Running the 212 Comp.Cam Iron Roller??

[frankg]

Just wanted to know how many people are running the Iron roller cam 212-212 from Comp Cams. Have you had any problems with it. Please give me any info on the performance of this cam. Has anyone used higher ratio rockers without problems(piston-valve clearance or coil bind with supplied honey comb spring)??? Thanks,Frank

 

[TS6]

I'm using it with 1.65 ratio T&D roller rockers, no problems here. Used the springs that came with my GN1 heads though. No performance #'s yet, gotta wait for summer!

 

[JOHNZAZA]

wht would happen if you run roller lifters on a flat tappet cam?

I have a 212 flat tappet and it's great.

 

[turbosam6]

I dunno, but it doesn't work. The 2 items are not compatible. It was before my time, but I think the "budget roller" fiasco involved a bad idea like that.

 

[postal]

wht would happen if you run roller lifters on a flat tappet cam?

I think its kind of like a women with a set of those spiked heel shoes. Its concentrates alot of weight(force) in a small area. the roller part of a roller lifter makes a smaller area where the lifter and cam lobe touch. This makes for a lot of force in a smaller area. then when you throw in the fact the the rollers usually run stiffer springs it just makes it worse and the lobe self destructs.

Jason

 

[JOHNZAZA]

THAT MAKES SENSE.

 

[ijames]

The other consequence of the roller being smaller than a normal lifter is that on the flanks of the lobes the roller gets less lift than a normal lifter, so you won't get anywhere near the expected lift vs. duration behavior. That's why a roller cam always looks like it has way more duration than it does, assuming your eyes are "calibrated" for flat tappet cams.

 

[turbo buicks]

what? so a 212-212 roller is really a 206-206? i dont get it.

 

[Pronto]

No, the lobes just look so fat and big in comparison to a flat tappet. Very deceptive but the rollers offer alot of benefits to all engines-turbo or n/a. They are just much more $$$.