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Old 05-24-2026, 01:37 PM
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Skippy597 Skippy597 is offline
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Join Date: Mar 2021
Location: Ephrata, washington
Posts: 461
Default FWIW I broke in a flat tappet and it survived

With all the doom and gloom towards flat tappet cams lately, you rarely hear any good news so I thought I'd share something positive.

Recently did a cam swap on my AMC 360 (I know it's not a Pontiac but it still applies) and everything went fine.

Here's what I used:
-NOS Erson cam (tq20 grind)
-New Hylift Johnson lifters that I sent to delta cams to get their oil notch mod (it's a buck a lifter) and it's similar to crower cam saver lifters but the notch doesn't go all the way down to help with oil pressure
-Isky Revlube on cam and lifters
-Lucas 30w Break in oil filled with extra 1.5 qts
-stock springs for break in (they clear with cam specs)
-varying rpm between 2200-2500 every few minutes and a few blips of throttle in between

I was almost positive that with all the horror stories I'd have to pull it and deal with a flat cam but I was pleasantly surprised.

Just thought I would share some good news on the cam front.

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