Hydraulic roller lifter
#3
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Go with lifters from Bob. He will recommend Morels most likely.
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#4
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In a stock 502MPI engine I would save your money and just install a new set of GM hydraulic roller lifters in the engine. We've been using them for years in mildly sprung motors and never a failure. GM Parts Direct.com for a good price.
Regards,
Ray @ Raylar
Regards,
Ray @ Raylar
#5
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Be sure the top of the factory lifter doesn't drop out of the dogbone. This becomes a concern at around .600 lift. Can be visually checked at assy. You don't need fancy gauges to see what I'm referring to.
#6
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Boaters who are re-camming there engines or building new engines should also pay attention to the new or replacement camshafts base circle size. A good camshaft company should give you a new proper size core billet camshaft not a regrind and this camshaft even with valve lifts of up to .650" lift should still have a base circle size of about 1.200" which will keep the lifter from dropping down so far it starts having a problem staying contained in the lifter alignment dogbones. We've seen this problem on a lot of engines where the camshaft had to small a base circle from poor camshaft design and grinding not eh net or gross lift numbers!
Regards,
Ray @ Raylar
Regards,
Ray @ Raylar