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Don’t know about the numbers but the lobes look like a roller.
here are some pictures I took compared to a flat tap cam I had. I was told it was a solid lifter cam. But I was also lied to about a few other things. He had a gear drive that said went with it which I also have
I'm sorry but I really can't. I would assume, based off custom cams I've seen, the 42xxx/42xxx are lobe profiles, and the "R110" is the LSA (110). I would also assume the cam is asymmetrical, meaning the exhaust lobe and intake lobe are different. My suggestion is to take to a local speed shop or builder and have it "Cam Doctored". This is where the cam specifics are measured. Typically this is only a very small fee.
Looking in an old Comp Cams lobe book, they list the 4278 and 4279 lobe profiles in the "RZ" design. I would say this is what you have.
.266/.272 @ .050 on a 110 (.400/.380 lobe lift) The "B" indicates it is for a 1.948 journal (BBC), the "-11" indicates billet steel.
Again, "Cam Doctor-ing" it will tell you the exact numbers. Those were ground for .842 lifters.
Brandon Unklesbay
All-In Performance, LLC
hey I wanted to say thank you for the information and knowledge you passed on. I appreciate the help. I’m planning on looking around my area for a local speed shop to see if they would be able to look over it( cam docto-ring). Thanks again!
Help with cam identification
