coilovers worth the install - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-17-2008, 04:07 AM   #1
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Arrow coilovers worth the install

I got these coil overs from a friend for my miata. There not brand name.

They look like they would work but idk.

suggestions

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Old 04-17-2008, 05:10 AM   #2
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They are the ****! I mean the *****.. It really depends on the rates, but for what its worth ive herd both good and bad e-bay stories about similar "coilover selves." I would stay away from them if i were to do it all over again i would have gone straight to my flex or did a koni/GC set-up.
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Old 04-17-2008, 05:17 AM   #3
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yea i figured they were from ebay. O well ill just put them on anyway and see how they feel. I just want to drop the ride height of my car since its sits so high in the back
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Old 04-17-2008, 05:50 AM   #4
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spring rates?
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Old 04-17-2008, 07:30 AM   #5
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^ idk
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Old 04-17-2008, 08:39 AM   #6
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if you dont know any info on them no.

Sell them and get some fatcat bump stops, some flebay AGX, and have fun.
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Old 04-17-2008, 08:52 AM   #7
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From the accounts I've heard the thing to do with ebay coilovers is buy them for their sleeves and throw out the springs.

Do some research, figure out some good spring rates, and do it right.

Installing random springs on your car... Odds are against them being an improvement.
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Old 04-17-2008, 09:35 AM   #8
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I tried them a while back for grins. Part of your success (or failure) will be detrermined by what kind of shocks you have. With KYB AGX the sleeve sits in a really funky position. I ended up with loose springs at anything near full droop. This was on an NB so they might be better on an NA.
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Old 04-17-2008, 09:48 AM   #9
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go to the gym with a ruler and stack weights on them.
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Old 04-17-2008, 09:57 AM   #10
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or get a caliper and freaking do the math.
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Old 04-17-2008, 10:08 AM   #11
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Whats the equation on finding out the spring rates.
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Old 04-17-2008, 10:54 AM   #12
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F = K * X
solve for K
K = F/X
Where:
F = force (or the total weight you stack on the spring)
K = spring constant
X = spring deflection

So, for example, measure the free length of the spring. Say it is 10". Then you stand it on end and pile on 200 lbs. of weight on the top of the spring and measure its length again. Say the spring has compressed to 9". That means the spring has deflected 1". Therefore, using the equation above, your spring rate is K = 200 lb/in

You can also figure out K by measuring the spring, like the coil diameter, and counting the number of coils. But you need to know the springs material properties. Good luck finding that.
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Old 04-17-2008, 11:27 AM   #13
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F X k * 1 million
F= fucked
K= Krap

These ebay coil overs are fucked up crap x 1 million.
I wouldnt waste time with them.
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Old 04-17-2008, 11:46 AM   #14
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I know many locals that went/won in SCCA nationals with $40 ebay coilovers. Some are 500/350 lbs. something like that.
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Old 04-17-2008, 12:26 PM   #15
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throw them bitches on there for ***** and giggles, and in the mean time, source some real springs with known spring rates (eibach 2.5" for example) and buy them and swap once you get them
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Old 04-17-2008, 12:53 PM   #16
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You can get QA1 springs for... $38 a piece i think from Summit racing.
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Old 04-17-2008, 12:53 PM   #17
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^ Thats what i was gonna do. I only have blown stock shocks anyways so how much more can i **** it up by putting on these. Ill just put them on and bitch about them tom.
Im trying to save up to buy me a suspension set up, But the paint job is coming first so we will see what happens.
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Old 04-17-2008, 12:58 PM   #18
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suspension>paint
get your priorities straight homie
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Old 04-17-2008, 01:01 PM   #19
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i would never put those on my car, maybe if i was south of the border and simply cared about the way the car looked at ride height. but the bottom line is you get what you pay for, those end up seezing or with broken sleeves, spend little money get something safe and worthy of your time...
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Old 04-17-2008, 01:40 PM   #20
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Even if they have a good rate, I'd be worried about the quality of steel used for the springs. Though I know very little about springs, I'd wager they'll likely wear out very quickly and start to sag..

You could always send them to me and I'll let you know how they work.
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