ALTA innovation is clearly evident with the PSRS!

The MINI has very minimal adjustments to the front suspension, toe in or out only. ALTA has seen tremendous benefits from changing the levels of caster in the front. This increase in caster allows sharper more precise response from steering input. Decreases understeer and improves overall feel.

Also, the OEM lower control arm bushings supplied from MINI are a very gooey like rubber compound. While great to reduce road noise, they are miserable at improving handling. As a result even the most minor of imperfections in the road surface can cause the car to dart around. The ALTA PSRS uses a firm bearing material that prevents this. This inspires confidence in all driving conditions, and again adds positive steering response.

For more detailed information on the PSRS, click on the “Features” tab directly to the right of this one. If you have questions or concerns PLEASE feel free to e-mail or call us. Thanks in advance for choosing ALTA!

What is the PSRS? 

Positive Steering Response System is what it stands for.  The PSRS replaces the front control arm rear bushing.  This OEM bushing is designed to be extra compliant to reduce NVH, and make the ride more comfortable. The compliancy of this bushing is not something a performance oriented driver is looking for. 

OEM Bushings Installed

Under braking, this OEM bushing has enough flex in it to cause the wheel to move back and forth .500"!  This deflection of the wheel causes drastic toe in and toe out changes under braking.  These toe changes will cause steering input changes, cause the tires contact patch to change, and even wandering.  

When accelerating, this OEM bushing causes unwanted wheel hop, and again toe in and toe out changes.  During acceleration, the car will want to follow the ruts in the road, as the bushing flexes back and forth. This is one of the most noticeable changes when going with our PSRS.

PSRS Installed

Under braking after the ALTA PSRS is installed, the wheel will not move front to back period!  Since there is no way for toe changes to occur, the steering feedback issues and wandering under braking all go away!  

Under acceleration after the ALTA PSRS in installed, wheel hop disappears and the car will have far less tendency to follow the ruts in the road. In turn, the car will have more front end traction.

Adds Caster

Besides removing all the unwanted flex of the OEM bushing, our PSRS has an offset to where the bushing is mounted. This allows the installer to add 0-1.5 degrees of caster to the front suspension. Caster is the angle at which the steering knuckle rotates on.  Adding caster makes the car turn in faster by providing a larger contact patch as the wheels turn on the steering axis. Think of it like camber for your steering!   

Anti-lift feature 

One of the byproducts with how we add caster is the ability to add some Anti-lift to the front end. Depending on how much caster is being added, some Anti-lift can be added to the car. This reduces the amount of front end lift during acceleration. The benefit to Anti-Lift is it keeps the balance of the car in check.  During hard acceleration, Soft springs, and shocks makes the cars weight shift to the back. This in turn removes weight from the front that keeps the tires planted to the ground. Which is a very important thing when you have all that power going to the front wheels!

• 2 PSRS Bodies
• 2 Stainless Steel sleeves
• 2 Ball Pivots
  
• 12 Allen bolts
• 2 stickers

NOTE FITS ALL COOPER AND COOPER S MODELS

2002-2007 R53 STYLE

2007+ R56

Quotes taken form Motoring Underground MINI forum

Canyon Motorsports

SCCA Proffesional driver

"I have been running & testing these bad boys on the race car since August, with great success.

Some benefit's I have observed:
1. Much more stable handling.
2. The steering wheel returns to center easier after a turn.
3. Much more stability under hard late braking."

 "............PSRS Installed
Under Braking, after the ALTA PSRS is installed, the wheel will not move front to back period! Since there is no way for toe changes to occure, the steering feedback issues, and wondering under braking all goes away!

Under Acceleration, after the ALTA PSRS in installed, wheel hop disappears, the car will have far less tendency to follow the ruts in the road, and in turn the car will have more front end traction. "

 

 
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