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In addition to improving consistent 60-foot times, Calvert Racing's patented CalTracs eliminate axle rotation AND improve traction, especially on hard acceleration.
CalTracs are a patented traction bar system designed to solve major issues with Leafspring Suspensions in drag racing or other hard acceleration, such as axle wrap, wheel hop, and wheel spin on take off.
Caltracs allow the axle to move still but NOT wrap. this "give" so to speak can be the difference in getting a truck to hook and not hook on a track.
Track bars are designed to prevent unwanted lateral movement of your vehicle's axle assemblies.
Traction bars are mounted from the rear axle to the frame which doesn't allow the axle to move a lot, this prevents wheel hop and leaves everything where it should be.
By cleverly controlling the position of the rear axle, traction bars significantly reduce the bounce, keeping the rear suspension from excessive movement. This results in a smoother, safer, and more controlled ride, improving the driving experience substantially.
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 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.
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).
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.