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most aggressive FD spring rate for Koni Yellow Sports

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most aggressive FD spring rate for Koni Yellow Sports

Old 11-06-06, 09:31 AM
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most aggressive FD spring rate for Koni Yellow Sports

What is the most aggressive FD spring rate Koni "yellow" shocks (front & rear) can control ?

I have a Tri-Point front sway-bar, stock rear-bar, and run 265/45R16 Kumho V710's for both autocross and trackdays.

I was thinking perhaps 600# front and 400# rear springs, but I'd like to know what the Koni Yellow's can control under their full stiff setting.

:-) neil
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Old 11-06-06, 09:49 AM
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Plenty of people run the 550/450 combo, so i'm sure 600/400 would be fine.
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Old 11-06-06, 10:00 AM
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Who makes these 550/450 springs that use the stock spring mount ?

:-) neil
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Old 11-06-06, 10:39 AM
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You could probably get those with the Ground Control Coilover set.
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Old 11-06-06, 11:00 AM
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Nobody as far as I know. M2 had a set of stock replacement springs at the 550/540 rate for a while, but I doubt you can still get them.

Just get the GC set. Then you can adjust height and change rates.


Originally Posted by M104-AMG
Who makes these 550/450 springs that use the stock spring mount ?

:-) neil
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Old 11-07-06, 09:40 AM
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from my knowledge.....with out revalving you cant go above 600lbs..and you need to keep the shock setting to the firmest setting.
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Old 11-14-06, 10:32 AM
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The RSR race springs are about 440 front 390 rear (5kg/mm front 4kg/mm rear???) and work fine with the Koni shocks and stock mounts.
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Old 11-14-06, 10:51 AM
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http://www.swiftsprings.com/
maybe they have what you need.
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Old 11-16-06, 03:02 PM
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Originally Posted by John Magnuson
The RSR race springs are about 440 front 390 rear (5kg/mm front 4kg/mm rear???) and work fine with the Koni shocks and stock mounts.

that's what run. feels great, but kinda squishy.
time for coilovers for me
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