Wiped cam lobe
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
With a flat tappet cam the lifters have to rotate. before the timing cover goes back on or timing chain on put a speed wrench on a cam ger bolt and crank away. All lifters need to be rotating. If the cam depth is wrong they wont spin and you lose a lobe, possible comp gets this wrong often. Been there done that. the springs seem a bit stiff for flat tappet but have not played with those for a couple of decades so my info quite dated.
Thread Starter
Instructor
Joined: Aug 2014
Posts: 249
Likes: 0
Wiped cam lobe
I know the lifters were rotating when I had the weaker Springs on it so I don't think that was an issue.i can clearly see a circle on the bottom of all the lifters and I also checked that a while ago when I had it all apart before I changed Springs.. I'm going to pull the valve Springs and double check those but I know they are binding before 1.080 where they should be.
Thread Starter
Instructor
Joined: Aug 2014
Posts: 249
Likes: 0
Wiped cam lobe
Getting ready to have comp grind me a hydraulic roller but the thing is they don't have the exact lobes that Howards has.. They recommended a 12-444-8 which is a 580 lift exhaust 562 intake.. I'm trying to avoid pulling the engine and heads to check clearance.. Do you think I'd be safe with that cam?
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Le Mans Master
Joined: Feb 2005
Posts: 6,479
Likes: 565
From: Clearwater Florida
........... Check your coil bind with the retainer on the springs ... the step on the retainer for the inner springs will typically occupy a tenth of an inch of spring height .........
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Instructor
Joined: Aug 2014
Posts: 249
Likes: 0
Wiped cam lobe
Another question... Is it ok to use used hydraulic roller lifters? I know you can't with flat tappet cams.. I see someone selling a used set of comp 853-16 lifters and they say they only have 200 miles on them. For a couple hundred bucks...
Thread Starter
Instructor
Joined: Aug 2014
Posts: 249
Likes: 0
Wiped cam lobe
Ok getting ready to install the new cam. 2 questions.. Would I be ok to use a nylon cam button or do I need to use a roller button? And do I need a Torrington bearing or wear plate behind the cam gear? I have heard yes and no and I just want everything to work here..