JESEL Valvetrain Innovation

It�s safe to say that JESEL is the originator of the modern racing belt drive system. Like most JESEL valvetrain components its belt drive was born out of necessity as NASCAR racers were experiencing frequent timing chain failures in 500-mile races. It has been refined over the years to a precise timing system that is durable enough to endure tough 24-hour races such as Daytona and Le Mans or a full-season of circle track competition. Racers have been rewarded with years of service from their JESEL belt drives by simply replacing the belt at recommended service intervals. Besides being more durable than gear or chain drives, JESEL�s belt drive systems offer a number of advantages.

- Cam timing adjustment is made externally providing the easiest and most accurate tuning available.

- Billet aluminum Spider is made from 2024-T6 and is available as a solid unit for additional strength.

- Accessories available to run distributor drives, fuel pumps or oil pumps off front of cam.

- Hard coated Billet aluminum 7075 Upper Pulley features patented High Torq Drive� tooth configuration.

- Teflon� coated high vacuum cam and crank seals.

- Patented High Torq Drive� reinforced belt operates dry and spins with less friction than timing chains or gear drives and also absorbs harmonics.

- Crank Pulley is heat-treated steel and incorporates a High Torq Drive� tooth configuration.

- Kit hardware is all Grade 8 Allen and Torx� head design.

Every JESEL belt drive system is built using the finest materials and coatings available, and is machined to precise tolerances in JESEL�s state-of-the-art CNC machining centers.

JESEL White Rhino Belts are the future of camshaft belt drives. Created from EPDM compounds, they are designed to be up to 10-times more durable, and provide longer life at higher temperatures than traditional belts.

Introduced in 2000 and proven in NASCAR and NHRA racing to reduce lifter damaging camshaft endplay.

For engine builders and racers currently running chain or gear drives, Jesel now has a cost effective alternative Camshaft Belt Drive. This drive features a solid, one piece upper pulley design that offers cam timing adjustability of � 8�. Proven standard features such as a 25mm reinforced High Torq Drive� belt, bronze thrust washers and high vacuum Teflon� coated cam and crank seals will reward the racer with years of dependable service. Camshaft belt drives reduce oil windage, they are significantly stronger than timing chains and are gentler than gear drives on the valvetrain.

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The JESEL Belt Driven Distributor eliminates timing inaccuracies due to camshaft deflection and cam-walk. A typical distributor driven by the cam gear has a history of retarding the timing at high RPM due to the camshaft twisting from torsion loads. The JESEL drive, when used in conjunction with a crank trigger and external ignition box, provides the engine builder with an accurate ignition system that does not deviate from the initial setting. It also eliminates any firewall or windshield interference and allows the engine to be set back further in the chassis. The addition of this drive allows for quicker intake manifold changes and more efficient plug wire routing. This drive can be used with a wet sump oiling system with the addition of a gear driven distributor plug sold separately.

For those racers who run both Camshaft Belt Drives along with the JESEL Front Mount Distributor, JESEL offers a Front Drive Kit that incorporates the two units into one convenient part number. This value packed combination is available for our most popular applications and requires the use of a crank trigger style ignition system.

Standard Features:
Fast and easy intake manifold changes
Isolates cam torsional deflection
More efficient plug wire routing
Much cooler mounting location
No interference with manifold runners
No interference with windshield or firewall locations