Menu

Shop

Garage

Cart

Account

Products to Compare (max of 3)
X
Compare These Parts

Tech Talk Sprint Car Rearend Squaring

12/12/2018
Add Article To List

Jason Martin shares his 15+ years of experience to help racers learn how to square the rear end of a sprint car. Rear axle assembly can be difficult, but Jason is here to help simplify the process.

To begin, set the rearend on six-inch blocks, then make sure the car is level. Place your level at the front of the car, close to the motor. Once everything is level, use a wide, strong tape measure to make sure that the rear axle is 38 and 5/8 inches on the right side. This is the standard measurement, but some cars may vary slightly. Then, follow the same steps on the left side. The most important rule for squaring a car is that the back axle is square to the motor plate, and the front axle is squared to the motor plate.

Once those steps are completed, it’s time to level the birdcages. Since your frame is level, put the angle finder on top of the Eagle birdcages where it's flat. Rotate it until it’s in between zero and two degrees. Then take the bolt from the lower birdcage flag and put it through the heim. You can rotate the heim to adjust if needed.

A great way to double check that everything is set correctly, is to make sure that the rear arm and torque ball move freely.

The next step is to set the jacobs ladder length. Rotate the jacobs ladder up, to see if the pin fits. If it doesn’t, rotate the heim until the pin easily slides in.

After that, measure one final time to ensure accuracy. Triple check with the angle finder and feel that the rear arm and jacobs ladder move freely. Then, tighten the jam nuts for the radius rods, rear arm and jacobs ladder. Finally, screw in the bolt for the stop on the bottom of the birdcage flag. We hope this video was helpful! Thanks for following along!

Products Featured in this Article

Related Articles

Tech Talk Sprint Car Front End Squaring
12/18/2018
Jason Martin explains how to square the front end of a sprint car. He walks through the step by step process of squaring the front axle, adjusting the radius rods and setting the side to side. Check it out!
Engine Build and Dyno - 410 Sprint Car Build
by Joe McCollough - Posted in Videos
1/15/2021
Our sprint car is back, and it's ready for some power. Follow along as Speedway Motors Racing Engines puts together a thundering 410.
Wheels and Tires - 410 Sprint Car Build
9/9/2019
We’re putting Weld Racing Wheels and tires on our 410 Sprint Car and finally dropping it on the ground. Check it out!
Shocks - 410 Sprint Car
by Speedway Tech Team - Posted in Tech
9/6/2019
Today, we're following along as Jason Martin builds the Pro Shocks for our sprint car and installs them. There's lots to learn from this episode!
Brakes - 410 Sprint Car Build
by Speedway Tech Team - Posted in Tech
8/28/2019
Check out the 410 sprint car brake installation and bleeding the brakes! We're making serious progress on our build.
Rear Axle Installation - 410 Sprint Car Build
by Speedway Tech Team - Posted in Tech
7/24/2019
Check out our 6th episode of the 410 Sprint Car Build series. Last time we assembled the rear axle and now we are installing it!
Rear Axle Assembly - 410 Sprint Car Build
by Speedway Tech Team - Posted in Tech
7/24/2019
Learn how to assemble a rear axle assembly as we put together ours for the 410 Sprint Car Build. Our team of builders continues to make progress on the car!
Seat Installation - 410 Sprint Car Build
7/17/2019
Check out the process of installing the full containment seat and seatbelts in episode 4 of the 410 Sprint Car Build series.
Steering/Gauges - 410 Sprint Car Build
by Speedway Tech Team - Posted in Tech
7/10/2019
Today, the power steering gear and gauges are being installed on our 410 Sprint Car Build by team Fricke.
Brake Lines/Motorplate Installation - 410 Sprint Car Build
7/5/2019
Learn how to install the floor plan, brake lines, and motorplate in a 410 sprint car as we launch our 410 Sprint Car Build.
Error
X
Note
X
Ok