tappet, hydraulic lifter) and they say "remove the inner valve spring or use low load springs". I looked to see what my Edelbrock Easy Street aluminum heads use for springs and they are Edelbrock 5792 Sure Seat Springs - single coil. Comp Cams says 110-120lbs seat load, 260-270lbs open load. Edelbrock says the 5792 is rated for 120lb installed pressure and 320lbs Open Pressure. Edelbrock also lists the 5792 spring as for "cast iron heads only" but use them on their aluminum heads?
Do I need to adjust valve lash at all after initial break-in or after 500 miles or ?
I started looking into the break-in process instructions for Comp Cams and immediately got concerned. I'm looking at the instructions (Comp Cam CL-23-223-4 flat tappet, hydraulic lifter) and they say "remove the inner valve spring or use low load springs". I looked to see what my Edelbrock Easy Street aluminum heads use for springs and they are Edelbrock 5792 Sure Seat Springs - single coil. Comp Cams says 110-120lbs seat load, 260-270lbs open load. Edelbrock says the 5792 is rated for 120lb installed pressure and 320lbs Open Pressure. Edelbrock also lists the 5792 spring as for "cast iron heads only" but use them on their aluminum heads?
Do I need to adjust valve lash at all after initial break-in or after 500 miles or ?