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Old 03-27-2011, 07:47 PM   #1
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Default Coilover spring length

How long of springs do i need when putting together a set of coilovers? 7" front and 7" inch rear? I want to be able to go low enough.
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Old 03-27-2011, 08:29 PM   #2
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Please, be more vague.
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Old 03-27-2011, 08:35 PM   #3
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lmao. What wheels do I need for a car guyths?
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Old 03-27-2011, 09:23 PM   #4
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I dont know how thats vague? Whats the typical length used when people are putting coilovers together.
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Old 03-27-2011, 09:27 PM   #5
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100 units
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Old 03-27-2011, 09:42 PM   #6
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Quote:
Originally Posted by 89325iturbo View Post
I dont know how thats vague? Whats the typical length used when people are putting coilovers together.
Profess your undying admiration for the forum and proclaim immortality for Miata Turbo ad the glory of knowledge will be bestowed upon you.
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Old 03-27-2011, 09:42 PM   #7
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Quote:
Originally Posted by 89325iturbo View Post
I dont know how thats vague? Whats the typical length used when people are putting coilovers together.
12 Parsecs
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Old 03-27-2011, 09:47 PM   #8
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Recite this prayer and I will help you:
Before the almighty and ineffable God Satan/Lucifer and in the presence of all Demons of Hell, who are the True and the Original gods, I, (state your full name) renounce any and all past allegiances. I renounce the false Judeo/Christian god Jehova, I renounce his vile and worthless son Jesus Christ, I renounce his foul, odious, and rotten holy spirit.

I proclaim Satan Lucifer as my one and only God. I promise to recognize and honor him in all things, without reservation, desiring in return, his manifold assistance in the successful completion of my endeavors.
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Old 03-27-2011, 11:36 PM   #9
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a 50 lb/inch spring will compress 15 inches for a spring load of 750 lbs (about normal for a rear miata spring). So you need at least 15 inches plus some more travel plus the coil bind height of the spring. I'd suggest a 36 inch long spring in this case.
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Old 03-27-2011, 11:37 PM   #10
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ok
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Old 03-27-2011, 11:46 PM   #11
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I just thought, i would get help with a question. Im not new to coilovers or putting together set-ups. Im sure some of you wouldnt know the ideal lengths and rates for bmw's which is were im coming from.
Im new to miatas and wasnt completely sure what was proper. So sorry about the noob question if it is one.
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Old 03-28-2011, 12:32 AM   #12
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the number is 23
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Old 03-28-2011, 12:43 AM   #13
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No its 3
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Old 03-28-2011, 01:41 AM   #14
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The answer is:

It depends on your desired spring rates and ride height.
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Old 03-28-2011, 02:05 AM   #15
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Quote:
Originally Posted by 89325iturbo View Post
I just thought, i would get help with a question. Im not new to coilovers or putting together set-ups. Im sure some of you wouldnt know the ideal lengths and rates for bmw's which is were im coming from.
Im new to miatas and wasnt completely sure what was proper. So sorry about the noob question if it is one.
Tell us which which perch, which shock, which upper mount, which generation car, and a ballpark spring rate range. I could tell you 5" which works on my shock but won't work on yours.
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Old 03-28-2011, 09:21 AM   #16
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I was thinking koni race in the front with stock NA top hats 6" spring 650-700 spring rate. The rear koni sport, with nb top hats 7" spring 400lb rate. With some oval track or whatever coilover sleeves Q1A springs. This is for a 91.
Is the koni shock body 2"? Would it be better to keep the shocks the same? To put races in the back as well because of the different dampening chracteristics?
The races are pricy so saving $250 on the rears would be nice.
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Old 03-28-2011, 09:34 AM   #17
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There you go. finally non-vaguness.

With those rates, you could probably get away with 5"/6"

When I had Koni Sports w/NB hats, 7" 550lb springs were just a little too long if you wanted to get low enough. The 7" 300lb spring I had in the rear was perfect.
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Old 03-28-2011, 11:28 AM   #18
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Depending how low you go, 6" will work in the rear too. I have 6" front and rear w/ NB fronts, FM rears, and 36mm bumps and have no coil bind issues at 12.5" in the rear.
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Old 03-28-2011, 11:41 AM   #19
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Quote:
Originally Posted by Adam777 View Post
Depending how low you go, 6" will work in the rear too. I have 6" front and rear w/ NB fronts, FM rears, and 36mm bumps and have no coil bind issues at 12.5" in the rear.

Please make sure to leave out what spring rates you use.

I currently have 6" springs in the rear and they bind. I wont tell you more because its not important, so therefore 6" springs cannot be used in the rear.
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Old 03-28-2011, 11:51 AM   #20
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Sorry, just trying to keep in the spirit of the OP

I have 450 lbs in front and 300 lbs rear. I thought I had the rates in my sig, but that was on a different forum.
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