[blkfrd]

I'm getting involved in this discussion late in the game and this may have already been said more or less.

Assuming that Cal Tracs just prevent spring wrapup like underriders or traction masters is a mistake. Cal Tracs start where underriders leave off. They take the energy created to prevent spring wrap and turn it force to improve traction.

Here is a writeup on Caltracs:

The combination of these components changes the pushing point on the car by redirecting the turning action (spring wrap-up) of the rear axle through the Force Transfer Link into the Front Pivot. The Front Pivot Spring Stop Bolt resists this turning motion and also controls the bending of the leaf spring at its thinnest section. The push into the Front Pivot helps the cars weight shift towards the rear of the car because of a new directed angle of force toward the front of the vehicle. (The "Instant Center" moves farther forward). This is where the system emulates a Four link system. The pinion angle is also maintained.

[brianj5600]

Originally Posted by 2+2GT

....too bad the autofocus nailed the fence instead of the board.....

I did not edit the end when the camera was pointed down to leave the audio of the announcer. Here is the timeslip from that pass. Car #56

Originally Posted by 2+2GT

....Looks like you have all the rear rubber geometry will allow- How do you avoid contact with the wheel well?

They only hit when I am loaded down for the track. I carry a small generator, fan, toolbox, tuning parts, ice chest, laptop, chairs, etc. The extra weight causes slight touching of the tire to the quarter. When I buy axles, I will shorten the housing a quarter inch and that problem will go away.

[ron67fb]

I don't know about you guys but I'm gonna weld my tie-rods and control arm shims on once it's aligned.

[2+2GT]

Originally Posted by ron67fb

I don't know about you guys but I'm gonna weld my tie-rods and control arm shims on once it's aligned.

Hmm… I'm not sure I share your optimism.