Joined: Fri Mar 13 2009, 11:21AM
Location: San Marcos, CA
Posts: 713
That looks pretty good. The cost is going to be more, because the roller rockers don't work with the stock pushrods, you will need cup type pushrods. My $.02
For a stock setup i would imagine they are alright and the price is good,but if you are going to use a spring with moderate to high spring pressures i would stay away from them. For that price i guess it's worth a try.
Joined: Wed Feb 24 2010, 03:46PM
Location: Moline, IL
Posts: 95
I ordered a set when I rebuilt my engine, they didn't fit at all on my heads, Edelbrock Performer RPM. They were too short and I couldn't get the roller anywhere close to the right position over the valve. I kept around knowing my New Yorker will need the heads rebuilt, hoping maybe they'll line up right on the stock heads. I ended up going with Hughes Engines rockers, but they are over double the price.
Joined: Wed Nov 17 2010, 03:28PM
Location: florida
Posts: 1311
I have the hughes rockers also,1.6 ratio. I wouldnt use the proform rockers. Spend the money for a good set. Are you lookin for new rockers cuz they are cool or are you rebuilding entire top end . Like said you will need proper custom sized pushrods and springs. Sometimes shimming is also needed so they dont prematurely wear the valve stem tops.
Joined: Sat Aug 19 2006, 05:03PM
Location: Ontario, Canada
Posts: 2919
In the engine for my Windsor, the only component I cheaped out on was the rockers. I bought CAT Performance cast adjustable rockers, which were a knock-off of the Comp Cams rockers at a fraction of the price. Well, they galled the shaft and hung a couple valves open, which hit the pistons. That made for a very expensive day on the dyno, and I wound-up buying the real Comp rockers in the end.
My brother took one of the rockers to work and tested the hardness and it was very soft. Either they weren't heat treated properly or the wrong alloy was used in their manufacture. I guess I wasn't the only one who got burned, because shortly afterward CAT later redesigned their rockers to incorporate bronze bushings to prevent this type of failure.
