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Stock spring rates question


turboman38

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3.7? that's pretty soft, especially for the rears. can that be right?

 

yea, I dont see why not, you can sit on the springs and be able to compress them some.

 

rally springs are even softer than that.. they rely on the shock to do a lot of the work.

Keefe
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yea, I dont see why not, you can sit on the springs and be able to compress them some.

 

rally springs are even softer than that.. they rely on the shock to do a lot of the work.

 

"Why not" is not very technical answer from resident suspension specialist.:confused:

We are talking about stock spring rates on our car.

It is 200 lbs or it's not. No if,but, maybe or "why not".

 

If numbers I posted are wrong - then I should be corrected.

Other members will read this post, and get confused even further.

 

Bob

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don't think anyone ever confirmed the stock rates for sure but tein H's are not progressive. the rate is 3.9/5.5 as listed on their own site.

 

SUBARU LEGACY

 

the H's are the second ones, the S-techs are listed first.

 

I believe the specs i posted were off of the Japanese website.

 

Check it.. http://www.tein.co.jp/ti/htech/gs52.pdf

 

However, I still believe the spring is progressive. I have the H-techs sitting in my garage and the coils get progressively tighter (wound).. While the stock springs have a uniform spacing between each coil.

 

Anyway, I am really not certain, but based on my observation and Tein's Japanese website I am deducing that they are progressive type springs and that the rate increases as the spring compresses.

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"Why not" is not very technical answer from resident suspension specialist.:confused:

We are talking about stock spring rates on our car.

It is 200 lbs or it's not. No if,but, maybe or "why not".

 

If numbers I posted are wrong - then I should be corrected.

Other members will read this post, and get confused even further.

 

Bob

 

 

i know they are soft, I dont recall the springs being EXACTLY 200 lbs/in but it's around that number (I remember seeing 197 lbs/in at one point for them)... hence my response to 'are you sure that they are that soft" and i said "i dont see why it wouldnt be"

Keefe
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The stock springs tested in a speedway coil spring rate tester.The spring set at stock spring height compressed 2 inch.So thats how I got the spring rates.

 

Both front and rear measured at 200 lbf/in?

Hmmm, then why every mfg. lists front around 200 lbf/in (pinks, swift, H-tecs)

and rear around 300 lbf/in?

It makes sense for rear to be 50% stiffer (because of mechanical advantage -

spring mounting point), so if rear springs were measured at 200 - actual rate at the wheel would be around 140/150 lbf/in.:confused:

 

Anybody else would like to chime in?

 

Bob

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i know they are soft, I dont recall the springs being EXACTLY 200 lbs/in but it's around that number (I remember seeing 197 lbs/in at one point for them)... hence my response to 'are you sure that they are that soft" and i said "i dont see why it wouldnt be"

 

I see what you're saying.

Only, "soft/hard" are personal views.

I still preffer to stick to numbers whenever possible, if such data

is available ,because we get posts like "measured stock spring rate 200 lbs"

and nobody in the world is selling rear springs even close to that number.

 

Just my 0.02

 

Bob

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The stock springs tested in a speedway coil spring rate tester.The spring set at stock spring height compressed 2 inch.So thats how I got the spring rates.

 

Is this the spring rate (spring taken off car) or the wheel rate (measured on car). If what you say is true then I have been tuning the car based on very flawed previous information.

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