Suspension Geometry Kit
Suspension Geometry Kit
Based on extensive study of the geometry of the 90-99 SW20 MR2 suspension, the Wilhelm Raceworks Suspension Geometry Kit is designed to correct the negative effects of lowering, and to improve on the stock geometry by reducing dynamic toe (aka bump steer) and adjusting the roll axis of the chassis. The result is significant improvements to turn-in and front end grip, while also reducing the oversteer tendency that the SW20 is so known for. The kit also makes it much easier to catch or control oversteer once it starts.
Made in the USA!
Description of Options:
Short tie rods are typical for US market '91-'92 cars, or '90-'91 in the rest of the world. Long tie rods for US '93+ cars, or '92+ elsewhere. Please double check your cross member before ordering, a previous owner may have changed it!
High misalignment rod ends highly recommended for stock struts due to
large droop travel. With most aftermarket coilovers either front rod
end may be used. See instructions here for how to measure droop to verify which rod end you need.
Suggested Alignment Settings
1/16" (1.6mm) total front toe in
1/8" (3.2mm) total rear toe in
-2° camber (front and rear) for street use
-3 to -3.5° camber (front and rear) for track and autocross
Additional Technical Info (Click Here)
This kit improves the MR2's suspension geometry in several ways. First, it corrects the negative effects of lowering. As discussed in my suspension geometry analysis, lowering the MR2 (or any McPherson Strut based vehicle) has negative effects on the suspension geometry. In particular, lowering degrades the camber curves and excessively lowers the roll centers, resulting in more body roll. The kit is designed to fully compensate for 1.25" of lowering. However, lowering further than that will not negate the effects of the kit. If anything, the lower your car is the more you can benefit from geometry correction.
Second, the front RCAs are thicker than the rears. This raises the front roll center above the rear resulting in improved turn in AND improved rear end grip.
Third, significantly reduced rear toe change on a Rev1 (91/92) MR2. I have found this to have a significant positive affect on stability at the limit, making the car much easier to drive fast, and consistently. With this adjustment I run my 91 at 1/8" total toe in with no loss of stability, leading to greatly improved rear tire wear. On the Rev2+ cars the kit restores the stock toe curve, which is otherwise significantly altered by lowering the car.
This kit is designed to be bolt-on, and completely reversible. A little work with a press is required on the rear knuckle.
All kits use 3-piece, USA made FK rod ends.
This kit requires at least 16" wheels. The rear may require 17's,
depending on the exact shape of the wheel. The stock brake dust shields
will need to be modified (bent) or removed to clear the front ball
joint / RCA.
High Misalignment (60)