Need Spring Rate Recommendations

Reply Subscribe

Thread Tools

Search this Thread

12-16-2011, 08:46 AM

#31

AudiOn19s

Race Car

Join Date: Jun 2005

Location: Columbus OH

Posts: 4,511

Likes: 2

Received 46 Likes on 37 Posts

Quote:

Originally Posted by The DareDevil

That's interesting. I'm guessing the alignments were the same?

Very close:
C2: -3.0 front camber / -2.5 rear camber
0 toe front / .20 degrees toe per side in the rear
tires 255 front / 295 rear
spring 450/900
H&R front sway / GT3 rear sway
8mm rake **this could be a contributer to the difference too**

GT3: -2.9 front / -2.4 rear
0 toe front / .20 degrees per side rear
tires 235 front / 295 rear
spring 600/750
OEM sways
20mm rake

Not much difference other than good adjustable shocks on the GT3. The coilover setup on the C2 was H&R's RSS Clubsport version. The actual rates were not stamped on the springs but I confirmed with both their US and German product folks those were the correct rates. They use the same bilstein damper that comes on the GT3 stock for their coilover application. The C2 still drove great and was pretty quick for as simple as the setup was, but had more understeer at the limit and didn't rotate like the GT3 does.

Andy

Reply Like

12-17-2011, 10:42 AM

#32

Leigh2

Rennlist Member

Join Date: Apr 2006

Location: Alberta, California

Posts: 1,275

Likes: 0

Received 8 Likes on 2 Posts

Quote:

Originally Posted by Chuck Price

I have 800/1000. It is pretty stiff on the street. It is great on smooth tracks, and I usually drive Watkins Glen, Mid Ohio, VIR and Road America, so it works out pretty well. I'm 95% track, 5% street with Moton Clubsport.

I have the same setup on my 6GT3, mostly track use. I was at 600/800 but changed after running VIR as the car wasn't transitioning through the S's as well as I thought it should. Much better on the track but definitely a bit stiff on the street....

Reply Like

12-18-2011, 09:24 PM

#33

The DareDevil

Addict
Lifetime Rennlist
Member

Join Date: Sep 2002

Location: Montreal, QC

Posts: 4,605

Likes: 9

Received 12 Likes on 10 Posts

Any preferred spring vendor out there? A spring is a spring, right?

Reply Like

12-18-2011, 09:35 PM

#34

FFaust

Nordschleife Master

Join Date: Dec 2009

Location: Limehouse, ON

Posts: 5,929

Likes: 50

Received 20 Likes on 16 Posts

Apparently not Derek. Get the good ones, they stay stable for years.

Reply Like

12-18-2011, 09:57 PM

#35

LC MotorSports

Former Vendor

Join Date: Jul 2011

Location: Phoenix, NY

Posts: 1,278

Likes: 0

Received 0 Likes on 0 Posts

you get what you pay for in a spring... Buy cheap and you will notice the difference.

Reply Like

12-18-2011, 10:13 PM

#36

ninerguru

Racer

Join Date: Sep 2003

Location: Central NJ

Posts: 328

Likes: 0

Received 1 Like on 1 Post

I went with http://www.hypercoils.com/ after looking around... Seems that they are used by a number of racing series...

Best deals I found were here: http://www.tntperformance.net/main.sc Shipped directly from manufacturer...

Reply Like

12-18-2011, 10:22 PM

#37

The DareDevil

Addict
Lifetime Rennlist
Member

Join Date: Sep 2002

Location: Montreal, QC

Posts: 4,605

Likes: 9

Received 12 Likes on 10 Posts

Quote:

Originally Posted by ninerguru

That's great, thanks!

Reply Like

12-19-2011, 04:12 PM

#38

The DareDevil

Addict
Lifetime Rennlist
Member

Join Date: Sep 2002

Location: Montreal, QC

Posts: 4,605

Likes: 9

Received 12 Likes on 10 Posts

Other than making some more room for a wider tire, is there any reason I should go with smaller spring (in terms of diameter)? I was planning on sticking with 60mm I.D so that I can reuse the stock perches.

Reply Like