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softer ride

Originally Posted by SINISTER Why is the rear spring rates stiffer on our cars? Nismo Spring Rates: F - 8.6kgf/mm (480lbs/inch) R - 9.3kgf/mm (520lbs/inch) Then when looking at coilover

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Old 04-17-2017, 09:58 PM   #1 (permalink)
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Why is the rear spring rates stiffer on our cars?
Nismo Spring Rates:
F - 8.6kgf/mm (480lbs/inch)
R - 9.3kgf/mm (520lbs/inch)

Then when looking at coilover options like powertrix the spring rates flip?
Using swifts F-12 R-11

I suppose it has to do with the OEM damper valving...but seems like I read long ago that most rear wheel drive cars would/should have stiffer spring rates in the front.
I suppose our cars ride is maybe a clue. With fairly low spring rates in general in the front and rear... the harshness of the ride must be in the way the engineers tuned the valving in the dampers? ...so perhaps this is why the spring rates are stiffer in the rear and less in the front on our cars. However, when you switch to coilovers the valving is more "normal" and spring rates then switch back to a more agreed upon normal of stiffer in front and less stiff on the rear?
I have a 2012 nismo and it beat me up on the streets. so I really paid attention to what I was feeling going over these bumps. what I figured out was the *** end was the main problem. my remedy was simply replace the rear shocks (Dampers) with a stock set of sport dampers. night and day difference in the way it feels on the roads now. smoothed out the jarring effect going down the road. found a set on here for $25.00. totally happy with it now. no height change, no alignment cost just pure pleasure.
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Old 04-17-2017, 11:18 PM   #2 (permalink)
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I have a 2012 nismo and it beat me up on the streets. so I really paid attention to what I was feeling going over these bumps. what I figured out was the *** end was the main problem. my remedy was simply replace the rear shocks (Dampers) with a stock set of sport dampers. night and day difference in the way it feels on the roads now. smoothed out the jarring effect going down the road. found a set on here for $25.00. totally happy with it now. no height change, no alignment cost just pure pleasure.


You know, this is a great idea if I ever go on road trips. It's also incredibly easy to do.


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Old 04-24-2017, 07:48 PM   #3 (permalink)
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Originally Posted by pearlwhite1 View Post
I have a 2012 nismo and it beat me up on the streets. so I really paid attention to what I was feeling going over these bumps. what I figured out was the *** end was the main problem. my remedy was simply replace the rear shocks (Dampers) with a stock set of sport dampers. night and day difference in the way it feels on the roads now. smoothed out the jarring effect going down the road. found a set on here for $25.00. totally happy with it now. no height change, no alignment cost just pure pleasure.

I am going to try this too....just PM'd you.
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Old 04-25-2017, 02:58 AM   #4 (permalink)
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Originally Posted by pearlwhite1 View Post
I have a 2012 nismo and it beat me up on the streets. so I really paid attention to what I was feeling going over these bumps. what I figured out was the *** end was the main problem. my remedy was simply replace the rear shocks (Dampers) with a stock set of sport dampers. night and day difference in the way it feels on the roads now. smoothed out the jarring effect going down the road. found a set on here for $25.00. totally happy with it now. no height change, no alignment cost just pure pleasure.
I'll give you $25 for the Nismo shocks you swapped out
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Old 05-12-2017, 09:11 AM   #5 (permalink)
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I have a 2012 nismo and it beat me up on the streets. so I really paid attention to what I was feeling going over these bumps. what I figured out was the *** end was the main problem. my remedy was simply replace the rear shocks (Dampers) with a stock set of sport dampers. night and day difference in the way it feels on the roads now. smoothed out the jarring effect going down the road. found a set on here for $25.00. totally happy with it now. no height change, no alignment cost just pure pleasure.
Thanks for this tip ...I changed mine out yesterday and this is exactly what I was looking for.
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Old 05-14-2017, 09:31 AM   #6 (permalink)
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yeah I am still running this setup. it is perfect for the nasty roads here in cali. I kept the stock shocks just in case I felt I needed to go racing someday. anyway I have always had rear wheel drive cars and my butt dyno tells me to keep it stiff up front and a little softer in the rear (with in reason) based on total horsepower you have to work with. (come in hot and leave with everything you got.) ha ha or something like that

Last edited by pearlwhite1; 05-14-2017 at 09:35 AM. Reason: miss spelled
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