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RSR like/height capable coilovers

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Old Dec 6, 2020 | 03:44 PM
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Default RSR like/height capable coilovers

I have a set of Porsche RSR coilovers. They need some refurbishing. I am thinking about selling them and going with a new set of aftermarket coilovers but I am not sure what brands offer coilovers capable of operating at RSR height. My 993TT will have Rennline and Tarret control arms and BBI uprights/bump steer. The car already has RS sway bars and a RWD conversion. All the good stuff. The car is still mostly driven on the street and I am open all options.

H&R RSS coilovers appear to be exactly like OEM RSR coilovers.... disadvantage of these is of course the lack of dampening control. Not sure what H&R springs rates are like. OEM RSR coilovers would need lighter springs and re-valving to be OK on the street.

I have heard JRZ RS1s might work. Maybe KW Clubsports.

Then of course there is option of a double or triple adjustable coilovers with external reservoirs. That might be overkill for what is essentially an aggressive street car.

Looking for experience here, not conjecture or unhelpful criticism of my goals.

Jason
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Old Dec 6, 2020 | 05:09 PM
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My vote went to MCS. I went with their single adjustable set. I've been thoroughly satisfied.

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Old Dec 6, 2020 | 06:40 PM
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I had the same objective as you but only wanted to go to RS +10mm. I bought a set of KW V3 and am very disappointed. I am unable to get anywhere near this height with this combination.
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Old Dec 6, 2020 | 07:26 PM
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I have RS uprights, tie rods, sways and complete set of RS control arms/links in the rear with Elephant Racing solid subframe mounts and Walrod A arm bushings. I have KWv3 coilovers and have RS spec for alignment

Of course I did the RWD conversion as well. I will say that for a street car I am completely thrilled with the handling and steering of this setup. The whole package just feels very polished and the balance and grip is awesome.

Of course I was working within a budget given all the upgrades I've been doing.

Clubsports, JRZ, MCS or Ohlins would be nice but probably overkill for what I need.

FWIW, the Ohlins are so sweet looking - not a great reason to pick set of coil-overs but I'm a sucker.

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Old Dec 6, 2020 | 10:32 PM
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Thanks for the feedback so far. For clarification I am looking for RSR ride height.... so well below RS height.

Below is a pic of my car as it sits today. Photo credit to my friend Ryan @iris.sally.993 on IG

My car is on PSS10s but they are maxed out and outside of their range. Not ideal. Ride isnt bad though. BBi uprights are on the way and will help in front since the mounting point on the BBi uprights for the shock body is lower.

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Old Dec 7, 2020 | 01:27 AM
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I doubt you’ll find an “off the shelf” solution for your needs. It would be best to have your setup guy experiment with your current shocks without springs and run em through the range of motion. With that information he can determine if the bodies need to be shorter or longer to accommodate desired droop and bump stops. That will now serve as your “spec” for ideal body lengths. Pick the desired shocks and spec out lengths. PSI can help you with that and good base valving. I would look at the Ohlins DFV’s and if you’re really a baller TTX.

Since you’re set on a ride height spring rates will likely be higher than ideal for street to prevent the suspension from bottoming out. Getting creative with bump stops will help. Using single rate springs will be the best as well. Dual rate springs need more available travel to work.

Something else to consider is tire height. If you run a slightly taller tire it give the appearance of being more tucked while keeping the suspension geometry in a more ideal portion of its range. The car will be at a higher ride height but I don’t think that’s what your eye catches.

I know you don’t want to hear this but RSR ride height makes for a challenging street spring package. You’ll definitely be giving up performance and ride quality in exchange for looks.
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Old Dec 7, 2020 | 07:11 AM
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Originally Posted by MarinS4
I doubt you’ll find an “off the shelf” solution for your needs. It would be best to have your setup guy experiment with your current shocks without springs and run em through the range of motion. With that information he can determine if the bodies need to be shorter or longer to accommodate desired droop and bump stops. That will now serve as your “spec” for ideal body lengths. Pick the desired shocks and spec out lengths. PSI can help you with that and good base valving. I would look at the Ohlins DFV’s and if you’re really a baller TTX.

Since you’re set on a ride height spring rates will likely be higher than ideal for street to prevent the suspension from bottoming out. Getting creative with bump stops will help. Using single rate springs will be the best as well. Dual rate springs need more available travel to work.

Something else to consider is tire height. If you run a slightly taller tire it give the appearance of being more tucked while keeping the suspension geometry in a more ideal portion of its range. The car will be at a higher ride height but I don’t think that’s what your eye catches.

I know you don’t want to hear this but RSR ride height makes for a challenging street spring package. You’ll definitely be giving up performance and ride quality in exchange for looks.
Good thoughts.

My experience with my BMW M3 is that competition coilovers can make great street suspensions because the technology and adjustability that makes them so great for the track also makes them great for the street. Heavy weight springs do not always translate to terrible ride quality when paired with quality shocks and suspension setup. I know you know this. Keep in mind, I am not expecting to come out of this with an OEM like ride and that I will be giving up some, maybe a significant amount of comfort for performance.

As always, I appreciate your thoughts.
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Old Dec 7, 2020 | 08:09 AM
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I misunderstood your post. I don't think Kwv3 will get you there. Honestly, I'm not 100% sure that Ohlins has that range of adjustability. I agree with MarinS4 -- it's definitely a custom job. One thing to consider would be subframe mounts -- at least in the rear it changes the geometry by 10mm at the subframe. This should give you more flexibility with aggressive drops.




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Old Dec 7, 2020 | 08:19 AM
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Tractive works at RSR. I mean that as a criticism. Because they are idiots and designed it for RSR instead of RS. Also don't buy direct. Go through Tom@TPC. Tractive directly are incompetent morons
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Old Dec 7, 2020 | 09:29 AM
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I've had Bilstein HD's, M030 springs, swaybars, at non-USA height for 15+ years now and couldn't be happier - it handles great and isn't too stiff. The car is strictly street since I also have a track car.

I would contact Gert Carnewal and see what he recommends for you:

http://www.carnewal.com/

Last edited by SwayBar; Dec 7, 2020 at 10:00 AM.
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Old Dec 7, 2020 | 01:45 PM
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Originally Posted by rk-d
I misunderstood your post. I don't think Kwv3 will get you there. Honestly, I'm not 100% sure that Ohlins has that range of adjustability. I agree with MarinS4 -- it's definitely a custom job. One thing to consider would be subframe mounts -- at least in the rear it changes the geometry by 10mm at the subframe. This should give you more flexibility with aggressive drops.
Elephant solid subframe bushings are sitting on my shelf.

Just for clarification, I am looking for coilovers where RSR height (RSR... not RS) is inside their operational range. Obviously, RSR coilovers are the easy answer and I have set. I would imagine any competition coilover would work as well but I am curious if anyone here has experience with other brands. I am looking for feedback from individuals that have experience with coilovers running at RSR height.
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Old Dec 7, 2020 | 01:51 PM
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Originally Posted by nk993
Tractive works at RSR. I mean that as a criticism. Because they are idiots and designed it for RSR instead of RS. Also don't buy direct. Go through Tom@TPC. Tractive directly are incompetent morons
Helpful. Good advice.
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