Cal Trac Bar Installation In Bexar
Description
Form popularity
FAQ
CalTracs: Accept No Substitutes! Patented Traction Bar system with designs for axle above or below springs. Bolt on kits for nearly every leafspring application. Hooks your vehicle, especially on hard acceleration, even in the dirt! Improves consistency and 60-foot times.
The pivot at the front leaf eyelet then forces the pin riding on top of the springs downward into the spring pack itself. This downward force of the pin on the leaf springs causes down force on the entire axle assembly and pushes your tires down onto the pavement/dirt.
Calvert Racing, Inc.
The traction bars do really have a positive impact on your traction. The reduction in 60 ft. times is real. However...it takes a little getting used in tight corners, pulling in to parking spots, in and out garages, sharp turns, etc.
In addition to improving consistent 60-foot times, Calvert Racing's patented CalTracs eliminate axle rotation AND improve traction, especially on hard acceleration.
Calvert notes that its split mono leaf springs are designed to control and reduce excessive body separation in rear suspension and they can plant the rear tires without unloading. They're also considerably lighter than factory leaf springs (especially multi-leaf designs).
Pinion angle is the key. Once you have the traction bars installed you'll want you pinion angle to be negative 2.5 to negative 3-5 degrees.
Either way, you are ultimately looking for pinion angles of 1-2 degrees above the drive shaft angle in the front and 1-2 below drive shaft angle in the back. Theoretically zero is perfect, but the offset allows for axle wrap (twist) under power.
Most driveline companies recommend operating angles of 3° or less for maximum u-joint life. There should be a minimum of ½° to allow the needles to rotate. The higher the operating angle, the more likely your vehicle will develop a vibration at high driveshaft speeds.
The harder you're on the throttle, the harder the downward force on your tires. While many believe that CalTracs are strictly for drag racing applications, a properly adjusted CalTracs setup could improve traction for just about any application, including heavy towing, off-roading, even daily driving.
