IS F (2008-2014) Discussion topics related to the IS F model

DAILY Driving on 16kg/12kg spring setup

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Old 08-03-12, 12:04 PM
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MWhit02
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Default DAILY Driving on 16kg/12kg spring setup

So I'm trying to figure out what spring rates to order on my BC coilovers, and I was wanting to know from people who chose the 16kg front/12kg rear setup how the car rides on normal city streets.

This is my wifes car, and I dont want the car to ride so stiff it rattles her fillings out.


The other option I was considering were the 14kg front/10kg rear setup as long as I can still drive with the fenders barely above the wheel lips.
Old 08-03-12, 12:34 PM
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ERDoc74
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That is the spring setup that I purchased on my BCR's (swift springs) and I'm scheduled for delivery this monday (3 days). Will be having them installed one week from today. So if you're not in a hurry, I'll report back my impressions after install.
Old 08-03-12, 01:07 PM
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CalitriSC
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It will ride softer than stock for sure.
Old 08-03-12, 01:27 PM
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LiLS
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Originally Posted by CalitriSC
It will ride softer than stock for sure.
16k and 12k is softer then stock????

most coils made for our cars is 14/10 i believe...

i went ahead nad got the 16k and 12k also and my dampening is at 20 clicks and it rides awesome to me...
Old 08-03-12, 01:30 PM
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MWhit02
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Originally Posted by LiLS
16k and 12k is softer then stock????

most coils made for our cars is 14/10 i believe...

i went ahead nad got the 16k and 12k also and my dampening is at 20 clicks and it rides awesome to me...
20 clicks from full stiff?
Old 08-03-12, 02:09 PM
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lobuxracer
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Springs don't make the car stiff at these rates. The shocks make the suspension stiff. Springs resist roll, and the F could definitely use more roll control from the front end to keep the rear wheels on the ground in hard turns.
Old 08-03-12, 02:41 PM
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LiLS
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Originally Posted by MWhit02
20 clicks from full stiff?
10 from full stiff, but now i ride 2 from full stiff with 0 preload cause my rims are aggresive
Old 08-03-12, 02:51 PM
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CalitriSC
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Originally Posted by LiLS
16k and 12k is softer then stock????

most coils made for our cars is 14/10
Yes those are not high spring rates for a car that's 3800 lbs. the BCs on my SC has higher rates than that and its only 3600 lbs. I also know someone that has BCs on their F with those standard rates. And he said its softer than stock.
Old 08-03-12, 04:52 PM
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caymandive
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I have the 16/12 spring combo on my BC's and love it. I am 10 clicks down front and rear for the dampening. The car at full damping is way too harsh for me. As is, the car rides very similar to stock with a little less jumpiness on uneven surfaces.

https://www.clublexus.com/forums/6427594-post113.html

Last edited by caymandive; 08-03-12 at 04:56 PM.
Old 08-03-12, 04:53 PM
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LiLS
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Originally Posted by CalitriSC
Yes those are not high spring rates for a car that's 3800 lbs. the BCs on my SC has higher rates than that and its only 3600 lbs. I also know someone that has BCs on their F with those standard rates. And he said its softer than stock.
what would you recommend for very stiff
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