Roller Rockers in Stock

[Dwight Southerland]

Originally Posted by Alan Roehrich

Jeff, Holroyd's rockers are STOCK GM, the studs and adjusters are similar in material to the ARP rocker studs.

However, allowing roller rockers will absolutely bring about serious unintended consequences, for the reasons I outlined earlier.

Alan -

Your argument on the basis of logic whows a bias toward yourself, as well as most of the arguments presented here. Just because "Holroyd's rockers" are available from GM doesn't mean anything; GM is more capable of producing high quality race parts than aftermarket suppliers (more budget, bigger staff, bigger economic base to absorb R&D costs and a product that will make no profit.) Before the new rule revision, you BBC racers enjoyed an advantage of being able to cross breed some factory race parts that were never specified as even replacement parts for the engine combinations you are racing. So it is with most engine combinations, especially when you get into the higher classes that require engines that produce enough power and RPM to exceed the capability of OEM, assembly line specified parts. Allowing roller rocker arms at this point willl make so little difference in the playing field (unless you are afraid of some of the engine combinations mentioned that use shaft rockers) and will provide a way to eliminate breakage for you and everybody else.

It's the open valve spring rule and the elimination of requiring stock duration that is killing the budget for stock cars, not roller rocker arms or big push rods. If you had to retain stock valve spring pressure, rocker arm breakage is not a big issue, and there would be no 8000 RPM+ engines.