What is the ALTA PSRS? & A $pecial for NAMers
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What is the ALTA PSRS? & A $pecial for NAMers
Its a good thing, but all day long we get questions about the PSRS...
What is it?
What does it do?
Is it a race only part?
Positive Steering Response System
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.
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 wondering.
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
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.
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!
Now that you have read ALTA's view on this part...............
Here is a link to one reason you MIGHT consider the PSRS as one of your mods.
Lastly here are a few quotes from active NAM members that have experienced the ALTA PSRS first hand. (You can find more posts and quotes on the ALTA PSRS by simply typing "PSRS" into the search function.
Vader – “In terms of performance, they really stabilized the front end as advertised. I have no regrets with this purchase.”
Bean – “i love it. i have a pretty aggressive alignment and the car was "twitchy". with the alta PSRS, the car is much better in a straight line or high speed sweepers. i've had it on my car for almost a year (5 track weekends). if you want to go fast, you need this!”
Bean – “Beckett's Bend, at Sebring is a long, fast left-hander that can be run flat in a MINI. one steering input at the beginning of the turn, then hang on. i usually exit that turn at about 113 mph. i was able to do 102 mph with slicks on a wet track. the PSRS makes this a much more comfortable event. this wouldn't be the first suspension mod that i made, but it becomes almost necessary after other work is done and speeds are higher. my front end doesn't roll side to side!”
Dr_Obnxs – “The front end is much more planted and "connected" for sure. Accelerating and braking are both more controlled.”
Vader – “I wasn't on your list but I now have 1000 miles and a three day DE with the PSRS installed. I was hoping they would stop the back and fourth movement I was getting under hard braking. I'm talking seriously hard 120mph to 30mph threshold braking. Problem solved. Turn-in is better. Front end is solid. I can't find anything bad about these. I'm very happy that I put these on my track car.”
Blumini – “PSRS removes the big rubber bushing and replaces it with a precision spherical bearing. If your car is "slammed" then you're already riding extremely harsh. The PSRS won't make things any worse, just more precise.”
For those of you that took the time read my ramblings above you have a limited time to take advantage of a SUPER Schweet Cool Guy Deal on the ALTA MINI Performance web site!
What is it?
What does it do?
Is it a race only part?
Positive Steering Response System
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.
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 wondering.
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
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.
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!
Now that you have read ALTA's view on this part...............
Here is a link to one reason you MIGHT consider the PSRS as one of your mods.
Lastly here are a few quotes from active NAM members that have experienced the ALTA PSRS first hand. (You can find more posts and quotes on the ALTA PSRS by simply typing "PSRS" into the search function.
Vader – “In terms of performance, they really stabilized the front end as advertised. I have no regrets with this purchase.”
Bean – “i love it. i have a pretty aggressive alignment and the car was "twitchy". with the alta PSRS, the car is much better in a straight line or high speed sweepers. i've had it on my car for almost a year (5 track weekends). if you want to go fast, you need this!”
Bean – “Beckett's Bend, at Sebring is a long, fast left-hander that can be run flat in a MINI. one steering input at the beginning of the turn, then hang on. i usually exit that turn at about 113 mph. i was able to do 102 mph with slicks on a wet track. the PSRS makes this a much more comfortable event. this wouldn't be the first suspension mod that i made, but it becomes almost necessary after other work is done and speeds are higher. my front end doesn't roll side to side!”
Dr_Obnxs – “The front end is much more planted and "connected" for sure. Accelerating and braking are both more controlled.”
Vader – “I wasn't on your list but I now have 1000 miles and a three day DE with the PSRS installed. I was hoping they would stop the back and fourth movement I was getting under hard braking. I'm talking seriously hard 120mph to 30mph threshold braking. Problem solved. Turn-in is better. Front end is solid. I can't find anything bad about these. I'm very happy that I put these on my track car.”
Blumini – “PSRS removes the big rubber bushing and replaces it with a precision spherical bearing. If your car is "slammed" then you're already riding extremely harsh. The PSRS won't make things any worse, just more precise.”
For those of you that took the time read my ramblings above you have a limited time to take advantage of a SUPER Schweet Cool Guy Deal on the ALTA MINI Performance web site!
Last edited by ALTA_JOHNL; Aug 26, 2010 at 01:14 PM.
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