PRC 237cc Specs / Flow / Pics INSIDE!!
12-11-2008, 03:52 PM
#22
Working on checking several different aftermarket rockers, I'll let you know. I would seriously doubt the standard aftermarket rockers wouldn't fit. The new valve spring is a little bit larger than the standard 1.29" springs we're use to seeing, but it's big heavy valve friendly so the LS7/LS3 guys should be really happy!! 
I was under the impression they were moved around since you guys run the MS4 with a small chamber and no valve reliefs.
ET 11 degree heads also can use stock rockers. The thing is valve guide wear is increased with stock rockers. The reason we went closer 13 degrees is it still allows us a reasonable valve length for weight issues, yet it helped to free up needed p/v so we can offer smaller chambers to those big camshaft guys!!
The cylinder head isn't limited to 13 degrees though, we have options to change this up down the road if we decide to go a different direction.
The cylinder head isn't limited to 13 degrees though, we have options to change this up down the road if we decide to go a different direction.
Perhaps one of us misread this, but you'd need valves designed for these heads. With the 13* angle they are going to use valves that are longer than normal 15* stuff.
