 Spring rate advice |
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| BlueRidge914 |
 Sep 17 2024, 06:25 AM
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#1
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Newbie  Group: Members Posts: 12 Joined: 18-January 21 From: Ontario, Canada Member No.: 25,093 Region Association: None  |
I’d be grateful for some spring rate advice for my vintage race 914.
It’s a narrow body 2L six, 205/50 tires all around. Front torsion bars with adjustable sway bar. Rear is Bilstein Sports with adjustable spring perches, and a fixed sway bar. My personal preference leans to a relatively softer spring all around. Any recommendations for both torsion bar size and rear spring rate? Thanks! Gavin VARAC #58 |
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| slivel |
Sep 18 2024, 02:26 PM
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#2
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Old car....... older driver Group: Members Posts: 535 Joined: 10-July 04 From: San Diego Member No.: 2,332 Region Association: Southern California |
I believe that you get performance gains by going as stiff as possible but not so stiff that you are bouncing over rough pavement. Stiffer helps to prevent front end dive under braking and rear end squat under acceleration while keeping the balance close to what the chassis has statically.
The tracks that I frequented were pretty smooth and I did not feel like changing out my suspension from track to track. Final race configuration for my car had 450 front and 400 rear. The car and driver are now retired and I have softened the suspension by using stacked springs giving me a progressive rate. For what it's worth, I'll attach my spec sheet and a suspension worksheet. 
1975_Porsche_914rev16.pdf ( 69.19k )
Number of downloads: 1828
Suspension_for_914_world.pdf ( 200.22k )
Number of downloads: 2178 |
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Posts in this topic
BlueRidge914 Spring rate advice Sep 17 2024, 06:25 AM
brant What diameter front torsion springs do you have?
... Sep 17 2024, 01:32 PM BlueRidge914 It was more than twenty years ago since I installe... Sep 17 2024, 07:15 PM
campbellcj
I believe that you get performance gains by going... Sep 23 2024, 01:47 PM yeahmag What type of racing? What tires? Do you have an LS... Sep 20 2024, 03:31 PM BlueRidge914 Tires are 205/50x15 all around, treaded - no slick... Sep 23 2024, 05:02 AM BlueRidge914 That is great advice - thanks. And sort of what I ... Sep 23 2024, 03:48 PM yeahmag I think what Chris says is a good place to start. ... Oct 2 2024, 04:47 PM |
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