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Originally Posted by angryfist,Mar 3 2010, 07:01 PM
im curious how the 8" springs fit. i have everything semi assembled but dont think i can use 8" springs. I think i have to goto at least 6". with the 8 assembled the spring perch is all the way down and the tender springs are all the way compressed.
It really depends on the spring rate but if you went with anything over 4-500lbs then I'd say an 8" spring will be too long. If you're 800 and up than I'd say a 6" spring would probably be needed but I'm just guessing at this point.
Each corner is 750lbs if your car is a pig like mine so a 750lb spring will compress an 1 1/4" roughly, very roughly
i dont know what the stock PSS rates are (i know they arent that high) but it seems that even that wouldnt give much room to spare in lowering. the spring perches just dont go that low. i think i'm going to be cutting it close with even a 6" spring. i'll just have to try and see what happens...
Stock rates are 340 and 285.
The only reason they give you helper springs is if you end up going super low, I'm actually a little lower than I'd like to be and the helper spring is completely compressed.
I'll post up a couple of pics that may help your decission on spring length.
Hang on a few minutes
The KW is a 5.5" spring 571lbs and the SRC is a 5" spring 896lbs
Hope this info helps.
The helper or tender spring on the Bilsteins is not fully compressed in the pic but when I put them in, the car was like 3/4's to an inch too low.
I'm gettin my PSS's revalved with linear pistons per the builder.
Going with the linear pistons makes sense and hopefully it works.
Getting parts was a bit more of pita than I thought but was able to get them through a circle track guy. Bilstein in Poway CA was no help but Bilstein in Mooresville NC was really helpfull.
I drove on the PSS's for a bit but not quite as long as I wanted and to me they had a bit to much rebound and not enough compression but they didn't release or blow through like some other dampers. I was getting an odd vibration over some bumps and that was due to the built in bleed.
I can't wait to try the revalced PSS's once the parts come in.
I'm gettin my PSS's revalved with linear pistons per the builder.
Going with the linear pistons makes sense and hopefully it works.
Getting parts was a bit more of pita than I thought but was able to get them through a circle track guy. Bilstein in Poway CA was no help but Bilstein in Mooresville NC was really helpfull.
I drove on the PSS's for a bit but not quite as long as I wanted and to me they had a bit to much rebound and not enough compression but they didn't release like some other dampers. I was getting an odd vibration
will have to continue later
I drove on some PSS9's for 10-20 miles before switching them out for my Penske's on the new car - I have no idea what setting they were on but they felt like butter. Incredibly smooth. The way the stock ones should have been from the factory.
That being said - I never pushed the car so I don't what they are like at the limit of tire adhesion.
The smooth feel is from the bleed which is not good for adhesion. They are definitely a good street damper though. The valving starts at 2" on rebound and like 3" on compression and the compression curve is very smooth or at least smoother than rebound. It would be interesting to just flip the piston, valving and remove the bleed and see how they are but it's probably more work than it's worth.
