I'm trying to determine what roller rockers to go with. I will be running a 230/236 cam with .598"/.608" lift. I had found a good deal on the GM Perfomance parts Aluminum roller rockers, but I saw on one site that they are only good up to .575" lift. (I believe these are the same as the either crane or comp cams rockers but I forget which ones).

I'm wondering what roller rockers are capable of supporting lifts of over .600"? Also, what limits a roller rockers lift capability? Any help would be appreciated.

Thanks,
Rob

 

im running .575/.595 lift with comp pro mag 1.6 without any issues. They are about 235 for the non SA.

 

It appears these rockers are identcal to the Crane Gold roller rockers. I was wondering if anyone is using the Crane version with high lift cams as I do not see any restrictions on lift noted on Crane's web site.

Thanks,
Rob

 

With a high lift cam you should always be careful to check the clearance of the rocker body and the valve retainer, but rating a rocker for a certain lift is something I never heard of.

I am using the Crane's and my exhaust has .587" lift with no clearance problems, if that's of any help.

Rich Krause

 

exhaust lift of .640 w/Pro-Magnums. No problems whatsoever.

 

Yeah Bob, but lets not talk about Valve Lash!