Quote:
Originally Posted by carl hinkson
Those lifters mentioned if you are putting them in a .844 lifter bore they are to small.
Comps, Crowers and ISKY"s are .8405 to .8415 in that area and to put them in a GM lifter bore that is .844 and more so on the old blocks with short lifter bores. Running lifters in a bore with .003 clearance lifters are not happy and will show it as they looked scuff because they are using the bottom of the lifter as a cutting tool.
Morel seems to be to OEM size whether its a .842, .874 or .904
When machining for roller lifters I measure I measure each lifter and make sure bores are machined accordingly.
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My engine guy in Tampa ran into that issue with the .904" lifters in Mopar engines. He said the lifter bores were originally .9050" to .9058". The lifters were .9040"-.9045".. Now the lifters tend to be sized for a .904" bore. He finds a lot of leakage of oil like what was in that video.