DRB GT40 Bumpsteer graphs

[Dave S]

I wheel aligned my DRB GT40 on weekend and while on the wheel alignment
machine I noted the following bumpsteer changes over the suspension travel
of the vehicle. The wheel aligner I used is a Biessbarth ML4600. I am trained
to use this machine ,but I am no expert when it comes to suspension.

The results I have only relate to my car and may not apply to other DRB's
as they maybe set up differently or I may have also set the car up incorrectly.

After setting caster/camber/ toe to what i thought was a good
initial starting point (sports driving), I removed the springs from the shocks and cycled the suspension through it's full travel taking measurements
every 20mm or so ,front and rear.

When it came to the rear bumpsteer I found that adjusting the caster
did make improvements, but only to a certain point (approx 3.5 degrees) then increasing it anymore reversed improvements made.

[Trevor Booth]

I hope that is 0.6 to 0.7 mm of toe in and not 6 to 7mm

Zero to 20 minutes is more the go