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SWB rear spring question???

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Offline nevadasmith

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SWB rear spring question???
« on: July 26, 2007, 11:13:18 AM »
I searched in the forum and found several poast that list 2dr tack/kick rear spring as 156 lb/in
but when i use the calculaters on line I come up with 101 lbs/in, by the dimmentions, and as i was getting quotes from the 2 seperate spring makers they had different sping rates on file for the rear spring 165 lbs/in and 107 lbs/in? what gives???? I'm going to oder custom springs but what rate???
92 hardtop removable + swampers + 2.5" lift+ locker+ onboard air

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Offline crikeymike

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Re: SWB rear spring question???
« Reply #1 on: July 26, 2007, 11:58:49 AM »
A good spring maker would be able to measure what your springs are at now, and adjust accordingly.

I highly doubt it's only 107lbs/in.  My 4-door has 200lbs/in springs in the back of it, and they're still very comfortable (not hard at all).

What specs are you wanting them to make them to?  Massive lift, progressive rate, ???
1993 4-door Sidekick
3" hybrid Calmini/OME lift, 2" B/L, Rear air locker
Shrockworks bar & sliders, Full skid plates
4.24:1 t-case
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Offline Rhinoman

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Re: SWB rear spring question???
« Reply #2 on: July 26, 2007, 12:57:38 PM »
157lbs is the value declared by Suzuki. I did have a copy of the document at one time. I'm not sure if I've still got it. 165lbs is pretty close its only 5% out so it could be within Suzukis tolerances or a simple measurement error.
You can measure the rate by placing a known weight on the spring and measuring the compression. Just remember that whatever you measured the weight with will have a measurement tolerance itself.
« Last Edit: July 26, 2007, 01:00:01 PM by Rhinoman »
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Offline nevadasmith

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Re: SWB rear spring question???
« Reply #3 on: July 26, 2007, 03:18:18 PM »
I want em soft mabey to soft but i just ordered them 20" free lenght 95lb/in straight rate, If I'm making a huge mistake let me know!!!!
92 hardtop removable + swampers + 2.5" lift+ locker+ onboard air

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Offline crikeymike

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Re: SWB rear spring question???
« Reply #4 on: July 26, 2007, 03:33:30 PM »
I don't have anything to back this up, but if they are too soft, the coils will hit themselves (become coil bound) on compression, and they'll wear out very quickly.
1993 4-door Sidekick
3" hybrid Calmini/OME lift, 2" B/L, Rear air locker
Shrockworks bar & sliders, Full skid plates
4.24:1 t-case
 WAZUKS member - visit http://www.wazuks.com

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Offline nevadasmith

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Re: SWB rear spring question???
« Reply #5 on: July 26, 2007, 03:55:29 PM »
I borrowed a digital scale from work and checked the ome springs in a hydrolic press 125 lbs |removethispart|@ 1" , and 274lbs |removethispart|@ 2" and they are to stiff for my tastes so.....  thats like 133 lbs/in average  

I have 1064 lbs on the back axel  thats 532 per spring 20" free length and I want a 14.5-15" spring ride hight so 532lbs/5.5inches= 96 lbs/in I orded 95  they have a collapsed hight of 6" and my tire should hit the fender before I get to 6" so I don't think coil bind will  a problem 
92 hardtop removable + swampers + 2.5" lift+ locker+ onboard air

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Offline crikeymike

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Re: SWB rear spring question???
« Reply #6 on: July 27, 2007, 07:55:30 AM »
The standard 2-door rear OME coils are OME952 and they're 345mm (13.5") free height with 140lbf/in.

Considering you're asking for a coil 6" taller than that, the spring rate will be a lot less like you've stated.

I'll be interested to see what you're doing with this, since that'll be about 7" more height over stock.  What's going on up front?
1993 4-door Sidekick
3" hybrid Calmini/OME lift, 2" B/L, Rear air locker
Shrockworks bar & sliders, Full skid plates
4.24:1 t-case
 WAZUKS member - visit http://www.wazuks.com

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Offline nevadasmith

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Re: SWB rear spring question???
« Reply #7 on: July 27, 2007, 07:45:32 PM »
 ;D toyota IFS full front clip modified to for flex, and after i poasted last night i did some more math pannicked and called to change spring rate you'll all be happy to know you were right and 95 lb/in was to soft, new rate 106lbs/in!!! ;D

thanks for the help! zuki are the best toy ever, and this is the web site for them!

as a side note if any one is intresed in doing a low buck 6" lift with swap to yota axels I Have been thinking about doing sortof a how I dunnit poast with picks and autocad drawings I made. if not I won't waste the space
92 hardtop removable + swampers + 2.5" lift+ locker+ onboard air

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Offline crikeymike

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Re: SWB rear spring question???
« Reply #8 on: July 27, 2007, 09:43:28 PM »
As soon as you mention the words "low buck" someone will be interested.  Post if up if you've got the time.
1993 4-door Sidekick
3" hybrid Calmini/OME lift, 2" B/L, Rear air locker
Shrockworks bar & sliders, Full skid plates
4.24:1 t-case
 WAZUKS member - visit http://www.wazuks.com