![]() ![]() It uses a state-of-the-art cam lobe design to pull strongly past 6,500 rpm even with stock springs. Idle speed can be tuned for smooth idle or a noticeable lope. The Summit Racing Stage 1 drop-in truck cam is great for day-to-day drivability and produces incredible torque right off idle. Idle speed can be tuned for smooth idle or a slight lope. It makes much better torque and power across the entire RPM range. Efficiency cam produces outstanding torque right off idle and maintains efficiency. ![]() Summit Racing Pro LS/Vortec Truck Swap Cams Part Number lift, a 6,500 rpm redline and could run for over 100k miles on a set of springs. Why LS6 springs? The 405 horsepower LS6 had. The Stage 3 and 4 truck cams are also designed around the LS6 springs.The Stage 2 truck cam will too, but Summit Racing recommends LS6 springs to extend the rev range.The Stage 1 truck cam is designed to work with the original springs.Next, let’s talk about valve lift and the springs that match. You can get the idle you want simply by raising or lowering the idle speed a bit. They won’t lug or surge, and are designed to maintain part-throttle efficiency. Idle quality is important and your tuner will find these cams are easy to work with. It hits hard at 2,800-3,000 rpm –and keeps pulling through 6,800 rpm. The Stage 4truck cam makes great power with a killer idle.The Stage 3 truck cam works well with a stock stall, but a 2,500 is recommended.The Stage 1 and Stage 2truck cams are designed to work well with the stock converter.The truck cams have intake closing points between 36 and 41 degrees after bottom dead center (BDC) for maximum punch where the converter hits. Pro LS Truck cams are designed to make power where it’s needed. Here are those same specs in a single downloadable PDF: *** Summit Racing Pro LS Cams Printable Spec Chartĭetailed spec charts for every Pro LS Camshaft are listed in the continuing story below. Want to know the rpm range? Look at the intake valve closing column. Summit Racing Pro LS cams take the guesswork out of choosing the perfect cam.ĭo you want to know what your engine will idle like? Look in the intake valve opening column. Pressure on the piston before bottom dead center (BDC) helps, but works against you after BDC on the exhaust stroke. It generally hurts low rpm performance, but is increasingly helpful at peak torque and above. This event, in conjunction with IVO, creates overlap. This event has the most control over idle quality. ![]() ![]() This event has the most control over the operating range. Need a refresher on the valve events? Here they are in order of importance. *** Summit Racing Pro LS cams listed in this format: Important note: Summit Racing Pro LS Camshafts are not legal for use in California or other states with similar laws/regulations. Please check your state and/or local laws/regulations.
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