Join Date: Sep 2000
Location: Mercer Island, WA U.S.A.
I am running open chamber #049 oval port heads. I have hardened intake and exhaust seats. I run a 2.07 intake, 1.88 exhaust valve. I run the 396-375 horsepower 11.1 to 1
piston, trw# L2242F 0.30 oversize. My total CR is 10.5 to 1. I have a full msd ignition system. 35 degrees total timing. I use a 2" primary,3.5" collector headers and 3" torque tech exhaust system. The problem is not detonation and I have no header leaks. The engine runs really well, I have an old set of edelbrock finned alum. valve covers and clearance is not a problem. I do know this, The noise was worse with the Alum roller rockers and the body of the rocker might have been touching the rocker stud. I put comp cams steel rollers and replaced the pushrods and guideplates just to be safe. I have a ton of clearance everywere but still have the sound that comes and goes. This engine has 700 miles on it, I have changed the oil 5 times and have not seen and problems except the high pitched ticking sound that comes and goes. I relashed after changing the rockers,Half past zero, at 200 miles and wonder if the cheep alum. rollers caused the cam to go? I have no oiling problems, I had correct Valve spring pressure, all I know is the sound has gotten louder and really is heard at high rpm. I also have a tight timing chain, Cloyes true roller. I really think It's the hyd. cam and will pull the old cam out soon, I dont drive it, and put a solid lifter cam in. Any one have any input?.