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Spring rates

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Old Mar 6, 2005 | 08:18 PM
  #41  
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Originally Posted by Thnks2u,Mar 7 2005, 02:22 AM
A few months back I took a set of MY 04 OEM springs to Turner Motorsports in MA and had them measure the spring rates with their equipment. Two days and $85 later gave me a printout 5 measurements made on each spring.

Fr(Ave) = 250lbs/in +/-5%

Re(Ave) = 255lbs/in +/-5%

These numbers pretty much agree with the known values for the 00-01MY and the "percent changes" that can be found in the literature.

Cal
I would have done it for free on a better rating device

Also, if they rated them, they should have the exact rate, not "+/-5%".

Ryan
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Old Mar 7, 2005 | 12:29 AM
  #42  
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So, assuming the 250front/255rear is correct, that would mean we have the following versions of S2000 springs?

'00-'01 (Based on info from King's website, no longer available.)
218 / 291

'02-'03 (Calculated from '04 numbers.)
233 / 283

'04-'05 (Based on Turner Motorsports measurements.)
250 / 255

vtecvoodoo, sound like Thnks2u does have the exact measurements - he stated he has a printout of five readings from each spring. I suspect he just summed it all up for us, perhaps.

Anyway, given my experiences of driving each of the three different configurations, that tends to agree with my impressions - although the different sway bar rates would have to be taken into account as well.
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Old Mar 7, 2005 | 02:28 AM
  #43  
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Originally Posted by hondamanwill,Mar 6 2005, 06:22 PM
I understand what your saying but in order to stay in my stock class I have to use factory springs.
If you're referring to SCCA Solo 2 stock class, there's no swapping of springs allowed...
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Old Jun 14, 2006 | 10:42 PM
  #44  
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The springs rates for '02-03 on the original post were wrong. '03 rear springs are DEFINITELY stiffer than '00 rear springs.

'02-03 spring rates should be

230F/300R

Check out my post here for details.
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Old Jun 15, 2006 | 02:38 PM
  #45  
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so wheres the best place to buy KG/mm sport's???
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Old Jun 15, 2006 | 04:01 PM
  #46  
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From: veritas caput
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Originally Posted by rlaifatt,Feb 21 2005, 02:47 PM
I've tried these different springs on my JRZ's:

Front/Rear:
425/550
500/550
500/650
550/650
550/750
650/750 and probably a few other permutations

You can definitely feel the difference in ride and handling, but this probably varies (greater?) depending on the shocks too.
Any of those springs happen to be for sale? I'm assuming they're 8" high and 2.5" i.d. Let me know - thanks
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Old Jun 19, 2006 | 09:54 AM
  #47  
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psst, I'm thinking the kg/mm sports will work for me, but when I google them, I can't find a shop that sells them...
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Old Jun 24, 2006 | 02:36 PM
  #48  
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Originally Posted by stocky,Feb 21 2005, 12:30 PM
Strang etaht Mugen has such a difference between front and rear rates.

Also the go the inverse way than SPOON ?!

Could it be that the spring rates don't affect the ride THAT much than we think?!
Not to go off topic, keep in mind shock design makes a difference. The Showa's made for Spoon Sports (which look like tokico shafts inserted in OEM honda showa bodies) retain the stock concept of monotube design. The piston area is the same as stock. The Mugen shocks (and I don't know why) reverted to good ol fashioned twin tube design. Typically twin tube is not what's recommended for racing applications and often (not always) is cheaper to make. Mugen found a way to make them expensively...as always. I believe the Mugen is aluminum construction, while the showa's are steel. The oil in twin tube design (it is argued) can't cool as quickly as monotube designs because it's sleeved. The "twin" part of the tube, ie. the exterior jacket, hold the nitrogen. This has the effect inconsistant response as the oil's temp increases in heavy use applications, which in turn, affect the rebound rate.

Also keep in mind that Spoon designed their system to work with smaller diameter (and wall thickness) sway bars. The front is much smaller (as a percentage) than the rear sawybar change (in reference to 00-01, when they were designed), while the Mugen uses larger diameter swaybars on the front, and I believe the rear is unchanged, but I am not a Mugen expert, so don't quote me.

This is my theory anyway. But what do I know?

Again, sorry for going off topic.

cheers

W.

PS. Richard...how about a few springs for your old pal?
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Old Jun 24, 2006 | 02:55 PM
  #49  
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From: veritas caput
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Originally Posted by Wael El-Dasher,Jun 24 2006, 06:36 PM
PS. Richard...how about a few springs for your old pal?
Wael, what rates are you looking for?

I have the 2 pairs of 400# from the JRZ's I bought from you. I also have a pair of 450's and a pair of 800's.

If I can get a pair of 550'ish and a pair of 650'ish, I won't need a pair of the 400's.

<edited>
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