Aftermarket & custom coilover springs

[Matej]

Good day gentlemen,
Can anyone recommend me companies that offer aftermarket coilover springs in various sizes and rates, or make custom ones?

Here is the list I have so far:
Swift
Hyperco
H&R
Tanabe PRO210
Tein
Blue Coil

And here is a convenient converter for the spring rates, since various brands rate their springs in various units:
Spring Rate Converter


What I am looking for specifically is 60mm ID, 165-170mm length, and 8kgf/mm rate, and possibly also another pair in 10kgf/mm rate.

Swift offers 60mm ID springs but will not make a custom length. I am awaiting reply from Hyperco. Want to contact H&R but they do not list an email address on their website and I dislike describing things over the phone. Also awaiting reply from Blue Coil. Tanabe PRO210 were made in both the sizes and rates I want, but are discontinued and seem to be sold out everywhere.

Are there others to be looked into? It does not matter if they are a popular brand name or a small shop.
Thank you for any input.

[lflkajfj12123]

Swift Metric Coilover Main Springs 60mm (2.36") ID 6" Length Each

.5 inch less than what you're looking for...

[Matej]

Wish Swift would offer half-inch lengths (and ideally nice round centimeter lengths), not only full inch, because their springs are the coolest for sure.

Hyperco just replied stating that custom springs are no problem, but they will not be able to give me a quote until next week, because they are doing track testing or some such race car stuff right now.

[lflkajfj12123]

May I ask sir, why do you need a 6.5 inch spring?

I would be trying to acquire the shortest spring I can and if it ends up too low raise it on the coilover adjustment.

[Matej]

Because having to thread the other collars back on and adjusting both sides to be equal again is too great of an annoyance.
Although I will have no choice but to resort to that if my spring search proves fruitless.

Is Swift supposed to be the the best? Because if I do end up having to labour so, I may at least do it for quality product.

[2iv0 sx]

I'm looking into buying shorter coilover springs also, lets say.. Swift

My question is, how would I find the right size spring to fit my coilovers? (what are they measuring?)

[lflkajfj12123]

Swift is the best in my opinion. If I were you and had a silly idea like this one, I would buy the 7" ones and cut them. It won't affect their performance or whatever because the spring rates are linear.

[matts13vert]

Originally Posted by 2iv0 sx

I'm looking into buying shorter coilover springs also, lets say.. Swift

My question is, how would I find the right size spring to fit my coilovers? (what are they measuring?)

i.d. of your current springs need to be the same as the new ones.

[essforteen]

why does everyone forget Eibach! They make many coil-over springs

[Karlitos]

Yep its all about eibach and ground control.

[Matej]

Originally Posted by 2iv0 sx

I'm looking into buying shorter coilover springs also, lets say.. Swift

My question is, how would I find the right size spring to fit my coilovers? (what are they measuring?)

Depends on the brand and model of your coilovers. Do the springs have any markings on them? Chances are they will take the 65mm. It is no big deal to run springs with a slightly larger inner diameter. But if they can take 60mm I would say go for it, because snug is nice. The best thing to do would be to measure the 'inner-outer' diameter of the spring seat perches.

For example, my Megan coilovers came with 62mm ID springs stock. I am currently running Stance springs in them which are either 2.5" or 65mm ID, I forget which (2.5" and 65mm may actually be the same size in coilover spring world). Even Megan says to get the 65mm springs if upgrading to Swift, but I just found out that my coilovers can actually fit 60mm springs, so I am going with that because I would much rather have them snug.

[2iv0 sx]

Originally Posted by matts13vert

i.d. of your current springs need to be the same as the new ones.

So the ID would be the diameter of the spring pretty much?

Originally Posted by Matej

Depends on the brand and model of your coilovers. Do the springs have any markings on them? Chances are they will take the 65mm. It is no big deal to run springs with a slightly larger inner diameter. But if they can take 60mm I would say go for it, because snug is nice. The best thing to do would be to measure the 'inner-outer' diameter of the spring seat perches.

For example, my Megan coilovers came with 62mm ID springs stock. I am currently running Stance springs in them which are either 2.5" or 65mm ID, I forget which (2.5" and 65mm may actually be the same size in coilover spring ID world). Even Megan says to get the 65mm springs if upgrading to Swift, but I just found out that my coilovers can actually fit 60mm springs, so I am going with that because I would much rather have them snug.

Got'cha... I'll have to take apart my coils and get measuring then

Thanks for this thread I've been wondering about this for awhile now

[homeslicej2]

Whether the springs have a linear rate or not, you should never cut them (or heat them up). Reducing the number of coils in the spring will affect it's performance and can affect rate. Also, if you've ever looked at springs (coilover springs or regular ones designed for struts/shocks) they are flattened at the end of the last coil on the top and bottom so that they seat properly. If you cut this off, you then have to mod the spring to flatten it so it'll function properly within the coilover/strut, which could also affect it's rate. Matej, don't forget that once you install the springs, even if they are the exact length you want, they will probably settle a bit over the first few hundred miles. This means you will have to adjust the ride height a bit anyway. I would go with the closest length Swift springs, set it to ride height and align, drive for 1-2 thousand miles and then re-adjust and align it.

[Irresistible]

Originally Posted by 2iv0 sx

So the ID would be the diameter of the spring pretty much?



Got'cha... I'll have to take apart my coils and get measuring then

Thanks for this thread I've been wondering about this for awhile now

ID is the inner diameter.... so yes.

[Matej]

P.S.
Are the the 60mm Swift springs the blue ones and the 65mm the orange? Not that it matters, just curious if that is how they are distinguished.

[2iv0 sx]

60mm=blue
65mm=orange
70mm=green

[icedsole]

swift makes a 6" spring. thats plenty short, swift springs are awesome. buy some

Swift coilover springs - SPL PARTS

cawp from spl just over 300 to get your car hooked up and sittin pretty

they also sell sweet little rings that help the spring not bind as bad

[Matej]

These gentlemen definitely have the most convincing website.
Coil Springs,high quality coiled suspension springs from coil springs

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[!Zar!]

I see a RBR car on the front page.

Reason enough. haha. Their marketing works.