Quote:
Originally Posted by Formulajones
Hey Murf,
I have pics of them side by side, maybe you can compare them to yours and figure this out. These are both from Comp for a Pontiac. The pair on the left are Johnson that Comp used to sell, now sometimes I think they substitute Morels. The pair on the right are the "S" lifter that Tom commonly refers to them. They are Shaver lifters.
As you can see the "S" lifters actually have the correct oil band and are slightly taller overall.
The problem I ran into was that they both (at the time) carried the same part number for a Pontiac from Comp Cam. So I would order these but you never knew what was coming in the box until you opened it. It just depends on what Comp has in stock at the time. I think that's where the problems start for people that buy these things and don't realize there are 2 different bodies floating around. Then the confusion begins.
I got to the point I wanted to make sure I was getting the "S" lifters. I bought the last set from Paul K. on the forum. Great thing about that is that Paul is nice enough to open the box, make sure they are the correct style, and then ship them to me. When in doubt, order from Paul K. They have worked and run whisper quiet for me in the Pontiacs. Tom has mentioned they are made in Southern Cal.
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I`m running the Johnsons on the left. 400 lobe cam. 3/4 turn preload on 7/16 studs. No problems. Quiet. Have been to 6500 twice and 6000 many times.