FYI, Ground-Control offerings for the S550

Discussion in 'Suspension, Brakes & Chassis' started by madsedan, Jul 15, 2016.

  1. madsedan

    madsedan Well-Known Member

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    Ground-Control should have their line of parts up for the S550 in the next couple of weeks. For anyone that isn't familiar with them they are very popular with the autocross and road-racing groups for making great basic and complete coil-over kits. They are big on Koni's and I'm sure that had something to do with their delay in releasing bits.

    I have run their basic and complete coil-over kits on several of my M3's over the years and they are great and GC has great customer service. I was able to specify what spring rates I wanted with my kit and also buy extra springs of different rates in order to swap out for HPDE weekends and daily driving duty.
     
  2. Competition Orange

    Competition Orange Well-Known Member

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    This is excellent news. Their prices are usually good too.
     
  3. OP
    OP
    madsedan

    madsedan Well-Known Member

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    Agreed, I would expect a solid kit with camber plates in the $1,800 range and it will be quality.
     
  4. qtrracer

    qtrracer Well-Known Member

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    Not a huge fan of the material GC uses for their CO pieces. Mine tends to corrode making it difficult to adjust over time. The MM pieces I use don't corrode. I'm also not a fan of the SA Konis. Had better luck with Bilsteins.
     
  5. tyshenry

    tyshenry Well-Known Member

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    Ive been emailing with them for a little over a month now trying to figure out when they will be releasing the coilovers and camber plates. They are redesigning their camber plates, so I am not sure they will be available in the next couple weeks. Maybe the coilover kit though.
     
  6. Nick610s

    Nick610s Well-Known Member

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    I have been in touch with them as well. They are waiting for their machine shop to finish the camber plates as they are a complex piece for our cars. Also, the koni shocks being used are not the OTS variety as I've been told. They may offer two different versions of the rear coils. One a separate pair and then a complete coilover piece like some others on the market. All koni based pieces. I'm pretty excited as I've had their stuff on my ESP prepared Camaro, E30 bmw and a few others.
     
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  7. Bbarfoot14

    Bbarfoot14 Well-Known Member

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    On the wait list as well, great company
     
  8. Nick610s

    Nick610s Well-Known Member

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    Have an update today. After redesign of the camber plates, they should be figuring out their complete kit sometime within the next two weeks. They are not a huge suspension company but they make quality kits. Which all their springs are eibach linear rate springs with the kit built to customer specs. (Street/track/middle ground setup) I am lucky enough to live an hour away from them so I have already made arrangements for the first set to be put on my car. I'm pretty excited. I will be doing a review etc. just FYI I have a base GT which I will be looking for a good all around street/autox setup. Coming from basically a stock suspension I'm guessing I will see drastic improvement. I'm already on 285/35r19 squared wheel setup. Which was a great improvement as well.
     
  9. Nick610s

    Nick610s Well-Known Member

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    So I dropped my car off at Ground Control yesterday for them to use my car for initial product install and test fitting. I have done business with them before so i know what to expect. And that's nothing short of awesomeness as they are a great suspension company to work with.

    They showed me the parts going on the car as well as how they all work. And I must say, from what I've seen, their camber/caster plate design is better than anything I have seen thus far. Camber/caster both adjustable without removing the strut from the vehicle. Which isn't available from other camber plates on the market yet from what I've seen. If I am wrong than correct me.

    The rear stuff is pretty standard, they have plenty of experience with the separate shock spring suspension as they are deeply rooted in BMW tuning. They are going to test both ways to decide what they believe works better while they have my car.

    Last but not least, the kits will be koni S/A based and you can chose your spring rates when ordering. Or they can reccomend rates depending on your application. Can't wait to get my car back next week!
     
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  10. GCSystems

    GCSystems Well-Known Member

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    :headbang::headbang::headbang: I'll be happy to post some pictures and answer any questions as well, but I'll wait for your review fist.

    We're also putting together a video that includes some of the install as well as some footage of the suspension during the initial test drive. I'd be happy to post it on here if there's interest in seeing it.

    Thanks again Nick! I do have to say I miss the car already.:thumbsup:
     
  11. Nick610s

    Nick610s Well-Known Member

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    So I got my car back Wednesday and I must say its a night and day difference! The rest of my suspension is stock just for reference and the kit makes the car feel so much more connected to the road. Anyhow I will post a full review with more pics since I haven't gotten to hit any twisties yet to really test it out. Around town it is still smooth and comfortable enough to DD. and I can go soft on the shocks for added comfort. But for the sake of going to drive hard soon, I'm leaving them on the stiff setting. image.jpg
     
  12. tyshenry

    tyshenry Well-Known Member

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    What spring rates are you running? And can you take some good pics of the camber/caster plates?
     
  13. Nick610s

    Nick610s Well-Known Member

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    Right now I'm 450 front 850 rear. You can see the camber plates on the pic below.

    Disclaimer: this is the kit that is on my car. They painted it per the color of my car since I was the first and my car is comp orange. The final product will be powdercoated/anodized and can be done per customer choice, so really you can have whatever color you want under there. But the standard stuff will be red/black/gold.

    Oh and I am in no way associated with ground control aside from having them install the kit on my car. I do not work for them. image.jpg
     
  14. GTP

    GTP Deutsche Pony

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    What is the max/min ride height you can set them to?
    Are linear springs available?
     
  15. tyshenry

    tyshenry Well-Known Member

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    Rears are progressive? And 850 seems awfully low. Barely more than stock. Seems like running 450 front with that low of a spring rate in the rear will throw off balance.
     
  16. Nick610s

    Nick610s Well-Known Member

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    All the springs they use are linear springs. The ones in the picture were for display purposes and fitting only. The springs on my car are 450lb front and 850lb rear, but they can do almost any rate requested.

    I can go all the way back to stock height and I have another inch in the rear and 1.5 front that I can spin them down. That would put the suspension geometry way out of whack though.
     
  17. GTP

    GTP Deutsche Pony

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    Man, stock height to -1", linear spring rate choice, and camber plates! Where do I sign?
    Remind us the price on these again?
     
  18. Nick610s

    Nick610s Well-Known Member

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    No the rear are linear. Springs in the pic are display. that's 300lb higher front and 200lb higher in the rear, I was base car not PP. If you look at the other rates provided by other manufacturers for just lowering springs, even steeda linear springs, the rate is pretty good. And your shocks have a lot more to do with being able to handle those rates. I wanted a decent DD ride as well as being able to autox/track once in a while. I will be going to drive some twisties soon. But I do believe the car is going to be balanced.
     
  19. Nick610s

    Nick610s Well-Known Member

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    Final pricing isn't complete yet from what they've told me, but most of ground controls pro-kits are in the 1800-2000 range.

    Here's their site so you can see what they offer. They have been around for 20+ years. They do a lot of Porsche,bmw,Honda etc. as well as full on custom stuff.

    http://www.ground-control-store.com/products/index.php
     
  20. tyshenry

    tyshenry Well-Known Member

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    You should be thinking of the rate increase as a percentage though, not an absolute number.

    The base GT spring rates are 160/668. So, you went up 181% in the front and only 27% in the rear. And comparing to GT PP rates (stock 165/728), you went up 173% front and 17% rear. Now, I don't think you necessarily want to match percentages either, but it shouldn't be too disjointed either.
     
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