I mean normally that's a good thing.... double entendre and all - but I drive a ton of highway miles for work, and I'm wishing the car was a little less tightly sprung, I had the same complaint about my 2008 ISF, which they fixed in the later years. Has anyone done coilovers on a 2015 with the intent of softening the springs without dramatically reducing the handling?

I'm not looking to lower the car at all, just would like somethign that rides a bit better than the OEM setup.

 

Yeah, I notice that as well that if you drive it at higher speed and the road is not very smooth, you will get a strong rebound effect where the chassis/suspension will not feel well damped. Since it is not my daily driver, I want to get more aggressive and stiffer sidewall tires as the OEM tires tend to deform on the sidewalls when turning aggressively.

Then again, it is a high performance luxury sports coupe so it is expected it will be firm/stiff and not buttery smooth. If you try to reduce the spring rates on the car, definitely you will sacrifice handling as the suspension needs to keep the weight as stationary as possible under aggressive steering inputs.

You can try getting softer all-season tires like the Pilot A/S 3 and it will get a bit more softer around the edges giving a more compliant ride.

 

Honestly, I'd go with a top shelf Grand Touring tire. As with most tires, the latest offerings have really upped their performance while still maintaining incredible ride and noise quality. For me personally, the RC-F is a superb GT car, so having like minded tires makes sense.

 

I'm actually using the AS3s - I thought that might help as well, and admitidly it's less noisy than the PS4 or MPSS's were but didn't help the ride much beyond that... I'm seriously tempted to throw some KWs or Ohlins on it with some better variable springs - The dampning isn't the problem in my opinion it's definitely the spring rate.

Not sure what I'll do yet, worse case I'll just keep driving it.

 

Are the roads you drive on crappy? I am finding it hard to believe that the stiffness is so unbearable that even with softer Pilot A/S 3, it is posing issues. You can probably try talking to Rafi at RR racing and I am sure they will have a solution for you with the coil overs they sell.

The 2017+ solve this problem by having AVS where you can soften the suspension in ECO/Normal modes, but it changes the damper stiffness, though.

 

Had these on my 911. These are still considered an ultra high performance tire rather than a Grand Touring tire.

You might also consider getting a slightly taller sidewall.