If there is one performance limitation to hydraulic roller lifters it is the maximum rpm capability they can maintain in race applications. The internal hydraulics of standard roller lifters are susceptible to pumping up around 6,200-6,500 rpm, causing horsepower robbing valve float along with the possibility of severe valvetrain damage. At this point there are two options for racers: 1) Switch to a solid roller setup, which requires various upgrades and routine maintenance or 2) Upgrade to a Lunati High RPM lifter and get the rpm capabilities similar to a solid roller with the long, maintenance-free life of a hydraulic roller.
These aren't your "I just want to cruise around town going the speed limit" kind of valvetrain parts. We are talking about a hydraulic lifter that can withstand 10 million (you read that right) cycles on a Spintron (valvetrain dyno) and operate in rpm ranges over 7,000 rpm. What makes these lifters able to excel in areas where competitor's hydraulic lifters would have failed? Because we only use the best of the best and cut no corners to ensure our customers get what they pay for. The construction begins with a Lunati propriety steel alloy body that is completely micro polished for a smooth microstructure finish. This finishing process reduces friction between the lifter and lifter bore, and works in conjunction with a precisely controlled internal oiling system and strict internal tolerances. These revolutionary hydraulic internals can withstand elevated valvespring pressures, up to 575 lbs., that would make our competitors tremble. We didn't stop there with the innovations. We then incorporated a 0.750-inch diameter lifter wheel which is 0.050 inches larger than the "leading" competitor's products to give you the most out of your aftermarket camshaft profiles.
Speaking of camshaft profiles, recent advancements in the aftermarket valvetrain industry, such as highly developed valvesprings, have allowed for the development and use of more aggressive cam designs for performance vehicles. Over the span of a year Lunati worked side by side with PAC engineers to build a valvespring that is custom tailored to the LS engine family and its specific valvetrain characteristics. The outcome is our Lunati(r) LS-series Pacaloy valvesprings, which are a perfect example of sophisticated engineering that has worked its way from concept, to testing, and then into the hands of racers.
The two areas that make our Lunati Pacaloy Beehive Springs so advanced is the proprietary Pacaloy material and beehive spring shape. Pacaloy technology was chosen by Lunati based on its high strength characteristics, superior alloy properties, and proven real world durability versus other available materials. A typical Pacaloy valvespring can handle a load 5 times as long as a spring constructed from an OE style material. This gives you exceptional fatigue resistance and long life out of your performance valvetrain setup. The beehive style was first chosen because it reduces the overall mass of your valvetrain (more rpm capability) by allowing for the use of a smaller and lighter valvespring retainer. Second, the ovate wire shape utilized in this beehive design distributes stress more evenly through the wire cross sections, making the valvespring more stable under demanding conditions. Finally, the thinner cross-section wire offers more coil bind clearance and allows for higher lift camshafts or aftermarket rocker arms. So what does that mean for LS owners? The Lunati Pacaloy Beehive Valve Spring is a must have item if you want the best performing and longest lasting valvespring available. These springs are ideal for street/strip vehicles and offer an affordable solution to upgrading your factory valvesprings.
The newest addition to the always expanding Lunati(r) line of performance oriented valvetrain products are Voodoo(r) Roller Rocker Arms. These aluminum roller rocker arms are the product of extensive testing, including special deflection and bend tests along with high-rpm simulations. Voodoo(r) Roller Rockers feature unmatched attention to detail such as high-quality aircraft grade aluminum bodies, extra-large trunnions and bearings, which allow these rockers to outperform competitors in both power increases and durability. Proven to endure more than 100,000 miles of elevated engine speeds, Voodoo(r) Roller Rockers are perfect for any enthusiast looking for a replacement rocker arm that will far exceed the quality of their OEM units as well as competitors' versions.