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[BUILD] My Ultimate C7 Track Car - The C7 GS.R

 
Old 01-28-2019, 03:00 PM
  #41  
BrunoTheMellow
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Originally Posted by Tool Hoarder View Post

Depends... I haven't touched springs, but I can confirm the front bar bolts are TTY stretch bolts. No clue why GM would use stretch bolts for these applications.
They aren't going anywhere . Those bolts don't get much force on them. The spring is compressing itself into the k member.
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Old 01-28-2019, 03:06 PM
  #42  
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Looks good, I'll be keeping an eye on this thread!
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Old 01-28-2019, 03:22 PM
  #43  
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Originally Posted by BrunoTheMellow View Post
They aren't going anywhere . Those bolts don't get much force on them. The spring is compressing itself into the k member.
I understand that all... the annoyance is breaking a TTY bolt when re-using it on accident when you don't expect it to be TTY and then having to bust out the extraction tools and making a simple project a lot more fun.
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Old 01-28-2019, 06:52 PM
  #44  
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This thread is going to be a bad influence on me but glad to see your back, and in a GS.
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Old 01-28-2019, 07:23 PM
  #45  
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Sean I didn't see it mentioned but the parking brakes may be something you'd want to remove.
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Old 01-28-2019, 08:03 PM
  #46  
Poor-sha
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Originally Posted by badhabit_wb View Post
Sean I didn't see it mentioned but the parking brakes may be something you'd want to remove.
Yeah, I thought about that. Ideally I'd get a rear rotor hat that isn't provisioned for parking brake either.
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Old 01-28-2019, 08:06 PM
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Originally Posted by Poor-sha View Post
Yeah, I thought about that. Ideally I'd get a rear rotor hat that isn't provisioned for parking brake either.
Bet Jeff could fix you up with that.
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Old 01-28-2019, 09:35 PM
  #48  
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Originally Posted by Poor-sha View Post
Yeah, I thought about that. Ideally I'd get a rear rotor hat that isn't provisioned for parking brake either.
You can run stock rotors with all the parking brake stuff removed. Drivinhard had made custom hats for C5s to remove the brake drum provision and it does save weight.

Last edited by Tool Hoarder; 01-28-2019 at 09:35 PM.
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Old 01-28-2019, 11:06 PM
  #49  
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Subscribed. Looking forward to following this.
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Old 02-02-2019, 08:40 PM
  #50  
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I'm waiting on my control arms to arrive to start putting the car back together but today I was able to put the front ARP studs on. All and all it wasn't a bad job once I figured out how to hold the spindle in the vice so I could remove the bolts holding the hub on. The first time I tried bracing the spindle against my chest while I loosed the bolts but that didn't work very well.

I wish I'd realized I was going to remove the rear hubs sooner and I would've removed that axle nut while I had a control arm to hold it in place. I'm going to remove the rear parking brake assemblies and put the rear studs in once I have the control arms on.



Whoever they have packing things at Katech is *very* thorough. Both studs and nuts were wrapped neatly in foam, then with bubble wrap.



Last edited by Poor-sha; 02-02-2019 at 08:40 PM.
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Old 02-03-2019, 08:35 AM
  #51  
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Awesome to see the new build Sean. I had my control arms off to Mark just before we ran up at VIR in November and the difference was amazing. I am interested to see how light you can get the new project, hope to see you out there soon.

I noticed above the lugs, any reason for not running the titanium lugs? I believe Katech is where I got mine.

Last edited by C6psi; 02-03-2019 at 08:57 AM. Reason: added info
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Old 02-03-2019, 08:47 AM
  #52  
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Originally Posted by C6psi View Post
I noticed above the lugs, any reason for not running the titanium lugs? I believe Katech is where I got mine.
Honestly, I just prefer the standard 19mm 6-point pattern over the 17mm 12-point pattern on the Ti nuts. If they had them in the normal pattern I'd have bought them.
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Old 02-03-2019, 09:04 AM
  #53  
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Originally Posted by Poor-sha View Post
Honestly, I just prefer the standard 19mm 6-point pattern over the 17mm 12-point pattern on the Ti nuts. If they had them in the normal pattern I'd have bought them.
Fair enough, I have fallen down the rabbit hole far enough that it takes at least $100 per pound to shed any additional weight off my car! LOL, looking forward to seeing where you end up with the GS.R
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Old 02-03-2019, 09:48 AM
  #54  
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WHat are you having done to the control arms?
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Old 02-03-2019, 11:29 AM
  #55  
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Originally Posted by Newton06 View Post
WHat are you having done to the control arms?
AMT Motorsport spherical bearings
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Old 02-03-2019, 11:33 AM
  #56  
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I should've included this in my earlier update but both FE7 springs are in as well as the sway bar bushings. However, I'm waiting on new bolts to finish the front sway since I accidentally ordered rear instead of front bolts and apparently the parts plan in Lansing is shut down due to the cold. On the spring install I was really surprised at home much the rubber mounts on the front spring compressed. After I got everything in place and starting tightening the bolts I thought maybe the spring brackets were supposed to be bigger for the FE7 springs. However, the part numbers are the same and it worked just fine.
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Old 02-03-2019, 12:15 PM
  #57  
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Originally Posted by Poor-sha View Post
AMT Motorsport spherical bearings
What is the expected benefit?
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Old 02-03-2019, 12:39 PM
  #58  
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Originally Posted by Newton06 View Post
What is the expected benefit?
AMT does a pretty good job of explaining it on their site here.
https://amtmotorsport.com/collection...oreproductinfo

The short version is that the rubber bushings are there to absorb vibration and harshness of small impacts. Unfortunately they cause stiction in the suspension and flex under heavy load causing changes in camber/caster/toe that you don't want. Bearings remove all that slop.
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Old 02-03-2019, 12:53 PM
  #59  
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For my car, it was the best mod I've ever done (AMT Monoballs). Tightened up the whole feel of the car and let the coilovers do their job immediately. Car is far more crisp and direct. Steering more responsive and car responds to inputs virtually immediately. All of the mush and gush is gone. Alignment stays where I put it. I did back to back comparisons on my car (rubber ----> AMT spherical) and the difference was dramatic. Very good mod for a guy like Sean.
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Old 02-03-2019, 02:49 PM
  #60  
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Originally Posted by Poor-sha View Post
AMT does a pretty good job of explaining it on their site here.
https://amtmotorsport.com/collection...oreproductinfo

The short version is that the rubber bushings are there to absorb vibration and harshness of small impacts. Unfortunately they cause stiction in the suspension and flex under heavy load causing changes in camber/caster/toe that you don't want. Bearings remove all that slop.
And what all that means from a driving standpoint is the car is much more direct and immediate to your inputs. It goes where you point it immediately rather than waiting for all the rubber to squish at various rates. It makes driving the car at the limit much easier and much more predictable. To me it's the number one thing you can do to get that go-kart like handling .

Here's a video showing the whole process for those who are interested:

And Sean barring catastrophe you'll have your arms back by this Friday so you can slap that baby back together and go for a drive!
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