PERRIN EVO Positive Steering Response System......
#47
If we thought people had money to burn they would be a lot more. But GTworx is correct, machined housings, special Teflon lined Spherical bearings, and SS hardware. For what it is, we feel it is pretty fair. But as they get more popular you will see prices drop a bit.
#48
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This product unlike the subi ALK kit doesn't change the suspension mount to achieve the geometry change. The problem with the subi ALK kit (as I remember it) was that the change in suspension geometry was achieved by changing the stock suspension mount, illegal in ST, SP and SM as a result.
I don't see any changes in the mount on the EVO kit, only the bushing.
#49
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If we thought people had money to burn they would be a lot more. But GTworx is correct, machined housings, special Teflon lined Spherical bearings, and SS hardware. For what it is, we feel it is pretty fair. But as they get more popular you will see prices drop a bit.
How many miles do you expect these bearings to last with proper care and maintinance?
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You know, you're right ![Smilie](https://www.evolutionm.net/forums/images/smilies/smile.gif)
From Street Mod Rules:
I think this product should be good to go for SM/SM2.
If Perrin made a version of this without extra metal in the bushing, it would be good to go for SP, as I interpret the rules:
From the Street Prepared Rules:
(emphasis added by me)
![Smilie](https://www.evolutionm.net/forums/images/smilies/smile.gif)
From Street Mod Rules:
I think this product should be good to go for SM/SM2.
If Perrin made a version of this without extra metal in the bushing, it would be good to go for SP, as I interpret the rules:
From the Street Prepared Rules:
(emphasis added by me)
that is correct sir...
![Beer](https://www.evolutionm.net/forums/images/smilies/beer05.gif)
the big question is, can we stop raising the inside rear with this geometry change.
#51
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the change in geometry should be ok as long as you maintain the same ratio of metel & non-metel material in the replacement. that's the hard part.
This product unlike the subi ALK kit doesn't change the suspension mount to achieve the geometry change. The problem with the subi ALK kit (as I remember it) was that the change in suspension geometry was achieved by changing the stock suspension mount, illegal in ST, SP and SM as a result.
This product unlike the subi ALK kit doesn't change the suspension mount to achieve the geometry change. The problem with the subi ALK kit (as I remember it) was that the change in suspension geometry was achieved by changing the stock suspension mount, illegal in ST, SP and SM as a result.
Okay, Subaru time over....
![lol](https://www.evolutionm.net/forums/images/smilies/lol.gif)
So anyway, Perrin shouldn't need to make a version that is zero offset, as that's not the issue.
A version that simply used a standard poly or rubber bushing instead of the spherical bearing would make a lot of people happy. It would also alleviate the concerns of anyone turned off by the possible NVH or longevity issues with the spherical bearing.
So I vote for a poly or rubber bushing version with the same offset of the spherical bearing one.
![Smilie](https://www.evolutionm.net/forums/images/smilies/smile.gif)
- Andrew
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Would these help keep the steering wheel steady while driving? Since puting on 18's My steering wheel sometimes goes back and forth a little while driving on bumpy roads. What do you think?
#57
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before dumping more money, you should check to make sure that you are not running your car too low. If it's slammed, then chances are that raising the ride height (affects the roll center) and a proper alignment will solve the problem as well.
#58
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Another problem is if they get dirty(inside) or are poorly machined as with some cheap ebay parts
#59
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Part of that is due to the fact that spherical bearings are not intended to be side loaded as they are in a tophat. This is much harder on them as they can take a higher strees load if standing upright like this perrin unit. You will notice on many race cars, they use eye mount shocks which turn the monoball on its side
Another problem is if they get dirty(inside) or are poorly machined as with some cheap ebay parts
Another problem is if they get dirty(inside) or are poorly machined as with some cheap ebay parts
With the perrin units I am most concerned about dirt, not any overly aggressive side loads that I encountered with my ground control camber plates.
it would be nice to see a cute little rubber bootie covering that exposed bearing
![Thumbs Up](https://www.evolutionm.net/forums/images/smilies/smilie_thumbsup.gif)
#60
the change in geometry should be ok as long as you maintain the same ratio of metel & non-metel material in the replacement. that's the hard part.
This product unlike the subi ALK kit doesn't change the suspension mount to achieve the geometry change. The problem with the subi ALK kit (as I remember it) was that the change in suspension geometry was achieved by changing the stock suspension mount, illegal in ST, SP and SM as a result.
I don't see any changes in the mount on the EVO kit, only the bushing.
This product unlike the subi ALK kit doesn't change the suspension mount to achieve the geometry change. The problem with the subi ALK kit (as I remember it) was that the change in suspension geometry was achieved by changing the stock suspension mount, illegal in ST, SP and SM as a result.
I don't see any changes in the mount on the EVO kit, only the bushing.
how durable is this product? My biggest concern with buying this kit is the longevity of the spherical bearing. I have run many different camber plates and strut tops on my daily driven cars, and I also live on some fairly rough roads. With my ground control camber plates I was getting maybe 30k miles before I needed to replace the bearings.
How many miles do you expect these bearings to last with proper care and maintinance?
How many miles do you expect these bearings to last with proper care and maintinance?
Exactly....the ALK for Subaru changes the mounting point of the rear of the front control arm and that's why they are illegal. The changing of the mounting point isn't the part that added caster either, that just affected anti-lift/dive. The part that adds caster is the offset bushing itself within the housing of the ALK. Whiteline actually makes the offset bushing available seperately that adds caster and is auto-x legal.
Okay, Subaru time over....![lol](https://www.evolutionm.net/forums/images/smilies/lol.gif)
So anyway, Perrin shouldn't need to make a version that is zero offset, as that's not the issue.
A version that simply used a standard poly or rubber bushing instead of the spherical bearing would make a lot of people happy. It would also alleviate the concerns of anyone turned off by the possible NVH or longevity issues with the spherical bearing.
So I vote for a poly or rubber bushing version with the same offset of the spherical bearing one.![Smilie](https://www.evolutionm.net/forums/images/smilies/smile.gif)
- Andrew
Okay, Subaru time over....
![lol](https://www.evolutionm.net/forums/images/smilies/lol.gif)
So anyway, Perrin shouldn't need to make a version that is zero offset, as that's not the issue.
A version that simply used a standard poly or rubber bushing instead of the spherical bearing would make a lot of people happy. It would also alleviate the concerns of anyone turned off by the possible NVH or longevity issues with the spherical bearing.
So I vote for a poly or rubber bushing version with the same offset of the spherical bearing one.
![Smilie](https://www.evolutionm.net/forums/images/smilies/smile.gif)
- Andrew
But i think you are bringing up the point that we are not changing the control arm mounting point(in the suby we are because it mounts differently). Just the control arm position. Because of this, it might be ok for some classes.
Part of that is due to the fact that spherical bearings are not intended to be side loaded as they are in a tophat. This is much harder on them as they can take a higher strees load if standing upright like this perrin unit. You will notice on many race cars, they use eye mount shocks which turn the monoball on its side
Another problem is if they get dirty(inside) or are poorly machined as with some cheap ebay parts
Another problem is if they get dirty(inside) or are poorly machined as with some cheap ebay parts