If there is one thing among many that GM engineers got right on factory LS engine, it is the rocker arms. They are fine pieces for use in many engine builds and hot rodders have proved that point over the years. That being said, as more and more power becomes the norm, that parts and pieces used to create that power have to be able to stand up to the greater forces at work throughout the engine. Thats why COMP has released the SPR Radius Tip Rocker Arms for LS1 and LS3 engines.
Engineers at COMP used their knowledge gained from developing parts for F1 racing, stock car racing and other venues to create a tool steel rocker that drastically reduces the sweep of the arm over the top of the valve. These rockers can be had in either a bushing style or a needle bearing style construction as well.
The rockers bolt onto stock engines and do not require any sort of special work, fabrication, or pieces to fit. There are many innovative benefits that the COMP team he worked into these rockers and you can learn about them below!
COMP Cams® SPR Radius Tip Rocker Arms For GM LS1 & LS3 Engines Reduce Sweep Across The Valve By 400%
Memphis, TN – The latest state-of-the-art rocker arms from COMP Cams® utilize design techniques borrowed from NASCAR and F1. The cast tool steel SPR line features sculpted, thin-wall construction and a centered multi-radius valve tip that reduces sweep across the valve by 400 percent. Offered with assembled needle bearing or bushed trunnions.
A direct bolt-on to OEM trunnion stands for GM LS1 and LS3 engines, the SPR Radius Tip Rocker Arms are 30 percent stiffer than the baseline OEM rocker design for maximum rigidity and dynamic stability. The Finite Element Analysis-optimized design also provides three times less MOI (moment of inertia) than competitor aluminum roller tip rocker arms. Additional features include a coined nitrided tip to reduce friction, as well as an increased ratio for more lift and area, though they are virtually interchangeable with stock ratios due to improved dynamics and less loft. LS1 rockers feature a 1.77 straight ratio while LS3 versions are 1.77 offset.
