6/12/2009
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Company: Comp Cams
http://www.compcams.com
Camshaft Kit for GM VVT Engines
New camshaft kit from COMP Cams® modifies L92 cam phasers to provide significant gains in upper-rpm power without hurting bottom-end & mid-range performance
New camshaft kit from COMP Cams® modifies L92 cam phasers to provide
significant gains in upper-rpm power without hurting bottom-end &
mid-range performance.
Rather than find ways around the recent advances in GM engine
technology, engineers at COMP Cams® have found a way to work with the
innovation to produce a powerful line of cams for the newer L92
engines. This new series of XFI™ SPR (Valve Springs & Phaser
Modifications Required) Camshafts features four unique cam grinds that
each provide substantial gains in both torque and horsepower.
The 2007 and newer GM L92 engines utilize Variable Valve Timing (VVT)
technology, which changes the timing of the valves while the engine is
in operation. VVT is controlled via cam phasers, which are computer
controlled cam gears that automatically optimize camshaft timing based
on the current engine rpm. While this technology provides tremendous
efficiency benefits, it presents a challenge when designing performance
camshafts. This is due to the wide range of valve timing movement which
causes piston-to-valve clearance.
As a result, the COMP Cams® engineers have developed a Cam Phaser
Limiter Kit (Part #5456) that restricts the range of cam timing
movement from 50 degrees to 20 degrees. While still utilizing the
efficiency benefits of the VVT technology, this modification provides
the necessary valve clearance for larger, more serious performance
camshafts with tighter lobe separations. The resulting increases in
upper-rpm horsepower (70+ hp) from a simple camshaft swap are some of
the largest ever seen by valve train experts at COMP Cams®, and these
gains occur without any sacrifice to bottom-end or mid-range
performance.
These new performance camshafts are designed for use with the COMP
Cams® Phaser Limiter Kit (#5456) and Beehive™ Valve Springs (#26918).
For additional information on all the latest COMP Cams products, visit www.compcams.com.