This Haynes Roadster has parts from many makes and models of cars: Ford Sierra 4×4 Cosworth, Scorpio, Jaguar X type, Austin Ambassador, Citroen BX, Mercedes SLK etc.
Getting the dimensions correct for this custom Ford Sierra Upright hasn’t been easy. The reason for making a new upright was the steering arm on the standard upright being wrong for my particular application. Therefore getting the next stage right is very important.
I’ve been boxing in one of my custom Ford Sierra Front Uprights. They are made from solid EN3B steel along with 3,8,12mm steel plate.
I had to enrol the skills of the ‘brother in law’ to TIG weld the new Ford Sierra based front uprights.
This is not a DIY Sierra brake upgrade, more of a complete re-think. A set of W220 Mercedes callipers came up for less than Β£25 (inc. delivery).
Ackermann angle geometry is a tricky subject and often over simplified.
If you swapped uprights from one side of the car to the other the Ackermann Angle would be very wrong.
The Ford Sierra upright can be modified to from a MacPherson Strut to an upright for an A-Arm setup. The top ball joint is from a Ford Transit van, as per the book by Chris Gibb. The top ball joint…
I used Sierra uprights with standard mushroom top hat adaptors. Using a medium Swing Arm radius (itβs going to be a daily driver) and a top arm closer to 2/3 the length of the bottom arm, I came up with…
For the modified Ford Sierra setβup I used : Modified Sierra uprights. Mushroom top hat adapters. McSorley 442 chassis with suspension mounts similar to Locost. 195/45/15 β Diameter 556mm. β1Β° camber. Chassis to ground clearance 150mm. Front track 1452mm. Β»…
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