Quote:
Originally Posted by Spooler
NP, I don't know much about helper springs. The only issue with the spring rates is it is the exact opposite of what other folks use that track and autocross. Got me puzzled a bit.
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Right, in this case HKS made the factors dependent on spring length (which is the correct way of doing this). As noted in the photo's but not by description. The front spring looks to be longer than the rear (which isn't the norm). It also looks to have a longer max stroke length as well. Because of this, it still has a higher total load rating than the rear. Making it in line with the oem weight balance and capacity.
Making a guesstimate on sizes...
Front spring is probably a 8 inch spring , with a maximum of 5 inches of stroke. And the rear looks to be about an inch shorter.
So..
14kg/mm x 122mm(4.8") =1708kg front
16kg/mm x 101mm (4.0") = 1616kg rear
(max load capacity per spring based on max spring stroke)
Exact rates here -
Swift Springs USA
This still matches the oem weight balance and also matches the motion ratios as well. At 2 inches of compression, the front will need about 1568ibs, the rear will need about 1792ibs.
Apologies in advance for getting technical. I think HKS did a good job matching the rates appropriately.