Ok I have had the stage 1 together now for about a 1 1/2 years. Its a pretty healthy street motor. It has JE forged pistons. The noise i hear sounds much like piston slap. I have a 2004 chevy 3/4 truck with the 6.0 litre engine and it to makes a noise but it quiets up alot faster. The 464 make this noise unitl it starts to get aroung 150 deg then it stops. Is this normal or is there something up. As far as i can remember it has always made this noise. Is it piston slap? or a bigger problem? It does go away it justs takes awhile, no shaving in oil or oil filter.
My El Camino hotrod does the same thing. In that case, it's KB Hypereutectic pistons, and the knock is gone quite rapidly after startup.
wow isnt that kind of unusual for hyperutectic pistons. i read that they have a much lower rate of thermal expansion and run a tighter piston to cylinder wall clearance. if this is true then noisy startup should not be an issue with hyper pistons with proper clearances. Bob
Yeah, that's what I thought. My machinist says it's pretty common with the KBs, though. Gentile knock for a few seconds, then it's gone. Worse in really cold weather, and not as noticable in hot weather.
Hydraulic lifters? I'm by no means a mechanic (going to UTI next year for it though) but it sounds to me like it may be that your lifters are floating until the oil warms up and fully pressurizes them. Is it a tick, like two pencils being hit together? Then again I may be smoking crack.
No, you aren't nuts. And yeah, it's tough to diagnose via Internet. What I have is too deep for lifters, and too quiet for bearings.
