Jesel - 40 Years of Valvetrain Innovation

You need 10,000 rpm? How about 11,000?
It is amazing while watching NASCAR and other forms of Racing on television and you get to see the on-board telemetry showing rpm, speed, engine temps and braking. The most amazing information to knowledgeable fans is that these teams are spinning their engines in excess of 9,500 rpm for 500 miles. No hi-tec, overhead cam engines here, just plain old pushrod V8's, revving reliably upwards of 10,000 rpm lap after lap. Drag racers are also breaking the 10,000 rpm barrier with 500 cid Pro Stock engines exceeding ten grand on every shift, placing incredible demands on the valvetrain, especially when you consider the huge valves and 1,200 pound valve spring pressures required to make these power levels.
Jesel

Jesel Rockers
JESEL Products Setting the Standard
Dan Jesel has dedicated 40 years of his life making high rpm pushrod engines a reality. When you look at the basic pushrod race engine, not much has changed with the exception of breakthroughs in valvetrain and cylinder head design. Dan's key innovations in stock rocker systems, roller lifters and belt drives have made these extreme engine speeds possible. Take JESEL's J2K shaft rockers for example. The single rib MoHawk design is the lightest stiffest and strongest rocker available. It allows higher rpm without increasing spring pressure. Dan also realized the weakest link in the system was not the shaft but the lower strap on the rocker body, so he decreased the shaft diameter and increased the lower strap thickness on the rocker. He further strengthened the rocker by eliminating the counter bore for the pushrod cup by using ball-end adjusters. It is this type of constant innovation that keeps JESEL out in front of the competition.
Similar innovation has been incorporated in JESEL's roller lifters. pressurized internal oil circuits, exotic metals, proprietary coatings and machined tolerances held to ± .0002" are just some of the technology packed into JESEL roller lifters. They are simply the lightest and strongest roller lifters on the market. The same goes for JESEL belt drives. New belt drives come on the market every day surrounded by wild claims. But when it comes to the serious business of winning racers and chasing championships, more Nascar and NHRA Pro Stock teams depend on JESEL'S proven technology than all other makers of valvetrain products combined.

JESEL Innovation
What makes JESEL different than other valvetrain companies? Without a doubt it is Dan Jesel. Dan is the driving force behind all that JESEL does. he is constantly coming up with innovate ideas such as the MoHawk rocker, low friction ball type adjusters, lightweight Keyway roller lifters and belt drives that will survive a 500 mile NASCAR race, or 24 hours at Le Mans. More recently he designed and patented the double roller cam followers for the Modular Ford and Ecotech overhead cam engines. Subtle design features such as the "nested" rollers in the Ecotech followers are classic JESEL innovation. Dan's latest projects include valvetrain systems for race and hot street Harleys and a valvetrain for NASCAR racers that is stable in excess of 11,000 rpm. How does all this come about? Dan and his engineers spend thousands of hours designing and testing parts in JESEL's R&D center, which includes a state of the art Spintron machine and a Superflow dyno to validate new concepts and test components for durability.
Jesel Lifters

Jesel Belt Drives
Why JESEL?
A large part of the JESEL innovation story is how JESEL valvetrain components are made. It starts with the quality control room that inspects raw materials as they come through the door. A Beckman SS VI Spectrometer tests the chemical makeup of metals down to parts per billion. Optical microscopes are used to examine the microstructures of alloys, and micro hardness testing is done to accurately check the surface treatment of steel alloys. JESEL takes its quality of raw materials and heat treatments very seriously.

After the raw materials pass this tough inspection process they are machined into finished products on the most sophisticated CNC machines avauilable. Rigid inspection techniques are used for quality control such as the Optical Comparator Microscope that is a true stereo (simultaneous dual image) comparator microscope. This digital imaging system is used primarily to inspect the radiused surfaces of pushrods and adjusters, but can be used for any type of silhouette projection and coordinate measurement. These extreme checks and balances ensure that race teams will not experience failures due to variances in materials or machining processes.

Because JESEL uses the most advanced CNC machines available its production capability is the most efficient in the industry, bringing prices down to affordable levels for the highest quality parts. When you realize all of the engineering and quality that JESEL builds into its products, it's hard to argue against their value, and the peace of mind that comes from using championship proven components.

  Click Here for more information on Jesel Rockers, Lifters and Belt Drives