Cam lobe to lifter alignment

Is there a proper spec to the offset of the cam lobe to lifter for a flat tappet hydraulic?

 

I suppose so, but it's inherant to the spacing of the block and cam blank. You could re-bore and sleeve a block to manipulate the relationship, but thats a lot of effort for minimal if any return? That said, when I look in most lifter valleys I expect to see something like an eighth of an inch of lifter face hanging off the side of the lobe.

 

Install cam and lifters. Mark lifters top w a sharpie. And turn cam to make sure lifters spin. If lifters don’t spin swap them around. If they still don’t. Send out to be recrowned. The cam is designed to make the cam want to be back against the block with a taper on the lobes.

 

Looks good
That cam does have run time on it yes?

 

Jr, if you are concerned about your lifter overhang there.. that’s normal and helps the lifter spin. I just looked at some pictures of my lifter valley on my 455 that has about 800 miles on it and it looks the same. And it runs fine.

 

Can you post some pics?

 

This cam wiped on dyno after engine break in. Have another from bullet on the way. Next dyno day is Jan 31

 

JR, see below:

 

Thanks!

 

You check for lifter spin with just the lifters installed? No pushrods?

 

Correct. Dry cam, dry lifters, mark a line on them........turn cam and see if they spin. I put all th lines going 1 direction so its easy to tell

 

Yes sir

 

Very interesting. Smart guy and he listens too to those interested.