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Author Topic: Best Spring Rates?  (Read 4868 times)

Offline E30Dom

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Best Spring Rates?
« on: August 20, 2012, 07:51:38 am »
Does anyone know the spring rates of KW V3's or any other decent suspenison set up?

Cheers,

Dom
« Last Edit: August 20, 2012, 10:52:42 pm by E30Dom »
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Offline E30Dom

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Re: KW V3 Spring Rates?
« Reply #1 on: August 20, 2012, 11:41:32 am »
Or any way of finding out?
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Offline E30Dom

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Re: Best Spring Rates?
« Reply #2 on: August 20, 2012, 10:53:50 pm »
Think i found that VWR are 90-170 N/mm Front (progressive) and 70-170N/mm Rear (progressive)

Does this sound about right? Too stiff?
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Offline E30Dom

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Re: Best Spring Rates?
« Reply #3 on: August 21, 2012, 08:28:06 pm »
Anyone?
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Offline E30Dom

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Re: Best Spring Rates?
« Reply #4 on: August 22, 2012, 06:12:31 pm »
Is it better to go progressive or linear?

Will go 120N/mm front 100N/mm rear if Linear...
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Offline RedRobin

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Re: Best Spring Rates?
« Reply #5 on: August 22, 2012, 06:18:02 pm »
.
It doesn't answer your question directly, Dom, but I'm very happy with my VWR KW V3 ratings (dunno what they are though) and I think Mat_Ed30 has them too and I've never read anything negative about them from him.

Perhaps one of the workshops such as JKM or AKS can help answer your question which is best between progressive and linear. I guess it might depend whether you want them predominantly for track or fast road use....  I'm guessing!
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Offline Tfsi_Mike

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Re: Best Spring Rates?
« Reply #6 on: August 22, 2012, 06:19:18 pm »
My understanding is;

One of the benefits of linear is more room so increased wheel fitment choice. Less comfortable but more 'performance orientated'

Progressive, better manners on the road for daily use


I may soon be corrected though
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Offline E30Dom

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Re: Best Spring Rates?
« Reply #7 on: August 22, 2012, 06:38:16 pm »
Thanks guys, in that case I'll go progressive, and go with the ratings for the v3's / VWR set ups, and get them to valve the dampers to suit, along with plenty of adjustability...

Thanks guys! ;-)
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Offline RedRobin

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Re: Best Spring Rates?
« Reply #8 on: August 22, 2012, 06:47:09 pm »
^^^^
And I'm sure you won't have forgotten the need for proper alignment after fitting  :happy2:
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Offline GrayMK5GTI

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Re: Best Spring Rates?
« Reply #9 on: August 22, 2012, 07:21:01 pm »
Quote from: RedRobin on August 22, 2012, 06:47:09 pm
^^^^
And I'm sure you won't have forgotten the need for proper alignment after fitting  :happy2:

I left my alignment about 6 months after fitting my H&R springs before I had it set up. Needless to say, car was much sharper and had much more grip after the alignment. It's amazing how much camber you get on the rear after lowering.

Graeme
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Offline E30Dom

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Re: Best Spring Rates?
« Reply #10 on: August 22, 2012, 07:33:09 pm »
Yep, no doubt be going to APS of Brackley for alignment...
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Offline E30Dom

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Re: Best Spring Rates?
« Reply #11 on: August 23, 2012, 06:33:10 pm »
Ok after a bit more research I learnt a few more things about springs rates...

Taking the VWR kit and KW Clibsport kits which are 90-170 front and 70-170 rear, this relates to 90n/mm spring rate over free length of 170mm and rear being 70n/mm.

This equates to something 500lbs front and 400lbs rear, which after talking to David at GAZ was a stiff track setup, which the two kits quoted are...

So after some delving, and some help from Hassan at Awesome Gti, he came back with info from KW that the V3's have a spring rate of 50.56n/mm front and 44.17n/mm rear which equates to 285lbs Front/250lbs rear...

As I wanted a slightly stiffere set up between the two, I have gone with 365N/mm front and 310N/mm rear, which is some 20% up on the V3's but no where near as stiff as Clubsports...

David will set up a good window of damping adjustment around these spring rates.

Let the 3week build time commence! ;-)
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Offline Tfsi_Mike

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Re: Best Spring Rates?
« Reply #12 on: August 23, 2012, 06:50:33 pm »
Question over on yer build thread Dom  :happy2:
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Offline RedRobin

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Re: Best Spring Rates?
« Reply #13 on: August 23, 2012, 07:05:56 pm »
Quote from: E30Dom on August 23, 2012, 06:33:10 pm

Ok after a bit more research I learnt a few more things about springs rates...

Taking the VWR kit and KW Clibsport kits which are 90-170 front and 70-170 rear, this relates to 90n/mm spring rate over free length of 170mm and rear being 70n/mm.

This equates to something 500lbs front and 400lbs rear, which after talking to David at GAZ was a stiff track setup, which the two kits quoted are...

So after some delving, and some help from Hassan at Awesome Gti, he came back with info from KW that the V3's have a spring rate of 50.56n/mm front and 44.17n/mm rear which equates to 285lbs Front/250lbs rear...

As I wanted a slightly stiffer set up between the two, I have gone with 365N/mm front and 310N/mm rear, which is some 20% up on the V3's but no where near as stiff as Clubsports...


....That's interesting info, Dom  :drinking:

I know that VWR ordered 'custom' spring rates for 'their' KW V3's for my car but don't know the ratings and Mark Farmer is no longer with them.... "Hi Mark! I'm sure you remember my spring rates from over 3 years ago!?" < I don't think so!

Whatever rating they are the ride feels hard but never harsh and personally that's exactly what I want. None of that riding on a blancmange caccoon!

Not over lowering and proper alignment helps find the sweet spot.
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Offline drsilviuro

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Re: Best Spring Rates?
« Reply #14 on: August 25, 2012, 01:12:21 pm »
I just bought myself a set of VWR KW-V3 and I'm thinking now that they will be too stiff. These will replace my KW V2 which I love, but need more settings.
My car is a daily and twice a year I go to Hungaroring race track for some fun.
Can I order a custom spring for V3 to use it as day to day? Or how's the softest setting V3 compared with softest V2?
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