At the next picture you see the mark up line from the rear suspension and the plumb line that drops from the bottom ball joint.
We us the ball joint, because we know that this point will not move in relation to the “trust line”

The next picture shows how to use the “bob line” and where to put it.

I hope these make things clear. So check it at your Cobra and see if you have differences at the left of right side.
Both side dimensions should be equal, if not we need to do some adjust.
How to adjust? Where to adjust?
We need to adjust at the mounting point between the bottom fulcrum shafts of the differential and the frame.

Most of the kits will have the shafts anchored to the frame at this point and the top 4 bolts.
Remember we didn’t fix the 4 top bolts, which is to make the job easy.

So if you measurement at the right side a short distance compared to the left side we need to put some shims at the right side bottom fulcrum shaft.
(Remember between the shaft and the frame)
The shims dimensions are as follow.
Outside diameter = 50 mm
Inside diameter = 22 mm
Thickness will depend of the difference in measurement.

REAR CAMBER
We need to measure the angle.
Here we have made a tool that you can use to have accurate fine angle measurements.

To adjust, you need to use the special shims from Jaguar that would be mounted between the drive shaft and the brake disk.
Each shim is 0.6 mm and will change the angle by 15’ or ¼°

FRONT CAMBER

HERE YOU CAN DOWNLOAD A FULL SIZE DRAWING TO MAKE YOUR OWN TOOL.
http://www.donostia.demon.nl/figure4.png
Just print on a photo quality paper and glue it to an aluminum plate.
See this picture above for how it looks.

COBRA289

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The AC Cobra Replica Site

People that have visited this page from 20-Dec.-03

Revised at 14 - June.-2007

Alignment 02

REAR TRUST LINE
Here is a big rule!!!!!!!!!!!!!!!!!!!

THE REAR SUSPENSION LINE WIL DETERMINE THE DIRECTION WHERE YOU COBRA WILL GO.
Here we need to be very meticulous with the measurements.
What we want to achieve here is that the rear suspension is parallel to the front suspension and that perpendicular is to the main car center line. (Trust Line)

We need to measure here the distance front the rear wheel to the front wheel and both sides should be the same.

We do that via the next method.
At the rear you have the wheel nut and shaft, pick here the center point. The other point at the front wheel would be the bottom ball joint.
Why those points? It is because those are fixed and will not move in the front or rear direction.

For those of you lucky guys with a magnetic laser, you can work as next.
Put you laser at the rear wheel flange and project the beam to the front use a long ruler (aluminum angle bar) that joint both front bottom ball joints, measure the distance between the laser beam and the bottom ball joint.

Here are some illustrations when the trust line is set by a “Laser Level”
The Laser used need to have magnets at the base so that our hands are free.

The next picture shows the laser at the rear wheel flange.
At the floor you can see a set of markers lines done by me, these are the position of the Laser dots when we rotate the wheel flange.
Also you can see the red dot of the laser and the aluminum angle bar to draw the line to the front suspension.