Has anyone replace the stock Evo X KW V3s coilover springs for something else?

The stock KWs V3 spring specs are KW 90 200* GAYC and KW 80 170* GAYC, I believe that the KWs springs inner diameter is 62mm???? I don’t see any companies selling 62mm ID springs…

So I believe that as a replacement springs I need:
Front = 2 (10K ~500lb rate) (200mm/ 7.87inches length) and (62mm/2.44inches ID).
Rear = 2 (11K ~600lb rate) (170mm/ 6.69inches length) and (62mm/2.44inches ID).

Anyone knows any springs available on those specs or as close as possible.

Thanks!

 

60mm springs fit...we use Swifts and Hyperco all the time. Call us if you need some.

- Andrew

 

I must admit that I'm really confused by the first post in this thread (although the idea of getting in touch with Andrew makes tons of sense). My understanding is that the longer and stiffer springs are in the rear. I believe that the default set-up on KW V3s is 8k / 170 mm springs in the front and 9k / 200 mm springs in the rear. So I don't understand why the OP is thinking about a 10/200 for the front and an 11/170 for the rear. Also, when you stiffen the springs, you often have to go with a shorter spring. Maybe a 2k increase is not enough to force you to shorten the free length, but it could be.

 

I know something of this as we run KW and I have several sets of springs. Andrew looks like a good source. KW has sent us multiple sets as we will swap them for different tires. (softer compounds run a stiffer spring). I think we have a set of Hypercoils too. 62 or 60 they all fit. All sets of fronts are the same length, same with the rears, regardless of rate. (if they are different I can't tell by looking). Right now the car sits on 650F/700R.

 

But the longer springs are for the rear, right?

 

Yes, KWs V3 spring specs are:
Front = KW 80 170* GAYC
Rear= KW 90 200* GAYC

I am looking for:
Front = 2 (10K ~500lb rate) (170mm/ 6.69inches length) and (62mm/2.44inches ID).
Rear = 2 (11K ~600lb rate) (200mm/ 7.87inches length) (and (62mm/2.44inches ID).

 

OK. Phew. Now it makes sense. And most coilovers can handle a 2k increase in spring-rate. Carry on!

 

Do you run KW V3s or Clubsports? I wish the F&R length was the same so I could test different rates.

 

Take a look at where you have the height/pre-load adjusters set to right now. If you have some room to move the rears up or to move the fronts down, then you could choose a new length that's the same for the front and rear. Just keep in mind that you'll have to set them a little lower to maintain the same ride-height with stiffer springs.

The only thing that might stop you from doing this is coil-bind. And that's where an expert with direct experience - cue: Andrew - comes in.

 

No, all the springs that KW sends me are front or rear, I just checked.

The rates are close enough it doesn't matter (according to them).

We use KW RobiSpec Race. Different valving and such but they use the clubsport body.

 

You can, we do it all the time.

 

Agreed, we don't intentionally create coil bind through spring rates or length (it can help with grip). I can also say that we've not had any problems bottoming springs out. It seems the 170 mm springs are long enough in the rear such that when the car is set at our ride height (relatively low - control arms flatish) there's enough spring at the front and rear. As we exchange front to rear we can carry fewer springs and then swap the rears for fronts as needed.

 

Yep, mostly though we set the ride height based on the tire, wheel (caster and camber) and control arm set up. Then we corner balance the car to get the numbers dialed in. This process, of course, raises or lowers one corner or another a couple of mm, as needed to get the F/R and Cross balance of the car right for the track.

 

Hate to hijack a thread but oh well... I have a set of KW V3's on my M3 haven't been uber satisfied with them. I was contemplating running the robispec's but I don't see many people using them or hear of any reviews worth while. From my understanding they are softer in the front and stiffer in the rear? Anyone use them for track on a regular basis? thoughts?

Thanks and sorry

 

The RobiSpec is different valving in the V3, same spring rates. I'm not sure how the M3 is set up, but the V3 for the Evo X is generally F8K, R9K and Robis are no different. Many do (as is the nature of this thread) change those spring rates depending on their application.

We run the RobiSpec Race version which is a further revalved, rebuilt club sport body from KW, and run a variety of different springs based on tires and tracks. They work vary well. Are there better options? Sure, JRZ and Motec 3 ways - probably others too. But, these are very good. Robi (Robert Fuller) is very highly regarded though not always easy to contact, as he travels all over the world doing race car set up (really, I picked him up once at the airport as he was flying in from an installation and set up in Ghana. I've found that when we need him, he's available and very helpful.