Spring rates
Where you find this data?
I posted this question way back... the answer I got was
180 front &
225 rear.... I believe.
I posted this question way back... the answer I got was
180 front &
225 rear.... I believe.
Originally posted by wtz
Stock Evo spring rates are 225 lbs. front and 260 lbs. rear. This is US spec.
Cheers,
Stock Evo spring rates are 225 lbs. front and 260 lbs. rear. This is US spec.
Cheers,
I had the stock springs tested by ProParts and the rates were 180 lb/in on the front and 225 lb/in rear. The choppy ride is due to the stock shock valving which appears to be set for much stiffer springs.
Exactly what my friend is telling me... he said that my EVO's ride
is really poor over small bumps... however, seems to be much
less punishing at highway speeds...
is really poor over small bumps... however, seems to be much
less punishing at highway speeds...
Originally posted by 93esp
I had the stock springs tested by ProParts and the rates were 180 lb/in on the front and 225 lb/in rear. The choppy ride is due to the stock shock valving which appears to be set for much stiffer springs.
I had the stock springs tested by ProParts and the rates were 180 lb/in on the front and 225 lb/in rear. The choppy ride is due to the stock shock valving which appears to be set for much stiffer springs.
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Evolving Member
Joined: Dec 2002
Posts: 447
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I don't have quite the faith in Pro Parts as I do in Joe Stimola from SRP Engineering. He has been doing spring and shock work with both the SCCA and various pro-series teams forever. I stand by my numbers.
Cheers,
Cheers,
Originally posted by 4ringturncoat
That is interesting on the stock numbers! Tien S's are only 212 front and 291 rear.
That is interesting on the stock numbers! Tien S's are only 212 front and 291 rear.
Anyone know the rates on the Eibach Pro kit?
Evolving Member
Joined: Oct 2002
Posts: 362
Likes: 0
From: Northern Michigan
Gruppe-S has a number of spring rates listed on their website:
Tien STech, Front: 196 lb/in, Rear: 268 in/in
RSR, Front: 216, Rear: 177
Eibach Pro-Kit, Front: 165, Rear: 140
Japanparts has some numbers for some Ralliart springs:
Front: 280 lb/in, Rear: 307 lb/in
The problem is that the websites don't describe whether the springs have linear or progressive spring rate. You can tell by looking at the springs, but the pictures shown are often kinda small and not at a good angle.
With a progressive spring, the rate increases with more compression, so the spring rate number will depend on how much the spring is compressed.
Generally, linear rate springs are better for performance because they are more predictable.
Tien STech, Front: 196 lb/in, Rear: 268 in/in
RSR, Front: 216, Rear: 177
Eibach Pro-Kit, Front: 165, Rear: 140
Japanparts has some numbers for some Ralliart springs:
Front: 280 lb/in, Rear: 307 lb/in
The problem is that the websites don't describe whether the springs have linear or progressive spring rate. You can tell by looking at the springs, but the pictures shown are often kinda small and not at a good angle.
With a progressive spring, the rate increases with more compression, so the spring rate number will depend on how much the spring is compressed.
Generally, linear rate springs are better for performance because they are more predictable.
Evolving Member
Joined: Oct 2002
Posts: 362
Likes: 0
From: Northern Michigan
That site doesn't give any drop information on these springs. I'd like to know that myself. It does show a diagram with Ralliart coilovers that shows a recommended ride height.
http://www.japanparts.com/Pic/pic093/01-01.jpeg
http://www.japanparts.com/Pic/pic093/01-01.jpeg
Evolving Member
Joined: Jul 2003
Posts: 343
Likes: 0
From: San Diego
Is it better to maintain the stock ratio of fore and aft rates? The Tein's seem to pretty "different" than the rest, I think they also lower the front more than others to give a visual evenness. I ask because I'm looking for the best compromise for pure street driving in all conditions and using the stock struts.