Anybody tried replacing the rear spring for the pss9? I'm thinking about increasing the spring rate in the rear. Just wondering if anybody have done it, or know the lengh and diameter of the spring.

Cheers.

 

It's probably printed on the spring and should be metric. There may be 3 numbers listed; length, diameter, rate. Diameter will probably be 60mm I.D. but may be 70mm and the length will probably be 160 to 200mm. I don't have pss9's but my memory is they have a rear tender spring which isn't needed if you get a spring 180mm or longer. My KW's came with 200mm rears, I then switched to 170mm and now I'm at 140mm plus a tender spring, which reall only acts as a spacer in the rear. H&R is a good source for relatively cheap metric springs.

 

Those are progressive rate springs I beleive. The PSS9 dampers are more than likely really well tuned to those springs.

 

Call Turner Motorsports and talk with them about this. They have re-sprung quite a few PSS9s and tell me that raising the rate a good amount without revalving works out OK.

 

Thanks for all the feedback. I'll be contacting Turner to see what happens.

 

Just found this thread... If you did indeed contact Will, or someone at TMS, kindly share what you found-out.

I have PSS9's, and while satisfied, I'm just wanting to try a linear spring in the front. Part me feels that a more constant, predictable rate will be beneficial in keep the car the stable.

Thanks.

 

Edit: oops, posted in the wrong thread

 

Hey Tony, are you sure you want linear in the front and progressive in the rear? I'm not saying it's a horrible idea...Acura's Type R came factory equiped this way and its still a really good handling car today. Just checking.

 

Hi Michael. Ideally, I'd want linear all the way around, and that was the original plan when I went with Ledas initially. Arn't the PSS9's linear in the rear? I sort of thought they are only progressive in the front, but maybe I mis-read that somewhere...

 

I ***-ume the rates are progressive front and rear. I think - if matched well - a linear front spring and a progressive rear spring is about the best compromise one can hope for with a nose heavy, mostly street driven car. The Type R I had did not posses bouncy rear end.

 

Michael, one would tend to think so... I know I've seen it mentioned several places here on NAM. Somewhat busy now at work, but here's the most recent one that alludes to it:

https://www.northamericanmotoring.co...83&postcount=6

 

Front progressive, rear linear.

Scott
90SM

 

Thanks Scott for the confirmation. The progressive rate in the front was the only reason that was initially holding me back. If there is a linear replacement that has shown to be a nice match, I'm all for a try...