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

Bc coilover swift springs

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Old 05-31-18, 11:35 PM
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OneFastF
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Default Bc coilover swift springs

I can say that this combo is doing extremely well in terms of comfort! Although I rubb a ton on rough canyon roads, and bounce a lot!!!! Especially when going over uneven roads on the freeway!

Car is low enough where the wheel is tucking under the fender just a tad. (Im fine lifting it up for a one finger gap)

Rate: 22k/18k

​​​​​Front Clicks: 30
Rear Clicks:26

I want to know what People have done in terms of canyon tuning the car, I'm not so worried about how firm it is, I'm worried about the fact that it bounces like crazy at 60mph!

Also, I still understeer.... a lot. On the stock wheels setup, but now I have a F Sport Rear sway bar. Any way to neutrai the car or should I just slap on my 18x9.5 265s?
Old 05-31-18, 11:36 PM
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OneFastF
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ADDED NOTE:

PRELOAD - What do you guys have that set to prevent bouncing at highway speeds? ( only rough roads)

nothing wrong with the suspension parts too.
Old 06-01-18, 02:08 AM
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bnizzle87
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Wow! 22k/18k would be way too stiff for me. I went with the BC and Swift combo that FIGS recommended, and I left it all at full stiff at all corners. Hardly any rubbing, except on deep dips the rare speed bump, and passengers actually commented on how smooth it rides at full stiff. I would love to see how 22 and 18 perform on the track, though.
Old 06-01-18, 01:56 PM
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Vervish
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I run the 16/12 rates and there is no bounciness at all. Maybe you need to turn up stiffness on shocks?
Old 06-02-18, 01:04 AM
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OneFastF
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Originally Posted by Vervish
I run the 16/12 rates and there is no bounciness at all. Maybe you need to turn up stiffness on shocks?
I run them with fairly high clicks, the harsh bounce only happens over uneven roads like sine wave, I will be rising my car up and giving it a finger gap, and adjust preload all aides, and run different settings.
Old 06-05-18, 09:14 PM
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Sylvan
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I hated my BCs they were so bouncy it made the car feel unsettled, I changed parts, bought toe arms, traction arms, adjusted and messed with it constantly I improved it a bit but it was still a poor ride. The worst mod I have done to any car I have owned was BCs on the ISF.
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