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Old Jun 11, 2010 | 07:25 AM
  #111  
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From: Emmett
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Originally Posted by AyJay,Jun 11 2010, 07:45 AM
I've got a set of PSS now but I think I'm going to deviate from my original plan of turning them around to Bilstein for a revalve right away.

Now that I've pretty much been eliminated from taking 1st in my AutoX class I'm just going to put the PSS on and run them for the rest of the season. They'll come off again for revalve after the season ends. No rush now. I wanna be able to get some more track days in soon and other activites w/o funneling most of my play funds to coilover hardware.

Speaking of being eliminated, I met a guy named Guy (LoL) at the last autoX event that can pretty much take the Sac STR cup if he wants it enough to keep showing up. He's running custom valved Bilstein PSS and he valves them himself. He also makes his own tophats, sway bars, camber kits, etc. He's willing to make and sell all that stuff to S2k'ers that want it.

He seemed to make a pretty compelling arguement as to why I shouldn't run the OEM tophats because the the spring and shock will not be loaded evenly w/o a bearing at the top. It'll just be crashing into the tophat (paraphrasing). Basically, he said you can run the OEM tophats but it's far from optimal.
Guy is a very nice guy. I think he has some double adjustable bilsteins or maybe I heard wrong. He makes a top hat the way it should be made but he wants to make a few sets and I just want one set. I'm going to try and get a friends friend to machine some for me, they're easy for someone to make.
It's true about keeping the spring square but for it to be a problem you have to be anal like me to not see that they are pretty damn square in our car. It's so close that the spring rates would have to be much higher than what I'm running to cause any issues. What happens is that you could loose useable stroke in the spring as well as putting a side load on the shock but at 2.5 inches I'm not sure how much that would be. I'll still eventually have some top hats made but I'm not worried running the stock top hats.

You should at least try springs at somepoint with your bilsteins.
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Old Jun 11, 2010 | 07:31 AM
  #112  
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From: Emmett
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Originally Posted by AyJay,Jun 11 2010, 07:50 AM
@Mac: You may have seen this already, but here is an example of a member on this forum using the GC tophats w/ a non GC coilover (KW in this example). I believe KW uses the same 2.5" ID springs that you are using.
It's just a stock replacement top hat. You're better off using a spring perch with the stock top hat if you're worried about the spring being square with the shock.
Good luck finding a 10mm id spring perch, if you find one let me know
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Old Jun 11, 2010 | 07:32 AM
  #113  
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From: Emmett
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Originally Posted by AyJay,Jun 11 2010, 08:21 AM
We're on the same page w/ that... I was all ears... especially after the kinda times he was running.

My job there was to try to ask semi-intellegent questions .

My good friend and I (VROD04 on this forum) have been battling for top spot in STR this year. Guy whupped his co-driver and both of them whupped us leavin us to fight amongst ourselves for 3rd .

Guy mentioned that he was also interested in valving a set of Penskes for himself. And he might have even talked VROD into leaving his HKS Hipermax setup for Bilstein ... but that remains to be seen.
What was the difference time wise between you and guy?
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Old Jun 11, 2010 | 08:08 AM
  #114  
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It was a lil over 2 secs IIRC... I feel i coulda cut it down a little more on my last run but I was goofing around a lil bit after seeing I had no chance. LoL

I wanna say VROD closed the gap to around 1 second on his last run. Still a signifcant margin.

It was pretty clear that Guy is a better driver and me in my stock S2k had no chance.
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Old Jun 11, 2010 | 08:22 AM
  #115  
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Originally Posted by macr88,Jun 11 2010, 07:31 AM
It's just a stock replacement top hat. You're better off using a spring perch with the stock top hat if you're worried about the spring being square with the shock.
Good luck finding a 10mm id spring perch, if you find one let me know
To hear GC tell it, it's differs from a OEM mount:

Ground Control S2000 upper mounts - These mounts use a custom-made urethane bushing system, preloaded to avoid deflection without making noise after a few weeks. Our exclusiveS2000 mounts have all the advantages of a "Pillowball" without any of the disadvantages.
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Old Jun 11, 2010 | 08:27 AM
  #116  
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Thats BS - they do nothing like a spherical bearing does. The GC ones still do not allow for articulation of the spring, only the shock shaft.


edit: and thats the absolute last place you want to put urethane - in the upper shock mount. You want to allow the shock to articulate with no resistance - otherwise all you are doing is increasing the bending load on the shaft and wearing out seals.
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Old Jun 11, 2010 | 08:56 AM
  #117  
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^ That is as good an explanation as any regarding why a person would choose not to use these.
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Old Jun 11, 2010 | 01:48 PM
  #118  
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KW's are 2.25 or 60mm inside diameter springs. 2.5 would work as long as you had the right perches though.
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Old Jun 11, 2010 | 03:01 PM
  #119  
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Originally Posted by macr88,Jun 11 2010, 07:25 AM
You should at least try springs at somepoint with your bilsteins.
I've heard other people say that these were "overdamped" when I had them on my previous car... and I know you've even suggested swapping springs to me before. What kind of increase are you talking? 50 lb/in? 100 lb/in? What would you consider the best increase to match OTS valving?

I've thought about moving my front springs to the rear and buying another set of 392 lb/in springs for the front but I just thought I wouldn't be gaining much for the extra $100+ for new springs. I don't see alot of used 70mm ID springs floating around.
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Old Jun 11, 2010 | 04:17 PM
  #120  
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From: Emmett
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I ran 650 in the front before they were revalved, not really sure what springs you were thinking of running but it's not going to hurt anything and you can only gain knowledge. By running the springs you want you be able to better explaing to the person revalving them.
If you just want to run the same rate bilstein spring you can PM me.
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