Thread: Why my car lost 3 tenths last race

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yep i seen that looks like your running comp lifters . i would go thru the engine when you lose a roller lifter lots of junk ends up on the piston skrits and piston walls. look like a small base cam how much lift are you running . some lifters have a short life with big cam s need to keep a eye on spring pressure .if a big cam you may want to think about a 903 or 931 lifter

They are Isky lifters. Going to completely tear it down to replace all bearings and check pistons and skirts like you said. I do not know the lift of the cam so I am going to have it measured a new custom grind done with new springs.
I bought this motor used so my fault for not going through it and freshening it up before racing it.
Pat what is a 903 or 931 lifter?

Originally Posted by burnout1969

They are Isky lifters. Going to completely tear it down to replace all bearings and check pistons and skirts like you said. I do not know the lift of the cam so I am going to have it measured a new custom grind done with new springs.
I bought this motor used so my fault for not going through it and freshening it up before racing it.
Pat what is a 903 or 931 lifter?

thats the size of the lifter body . crowers hippo lifters or PBM /Ersons have pin oiling or the isky red zone