Stainless, Bushed PRW Rocker Arms

mopowers said

Mine aren't grooved either and my PRW rockers are going on 8-9 yrs or there abouts without an issue whatsoever. I was just asking because if it was so necessary as stated in post #52 by Rat Bastid, why are there so many folks who haven't had a problem running the stainless PRW rockers without grooved shafts (myself included)? And why does B3 sells them if grooved shafts were needed?

Click to expand...

I can tell you why I have not done the banana grooves on my shafts yet.

Because (for whatever reason) PRW uses two bushings of which the total width is less than the total width of the rocker body there is a gap between the two bushings and that’s where the adjusters and the oil hole at the top of the rocker get its oil.

If they used a full width bushing like RAU does then I’d groove them.

I suppose PRW does it that way because it’s cheaper. You give up some bearing area but so far I haven’t had that be an issue.

Yet.