|
Not all lifters are created equal. Comp's High Energy hydraulic lifters are produced with a longer piston than conventional lifters, and also feature a lightweight check valve disc that allows for quicker response, and added oil control at all engine speeds and loads. Use these Comp High Energy Hydraulic lifters with all of our Comp High Energy hydraulic cams, UNLESS the engine will see above 5000 RPM. Above 5000 RPM (or for any type of racing applications,) we highly recommend their Pro Magnum Lifters shown below. At these higher RPM's Comp has done extensive testing. They have found not only were the Pro-Magnums good for about 10-15 more horsepower, but they also do not succumb to lifter "pump-up," a condition where the internal piston inside the lifter can fill up with oil and not have enough time to drain or "bleed down." This can result in the piston being in an improper position as it "pumps up," which can lead to holding valves open, which in turn can lead to greatly reduced power output, or in some cases (if that open valve happens to strike a piston top) there can be extreme engine failure. These lifters are considered essential to ensure that your cam has the longest possible life and is fully covered under Comp's warranty policy. And, since this is Comp we're talking about, you can be assured of two things: The product is 100% made in the USA, and the quality is second to none.
|
