S13 Spring rate/Ride Height guide

[sushiplugger]

I have compiled a list of information on as many spring sets as I could find for the s13 240sx. I put it together initially so I could figure out what springs I wanted to get, as there seemed to be no comprehensive listing of spring specs for our cars. I figured that it might be useful to other people as well.

This information in not necessarily complete and/or accurate, however, so I would appreciate any comments on information that I have wrong, so I can update this post. Hopefully I can end up compiling a complete and accurate list for people to use when purchasing springs.

I have listed where the numbers came from manufacturers as well as expected ranges of drop from people who have these springs on their cars. Any input on real-life ride height will be helpful as I will incorporate that in addition to the mfg's spec numbers.


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LINEAR SPRINGS FOR 1990 S13 240sx
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Stock S13 (1990 FSM #'s)
Spring Rate - F : 2.0 kg/mm | 112 lbs/in (w/ sports pkg. 2.2kg/mm | 123 lbs/in)
Spring Rate - R : 2.0 kg/mm | 112 lbs/in (w/ sports pkg. 2.2kg/mm | 123 lbs/in)
Ride Height - F : 0"
Ride Height - R : 0"

Trust/GReddy Sport
Spring Rate - F : 2.6 kg/mm | 146 lbs/in
Spring Rate - R : 2.6 kg/mm | 146 lbs/in
Ride Height - F : -1.0"
Ride Height - R : -1.0"

Whiteline
Spring Rate - F : 2.8 kg/mm | 155 lbs/in (MFG #'s)
Spring Rate - R : 3.0 kg/mm | 165 lbs/in (MFG #'s)
Ride Height - F : -1.8" (MFG #'s)
Ride Height - R : -1.6" (MFG #'s)

Tokico
Spring Rate - F : 3.0 kg/mm | 169 lbs/in
Spring Rate - R : 2.7 kg/mm | 150 lbs/in
Ride Height - F : -1.0 (expect -1 ~ 2 inch range)
Ride Height - R : -1.0 (expect -1 ~ 2 inch range)

RS-R Down
Spring Rate - F : 3.0 kg/mm | 167 lbs/in
Spring Rate - R : 3.0 kg/mm | 167 lbs/in
Ride Height - F : -1.5 est. (95-98 240sx drop)
Ride Height - R : -1.2 est. (95-98 240sx drop)

Suspension Techniques
Spring Rate - F : 3.7 kg/mm | 206 lbs/in
Spring Rate - R : 2.8 kg/mm | 155 lbs/in
Ride Height - F : -1.3" (MFG #'s)
Ride Height - R : -1.3" (MFG #'s)

Tein S-tech
Spring Rate - F : 3.7 kg/mm | 207 lbs/in (MFG #'s)
Spring Rate - R : 3.2 kg/mm | 179 lbs/in (MFG #'s)
Ride Height - F : -1.5" (MFG #'s)
Ride Height - R : -1.2" (MFG #'s)

HKS Super Sports
Spring Rate - F : 4.1 kg/mm | 232 lbs/in
Spring Rate - R : 3.5 kg/mm | 194 lbs/in
Ride Height - F : ????
Ride Height - R : ????

RS-R Sport
Spring Rate - F : 5.0 kg/mm | 279 lbs/in
Spring Rate - R : 4.2 kg/mm | 235 lbs/in
Ride Height - F : ????
Ride Height - R : ????

KG/MM S21
Spring Rate - F : 6.6 kg/mm | 369 lbs/in
Spring Rate - R : 5.2 kg/mm | 291 lbs/in
Ride Height - F : -1.3"
Ride Height - R : -1.2"



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PROGRESSIVE SPRINGS FOR 1990 S13 240sx
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H & R Sport
Spring Rate - F : 2.0~2.08kg/mm | 112~116 lbs/in
Spring Rate - R : 2.5~2.6kg/mm | 140~145 lbs/in
Ride Height - F : -1.3" (MFG #'s)
Ride Height - R : -1.3" (MFG #'s)

Eibach Pro-Kit
Spring Rate - F : 2.0~3.6 kg/mm | 114~200 lbs/in
Spring Rate - R : 2.0~2.6 kg/mm | 114~148 lbs/in
Ride Height - F : -1.8" (MFG #'s)
Ride Height - R : -1.6" (MFG #'s)

Eibach Sportline
Spring Rate - F : 2.5~4.1 kg/mm | 137~230 lbs/in
Spring Rate - R : 2.3~3.6 kg/mm | 128~200 lbs/in
Ride Height - F : -2.2" (MFG #'s)
Ride Height - R : -2.1" (MFG #'s)

KG/MM DR21
Spring Rate - F : 3.0~4.8 kg/mm | 167~268 lbs/in
Spring Rate - R : 2.8~4.0 kg/mm | 156~223 lbs/in
Ride Height - F : ????
Ride Height - R : ????

5Zigen R-Rate (Discontinued?)
Spring Rate - F : 2.4~5.2 kg/mm | 134~291 lbs/in
Spring Rate - R : 1.9~5.0 kg/mm | 106~280 lbs/in
Ride Height - F : -1.3"
Ride Height - R : -1.1"

KG/MM DR Racing
Spring Rate - F : 3.2~6.6 kg/mm | 179~369 lbs/in
Spring Rate - R : 2.4~5.2 kg/mm | 134~291 lbs/in
Ride Height - F : ????
Ride Height - R : ????

Intrax Sport
Spring Rate - F : ????
Spring Rate - R : ????
Ride Height - F : -2.2" (MFG #'s)
Ride Height - R : -2.0" (MFG #'s)

Sprint
Spring Rate - F : ????
Spring Rate - R : ????
Ride Height - F: -1.8 (MFG #'s)
Ride Height - R: -1.8 (MFG #'s)

Hope this is helpful!

|>@T

[Dousan_PG]

um..you know we got that in the FAQ section, why dont you add it to that please!
great work though! :)


http://www.zilvia.net/f/showthread.php?s=&threadid=7590

[sushiplugger]

Don't I feel stupid! Wonder how I missed that FAQ? Thanks for letting me know......

[AKADriver]

Hmmm... aren't whiteline's rear springs progressive? or is that just the S14 application?

Nice job though! Many of these springs aren't listed in the current archive and some of this information's tough to get (like the rates of the H&R's... WOW rear-stiff!!!! but soft...)

[sykikchimp]

if you haven't already, figure out which ones are already listed, and add the ones that aren't.

Thanks! Extra FAQ info is ALWAYS a big plus!

[sushiplugger]

I added about 4 of those springs to the FAQ page. There seems to be some contention about the Tein S-tech rates. I found the info I listed on their website, but I keep seeing the 3.2 kg/mm front spring rates listed by people. Are we talking about the same spring set, or does Tein have a slightly softer set than the S-Techs listed on their website?

|>@T

[sushiplugger]

Oh yeah,

I will try to continue to keep an updated list of the spring specs on this link, as I can edit the posts indefinitely on the fresh alloy forum.

http://forums.freshalloy.com/ubbthreads/showflat.php?Cat=&Board=UBB27&Number=67360215&fpart=&PHPSESSID=

If I could edit my posts after 180 minutes, I would continue to update this site as well. But as it stands right now, I don't think a thread with pages full of "NO DONT LISTEN TO THE LAST POST THIS IS THE LATEST UPDATE OF THE LIST...NO REALLY!" would be very fun to read.

|>@T