Roller Rockers in Stock

[SSDiv6]

Originally Posted by Todd Hoven

No on roller rockers, get a cam with a softer ramp and you will reduce the breakage. there are other ways to keep the rockers breaking besides using Jessel rockers. Besides Jeff, you race super stock you dont have a dog in this fight anymore. I wouldn't think it would matter to you.

Todd, first at all, there has been aggresive ramps on Stocker cams since day one, even when the rules were more restrictive. Dwell lobes have been available since day one. The aggresiveness of the ramp is limited and dictated by the lifter size.

Who said people are asking for Jesel rockers??? What people are asking is for your standard stud/roller rocker type aluminum rockers. The problem with current rocker arms is that the replacement parts are junk. To save money, made of inferior materials and processes, made overseas, by companies run by accountants ( with the exeption of Julie Jordan ) and not engineers.

I know this for a fact since I have done lots of metallurgy analysis on current replacement and early OEM rockers arms and there is a big difference. I have applied all kinds of coatings and aerospace treatments to stamped rocker arms; they still fail because the inferior materials used in the stamping process does not allow for a uniform metal thickness in the rocker arm, especially in the pushrod cup area, which happens to be the weak spot. You do not need to have big spring pressures to have a replacement stamped rocker arm fail; I have seen them fail with as little as 125 lbs seat pressure.

The rocker arms sold by Holroyd, are heavy duty pieces design for truck and industrail engine applications. Prior to the Holroyd parts, many racers were also experiencing rocker arm failures, including small block Chevies, AMC's, Oldsmobiles and other makes.

Like Jeff, I know of many racers looking for old OEM rocker arms at wrecking yards. By the way, your comment about Jeff Lee not having a say was out of line. Jeff spent lots of money on his AMX while racing in Stock eliminator, and probably one of the reasons why he switched to Super Stock was due to having engine failures caused by rocker arms. Therefore, he has the right to share his opinion on this matter.