nate42's Profile
Lots of talk about coilovers/lowering springs and all the posts normally come down to personal preference. So I thought it would be a good idea to collect some info for those looking to buy a set of coilovers or lowering springs.
I can update this first post when you post info on this thread. Spring rate is not always straight forward, if it's progressive I think we can collect the final rates before the spring closes. Helper springs are normally fully compressed so I think it is useless to collect that data.
SI-units are the easiest so we will use those. I can convert if you have lbs/in or some other values. Kg/cm (N/mm also) seems to be the most common so will use that. Newtons (N) are also used here approximation 10N ~ 1kg is close enough.
Damping is another thing that effects a lot, but I think it is enough just to collect if there are adjustable dampers or not. Damping explains why some coilovers can feel harder even they have softer spring rate, but spring rate is a good starting point in decision making.
If someone has a bench to measure stock springs that would be great too.
Here we go, in alphabetical order for Mk1 TT Quattro:
Make:AP
Model:
Product number: GF10-041
Front spring rate: 70 kg/cm
Rear spring rate: 60 kg/cm
Adjustment: height (F/R)
Make: AST
Model: 4100
Product number: 4622S-0014-M1
Front spring rate: 70 kg/cm
Rear spring rate: 80 kg/cm
Adjustment: height (F/R), Rebound (F/R)
Make: Bilstein
Model: PSS9
Product number: 48-080422 / F4-GM5-8042-H6
Front spring rate: 65 kg/cm
Rear spring rate: 117.5 kg/cm
Adjustment: height (F/R), Rebound (F/R)
Make: GAZ
Model: GHA/GGA
Product number: GHA336/GGA436
Front spring rate: 58 kg/cm
Rear spring rate: 80.4 kg/cm
Adjustment: height (F/R), GGA rebound also (F/R)
Make: H&R
Model: Street
Product number: 29431-1
Front spring rate: 65 kg/cm
Rear spring rate: 108 kg/cm
Adjustment: height (F/R)
Make: H&R
Model: Comfort
Product number: 29431-2
Front spring rate: 65 kg/cm
Rear spring rate: 90 kg/cm
Adjustment: height (F/R)
Make: H&R
Model: Twin-tube
Product number: 35431-1
Front spring rate: 60 kg/cm
Rear spring rate: 114 kg/cm
Adjustment: height (F/R), rebound (F/R)
Make: KW
Model: Variant 3
Product number:
Front spring rate: 81.3 kg/cm
Rear spring rate: progressive, rate unknown
Adjustment: height (F/R), rebound (F/R), compression (F/R)
Make: KW
Model: Clubsport
Product number:
Front spring rate: 101.9 kg/cm
Rear spring rate: progressive, rate unknown
Adjustment: height (F/R), rebound (F/R), compression (F/R)
Make: ST Suspension (KW sub brand)
Model: Coilover kit
Product number: 90830
Front spring rate: 70 kg/cm
Rear spring rate: unknown (marked: 8012 14E11)
Adjustment: height (F/R)
Make: Weitec (KW sub brand)
Model: Hicon GT
Product number: 13210041
Front spring rate: 70 kg/cm
Rear spring rate: progressive spring approx. 110 kg/cm
Adjustment: height (F/R)
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Spring rate info - going for stiffer springs experiment
Moderators: John-H, DXN, Ikon66, T3RBO, Hoggy
28 posts
• Page 1 of 2 • 1, 2
 Too Much Time On My Hands  
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 Posted: 07 Mar 2012, 11:55
Last edited by nate42 on 26 Jul 2013, 06:05, edited 6 times in total.
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Too Much Time On My Hands
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Posted: 08 Mar 2012, 06:54
KW's have so far the hardest springs that probably was not a suprise to anyone who has driven a car with KW coilovers
 Here is spring rate explained 
Last edited by nate42 on 08 Mar 2012, 07:02, edited 1 time in total.
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Posted: 08 Mar 2012, 06:59
Nate i tip my hat to you sir
![[smiley=toff.gif]](./images/smilies/toff.gif "toff") .... exellent idea this thread. Would be fantastic to have information one page for reference and comparison! Damien.    SADLY GONE, BUT NEVER FORGOTTEN |
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Too Much Time On My Hands
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Posted: 08 Mar 2012, 07:05
Sent a PM to AwesomeJohn as he is selling quite many brands of springs and coilovers, I hope he can fill in the data for Weitec, AP, FK.
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Posted: 08 Mar 2012, 07:11
I'm sure he will help but he is off for a week so don't expect a quick reply
 Donald Trump. A (dangerous) Fool On The Hill |
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 Too Much Time On My Hands
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Posted: 12 Mar 2012, 17:25
I take my time but i get there in the end!
 Make: AP Model: Product number: GF10-041 Front spring rate: 70/170 N/mm Rear spring rate: 60/130 N/mm Adjustment: height (F/R) Make: Weitec Model: Hicon GT Product number: 13210041 Front spring rate: 70 N/mm Rear spring rate: progressive spring approx. 110 N/mm Adjustment: height (F/R) Still working on FK but i'll get to the bottom of it as quick as i can. Stage 2 remap, Pipe Werx turbo back system with single tail pipe! Forge TIP, DV, Neuspeed P-flow kit, LCR top suspension mounts, R32 roll bar kit, Full Super Pro polly bush set with caster adjustable front bushes, Bilstein B6 shocks, H&R springs, Tarox discs and pads all round, Goodridge brake hoses, 20mm FK rear spacers, Lcr front splitter, OSIR smoked corners, Black front badge, Debadged, V6 style rear valance single exit, V6 rear spoiler, TT QS reps in anthracite!Gone but not forgoten!
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AwesomeJohn's Website
Too Much Time On My Hands
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Posted: 13 Mar 2012, 06:27
Excelent, thanks John!
Those AP's have progressive springs also? I'm quessing that first number is the starting rate and the last one just before the spring closes. |
Too Much Time On My Hands
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Posted: 13 Mar 2012, 16:44
That's what i thought but the second number is actually the length of the spring off the vehicle!
Stage 2 remap, Pipe Werx turbo back system with single tail pipe! Forge TIP, DV, Neuspeed P-flow kit, LCR top suspension mounts, R32 roll bar kit, Full Super Pro polly bush set with caster adjustable front bushes, Bilstein B6 shocks, H&R springs, Tarox discs and pads all round, Goodridge brake hoses, 20mm FK rear spacers, Lcr front splitter, OSIR smoked corners, Black front badge, Debadged, V6 style rear valance single exit, V6 rear spoiler, TT QS reps in anthracite!Gone but not forgoten!
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 Too Much Time On My Hands
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Posted: 13 Mar 2012, 19:47
My ride
 BRM 2.0 stroker 431BHP/404 lb/ft |
TT Owners Club Member
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Posted: 13 Mar 2012, 20:38
I find them quite comfy
 190 Coupe. Black. KW v3. KW ARB. Alpine IDA X305s. Was number plate LED lights. RS4 B7 steering wheel. Gearbox rebuild. OZ Racing Alleggerita HLT (MB), V6 bumper (front), Brembo GT BBK (front), Cupra R brake kit (rear). Few more mods to come. |
Too Much Time On My Hands
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Posted: 14 Mar 2012, 06:59
I bet that is one nice coilover setup for serious driving  Do you have any pics of your coilovers? I think would be great addition to this thread.
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Too Much Time On My Hands
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Posted: 14 Mar 2012, 07:06
What version you have V1/V2/V3? They might come with different springs. Car weight, ARB's and damper settings also effect alot, good you like them
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Too Much Time On My Hands
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Posted: 14 Mar 2012, 07:16
Old and bad quality pics of AST 4100
   
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Too Much Time On My Hands
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Posted: 14 Mar 2012, 09:25
Propper job, seriously expensive but just about as good as you can get! ![[smiley=thumbsup.gif]](./images/smilies/thumbsup.gif "thumbsup")
Stage 2 remap, Pipe Werx turbo back system with single tail pipe! Forge TIP, DV, Neuspeed P-flow kit, LCR top suspension mounts, R32 roll bar kit, Full Super Pro polly bush set with caster adjustable front bushes, Bilstein B6 shocks, H&R springs, Tarox discs and pads all round, Goodridge brake hoses, 20mm FK rear spacers, Lcr front splitter, OSIR smoked corners, Black front badge, Debadged, V6 style rear valance single exit, V6 rear spoiler, TT QS reps in anthracite!Gone but not forgoten!
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Too Much Time On My Hands
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Posted: 26 Mar 2012, 12:01
Added Bilstein PSS9
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28 posts
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