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Main Spring Help, spring rate and length recommendation?

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Old 05-06-2011, 03:57 PM
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bavarian06
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Exclamation Main Spring Help, spring rate and length recommendation?

Can anyone with past racing setup experience please share what spring rates they use?

I have a track/DE 993 C4S. It will serve mainly track sessions but it will have to semi-road worthy since I have to drive to the events (I won't be using slick tires). I want to change up the front springs since they are too short and too stiff. The car is setup with Moton Coilovers with 1150lb 5" Eibach rear springs + 150lb tender springs. Can anyone recommend what front springs I can use to pair up with the rear? I was thinking 6" 1050lb or 950lb for greater ride height adjustability in the future with 150lb front tender springs.

Thanks!
Old 05-07-2011, 02:08 PM
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Steve Weiner-Rennsport Systems
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900 or 950's would be the appropriate front main springs to match the rears.
Old 05-07-2011, 03:08 PM
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bavarian06
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Originally Posted by Steve Weiner-Rennsport Systems
900 or 950's would be the appropriate front main springs to match the rears.
Thanks Steve.

Is it necessary to match up the springs lengths front to back? Since the lengths do effect travel distance. So meaning both springs have to be 5" long or is ok to do 6" front and 5" rear.
Old 05-07-2011, 05:43 PM
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Steve Weiner-Rennsport Systems
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Originally Posted by bavarian06
Thanks Steve.

Is it necessary to match up the springs lengths front to back? Since the lengths do effect travel distance. So meaning both springs have to be 5" long or is ok to do 6" front and 5" rear.
6" is the proper one for the front in your situation. The rears are shorter.
Old 05-13-2011, 01:04 AM
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bavarian06
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thank you for the input!

i'm going to try this setup for a while, hopefully its not too stiff. the car weighs 2900lbs wet, is a FRONT 950main+150tender/ REAR1150main+150tender a decent setup?



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