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OEM Spring Rates for Sc400

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Old 11-19-05, 08:59 PM
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fnutz
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Default OEM Spring Rates for Sc400

Does anybody know what the actual OEM spring rates are for a SC400?...Thanks
Old 11-20-05, 08:42 PM
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JKAG
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Not sure about the 400 but I have down 368 front and 154 rear for the SC300
Old 11-21-05, 09:11 AM
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fnutz
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So...that would be ~10.5kg front and only ~4.4kg rear...correct...wow that seems low...
Old 11-21-05, 09:15 AM
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Lvangundy
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How are they calculated?

Edit, I suppose this works..

http://www.engineersedge.com/spring_comp_calc.htm
Old 11-21-05, 10:02 AM
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JKAG
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FYI, other spring rates

Supra TT.............430 front 219 rear

SC300 Eibachs.................514 front 230 rear
Supra TT Eibachs .............514 front 263 rear
...........Eibachs are progressive, the above numbers are the maximum rates
Old 11-22-05, 07:09 AM
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fnutz
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I just used my engineering conversion program and converted Ounce Force to Kilogram Force...

So the Supra TT would be 12kg front and 6kg rear..

SC300 Eibachs 14.5kg F and 6.5kg R

Supra TT Eibachs 14.5kg F and 7.5kg R
Old 11-22-05, 07:50 AM
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JKAG
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I don't think your conversion is correct.

I have 56 lbf/in to 1.0 kgf/mm

514 =9.2

In your post you said ounce force. It is pound force
Old 11-22-05, 08:51 AM
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VJ RC51
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I used intrax springs. Progressive springs like eibach make your car feel like a boat
Old 11-22-05, 08:54 AM
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fnutz
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I'm sorry ...JKAG you are correct my numbers are off...it is ~56 lbf/in to 1.0 kgf/mm...
Old 11-22-05, 08:58 AM
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JKAG
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VJ

I disagree. My car with Eibach, Tokico and Supra sway bars handles great. On the road and on the track (road course).

As was explained to me by an engineer at Eibach ... our car is so heavy that the springs are almost always at the stiffer rates.

BTW, I am going to Tien Flex coilovers to get higher spring rates for the track
Old 11-22-05, 09:22 AM
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VJ RC51
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i had a 95 firebird with eibach, god it drove so horrible. I had so much more confidance with it on OEM springs. I swore to myself to never go eibach again.

The intrax are linear, and they are stiff as heck. Sometimes on the highway it can be annoying, but i love how the car handles and now solid it feels.
Old 11-23-05, 08:28 PM
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SCV8
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Problem with the Eibachs is that the heavy car is always very near the bumpstops.
Old 05-02-06, 09:21 AM
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scsrock
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Do stock springs interchangeable for SC300 and SC400? How about Eibach springs? I have a 94 SC300, but mistakenly ordered Eibach springs for SC400. Should I send them back to exchange for SC300 springs? I notice the total weight for Eibach SC400 springs is 10lb heavier than that for Eibach SC300 springs. Anyone can guess how the SC300 would feel like if I just go ahead an install the SC400 springs on my SC300?

I would greatly appreciate your help.
Kevin,
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