I'm building a set of small block mopar J heads 2.02 1.60 vavles with hardended exhaust seats.
I've been told to keep the rotators in my some and not by others. My concern is i am not sure if mopar cuts a deeper channel for the exhaust spring to sit in to make up for the thicker rotator. This is affect my installed spring height and spring pressure if it is not.
What are the benefits and cons to using rotators over just plain retainers.
JERRAME AT CREB SAYS THAT THE ROTATOR IS DESIGNED TO COOL THE VALVE BUT IF YOU NEED THE ROOM FOR SPRING HEIGHT TO RUN A BIGGER CAM HE'S RUN ALOT OF THEM WITHOUT THE ROTATORS AND NEVER HAD A PROBLEM. SO ID PERSONALLY RUN IT WITHOUT THE ROTATORS,BUT IF YOU HAVE ANY QUESTIONS HE'S A MEMBER OF THE BOX SO SEND HIM A PM AND HE WILL ANSWER ANY QUESTIONS YOU MAY HAVE.
-- Edited by RATZ28 on Wednesday 19th of January 2011 02:25:15 PM
The cam i have in isn't huge it's actually one of the smaller mopar purple cams. I have been told you shouln't remove them from a mostly street motor, probably because you will burn out the valve. Another concern is that added spring pressure on the flat tappet cam.
I"m not shooting for a hi-performance engine by any means just a nice reliable 325hp cruiser. I don't need to make a multi thousand dollar mistake for a 50 dollar part.
keepers are cheap. i would just run 10* retainers and matching keepers. good move on not running the rotaters. i was told before that with a more aggresive cam than stock that the valves will rotate too much and "saw" themselves into the seats. how many aftermarket heads do you see with rotaters? not even the basic edelbrock ones. good luck.
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