SCORE Journal - The Official Publication of SCORE Off-Road Racing
Issue link: https://read.uberflip.com/i/485293
RHS® LS Aluminum Race Block GM LS engines have set a new standard for V8 performance and durability. However, there are limitations with the factory blocks when it comes to building all-out power for off-road machines. Today, a host of aftermarket big-guns are producing replacement engine cases that address these concerns. One of them is Racing Head Service RHS® who developed its LS Race Block that is designed for added clearance and customization. Available in both standard (9.240-inch) and tall (9.750-inch) deck heights, with an extra-thick deck surface (.750-inch), the RHS® block features a raised cam centerline and priority main oiling via an oil galley that is shifted outboard to allow rod clearance for a much larger stroke (4.600-inch) while also minimizing windage in the crankcase. Using computer-aided design, the cylinder walls are Siamese cast with press-in spun cast iron liners. Cylinder liners are available in both standard deck (5.67-inch/5.87-inch – same as the LS7) and tall deck (5.94-inch/6.38-ich) lengths. Also featured is a six-bolt head design with a full water jacket around each cylinder (based on the LS7 design). For quality control assurance, RHS® performs a CT scan on each block (similar to a medical CAT scan) to maintain maximum casting precision and consistency. Combine all of these features with a high finish quality, and you’ve got a GM block that is up for the meeting the LS horsepower, torque and durability demands. For more information, call 1-877-776-4323, or visit www.racingheadservice.com. Comp Cams LS-based Solid Roller Cams Camshaft design has come a long way for the LS-based engines. Comp Cams’ lineup of LS GEN III/IV solid roller camshafts deliver some of the most aggressive lobe profiles that have ever been designed to maximize the potential of these high-power engines. The result is massive increases in horsepower output, throttle response, and upper rpm capability over factory hydraulic roller patterns, which won’t live up to the rigors of off-road competition. Most engine builders have specific requirements for cam specs and the Comp series of solid roller designs fulfill most of the needs required by specific combinations. Along with the latest in computer lobe design and high-end materials used in manufacture, the Comp lineup offers the engine builder almost endless combinations of specifications to custom tailor to the horsepower and performance they’re after. For more information, call 800-999-0853, or visit www.compcams.com.