Roller Rockers

[Andrew]

Is anyone familiar with these Comp roller rockers? Are they any good? They are about 10 years old, and I was hoping to use them for a rebuild I'm doing on a 493" with eddie rpm heads. I still haven't chosen a cam, and I was wondering if using these rockers would be a limiting factor.

 

[godfatherofchry]

well if their that old I think they speak for them self.not to sound like a smart ***, but I would use them..I would check to see if the rollers have no flat spots in them.rolling them on your finger should tell you that.with some pressure on them.if this helps,,Artie

 

[roadrunnerman]

from the picture they look darn good.i don't see where they wouldn't last another ten years until normal cruising and a romp-on-it once in awhile

 

[eagleone1983]

I've got a pair of those on my 383. Haven't actually ran them but they look good. They are the pro magnums and I did some research before I bought them and everything was positive.

 

[64 Post]

Use with springs that have no more then 400# open pressure. Comp claims they'll take a bit more, but...

I'm currently using those rockers with 350# open pressure, no problems so far.

I would recommend using some better hold downs, perhaps some Hughes or RAS pieces.

 

[dantrap]

Hi Andrew, 64 Post has it correct. I have used these with a .590" mech. flat tappet cam 6800rpm & no problems. However i made the mistake of using them on a roller motor with high spring pressure 450-500#, they all galled to the shafts, an expensive mistake. They are great if used as intended.

 

[Andrew]

Would a mechanical roller cam with a given lift have more spring pressure than a mech flat cam with the same lift?

 

[dantrap]

Yes, A Mech. Roller typically has a lot more spring pressure even at the same lift. The cam lobe lift rate ( by design) is much faster open and closed. So you need a strong spring to maintain contact of the lifter roller to the cam or you will float the valves and cause damage. There is a lot of tech info you can find on line for a more complete explaination , but this should help. Good Luck.