Leaf Spring Pinion Angle For Drag Racing

Sometimes people increase the pinion angle to even increase dragstrip bite.

Leaf spring pinion angle for drag racing.

When asked the question of how a leaf spring suspension is different than a 4 link ron rhodes says we can t change our instant center and it s an arched spring versus a coil spring. This can lead to binding of the u joints as the suspension reacts and will hurt traction. When you measure your driveshaft angle e g 1 5 degrees down and the pinion angle e g 3 5 degrees up in the opposite direction adding the two together represents 5 degrees total negative pinion angle. Unequal length four link cars will see as much as four to five degrees in relation to the crank find a buddy with a leaf spring suspension and a temperature gun.

They say to add as much as 4 5 beyond what would. Keep in mind that with suspension movement the operating angle will increase but should not exceed a few degrees. This can lead to binding of the u joints and will hurt traction and break driveline components. According to bickel a ladder bar suspension normally requires degree of pinion angle a four link requires 1 2 degrees and a leaf spring suspension requires up to 6 to 7 degrees.

A typical leaf spring rear suspension needs roughly 5 7 degrees of negative angle pinion pointing down. With a conventional leaf spring suspension pinion angle adjustments are made with shims between the axle housing and the anchor pl ate to adjust the pinion higher or lower. The car must be setting on all four tires inflated to race pressure. The typical leaf spring rear suspension will need 5 7 degrees of negative angle.

This is when the yoke of the rearend is tilted upward more than the driveshaft. If the parallelism of the centerlines changes the u joints travel at uneven operating velocities causing vibration this is the same problem induced by poorly phased end yokes. A reasonable amount of fuel should be in the tank typically half full. Equal length four link bars run one to two degrees down in comparison to the crank angle.

For leaf spring cars the pinion cl is set between 5 7 degrees down in comparison to the crankshaft angle keep your temperature gun handy ladder bar cars normally run three degrees down in relation to the crank. In most factory production cars to. My understanding is that with leaf springs you are supposed to factor in some amount of additional negative angle at your pinion to account for leaf spring axle wrap under acceleration load. But does the pinion angle really have an effect on traction.

You never want the rearend setup with positive pinion angle. A ladder bar or 4 link setup is much more rigid and therefore usually only needs 1 3 degrees. Problem is 99 of what i ve read seems to be meant for racing applications. Leaf spring pinion angle for drag racing masuzi february 26 2020 uncategorized 0 pinion angle and traction racingjunk news drag racing traction rear suspension pinion angle measurement guide to setting pinion angle.

I m about to weld leaf spring perches to my new axle housing in my 64 f100.