Anti Squat Rear Suspension

Making & welding the rear suspension brackets has been slow.

What is Anti Squat Rear Suspension all about?

When you plant the pedal at the lights or accelerate out of a bend, weight is transferred to the rear of the car. The front wheels lift and loose traction and the rear squats down.

To limit this, many cars incorporate a few degrees of ‘anti-squat geometry’. In the above shot, it can be seen that the rear suspension mounts taper towards the front of the car. These angles were carefully calculated. Worryingly, until I drive the car, I can’t tell if I’ve gone over the top. Too much can cause the rear end the over-steer when accelerating hard out of a bend which will be fun in the wet.

With twelve brackets needed to mount the rear A-Arms the progress was always going to be slow.

Now, add into the equation some anti-squat and every bracket becomes unique.

Aligning all these brackets so that they rotate around the same axis and keeping them perpendicular to the chassis central axis takes a lot of measuring, tack welding and adjustment.

Eight small brackets took the best part of 2 days.

Haynes Roadster Rear Suspension

Fully Adjustable Rear Suspension

I had a month out from blogging, but that didn't mean I was idle. Everything I had done on the rear suspension had been removed, re-done, then tweaked, then modified and finally mocked up before I went ahead and fully welded everything. The first problem I had was I wanted ...

Haynes Roadster Rear Upright

This isn't the standard Haynes Roadster Rear Upright. I've modified several of the dimensions to get a small degree of anti-squat. Because the chassis is 4 inches wider than stock, some of the other dimensions have changed too. I wanted the A-Arms as long as possible, so the mount holes for ...

Haynes Roadster Rear Suspension

The turnbuckle link is shown for demo purposes only and is not the real item. I've finally started the rear A Arms. I spent hours checking out tons of options but went with my first attempt. I wanted a design where I could loosen a lock nut, twist a turn-buckle ...

Push Rod Cantilever Suspension

The Push Rod Rear Suspension is almost done. With the arrival of some nearly new AVO coil-overs the big old DRZ400 motorbike shocks were consigned to the parts shelf. I know I'm into Haynes Roadsters now, but I was looking at a feature on Geoff Cousins latest creation. He's a ...

Kit Car Adjustable A Arm Suspension

The http://speedwaymotors.com A Arm set-up above, is designed for oval track racers. The ball joint mount (top of picture) can be moved both closer to the front or rear of the car and out-wards or in-wards. One of the ball joint mounts is a threaded stud and the ...

Kit Car Push Rod Suspension

The Push Rod rear suspension is now being mocked up - ready for assembly. The rear hubs will be removed a welded on a jig as will the upper and lower arms. Although much work has been done; powder coating parts, assembling the brand new c.v. joints, shafts and ...

Kit Car Rear Suspension Mounts

The decision was made not to make a suspension jig for the rear brackets. It was slow work and I have burnt fingers, but I'm pretty chuffed. I was going to make a suspension jig on the bench, where I could carefully measure, then re-measure every bolt hole, bracket and ...

Haynes Push Rod Suspension

The rear suspension features rising spring rate, pushrod suspension. It's all mocked up here with dummy push rods etc. Read more here. The idea being, the more the car rolls, the higher the spring rate seen by the wheel. It's what the formula 1 boys do. However, here are my problems: ...

Translate »

Web Design by Go Web Solutions