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1500 Mile Road Trip to Velocity AP

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1500 Mile Road Trip to Velocity AP

  #16  
Old 09-14-2018, 04:43 PM
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So, after some delays just getting moved into our new building, and not wanting this car to be immobile when we needed to move, we're finally getting properly stuck into it. Chris (irish007) has been heading up the technical analysis and planning, great to have such an experienced hand on board steering that part of the ship.

Below, visualizing some possibilities for a wing mount, in this case looking at a rear mount through the plastic caps on the bumper cover. Talking to the OP we've settled on a trunk mount, and just doing some working through to decide what works best and is most cost effective. The GT4 style is a slam dunk but also means bonding mounts into the tailgate, cutting the tailgate and cutting & pinning the tailgate to prevent deformation & rocking around the hinge. One could simply order the tailgate assembly from AMR but once paint, Glass etc. is all done it's close to $10,000, versus fabricating something similar.

Also looking at doing an aluminum frame inside the trunk rather than supporting the load through the trunk. Nice to start with a blank slate.






Working on swapping out the CCM System ($25,000 for a full replacement) for the Brembo GT System - 380mm 2-piece fronts, with the 6 Pot Calipers. Some trimming to the dust shield is required.




We knew that the 380mm AMR Brembo system would fit under the 18" Prodrive wheels, but there was some questions remaining about THIS specific Brembo caliper which is a little different, as well as the upright & bracket from the V12V. It requires a spacer to be made since the V12V one doesn't space it correctly but not a huge issue. There is adequate clearance so we are a go on Brembo GT kit. This will be a good choice, as the pad & rotor replacement cost will now be IRO $2500 per change, compared to $25000 for the CCM. It does add a little weight but in the interest of cost & practicality, pad choice and ease of replacement it makes a lot more sense.



On the rears, we were toying with simply having a rotor made that would fit (355mm) and even checked if a standard 355mm V8 front rotor would fit but the rotor to hub offset is 4mm different. The simplest solution is to stick with the V8V rear sized 2-piece rotor and delete the parking brake. Since this car is never going back to being a standard road car, & only see occasional road use this makes a lot of sense.

Tires are on order, Hoosier R7 295/40/18, an easily accessible tire and about $1000/set less than a Pirelli slick.
 
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Canada V2A 4W6
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www.velocityap.com

  #17  
Old 09-14-2018, 08:45 PM
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Nice work Stuart. The spacer you mention is to space the caliper not the wheel - correct? I ask because using the CMM data and Brembo's drawing we modeled the two geometries in CAD and with a 380 rotor the caliper interfered with the wheel taper towards the rear of the wheel. I have not had time to print the template and physically check. If you had to space the wheel,that would corroborate our model. If you are spacing the caliper that is a completely different problem and I am back into the upgrade.

Are you changing the rear for performance? Will you change the proportioning valve? Will you remove the interior bits for the parking brake?

x-chr

Edit - it occurred to me spacing the wheel would only make the problem worse since the wheel is tapered from outside in. Did you have to clearance the caliper?
 

Last edited by era2076; 09-15-2018 at 12:55 AM. Reason: Clarification
  #18  
Old 09-15-2018, 09:14 AM
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Originally Posted by era2076 View Post
Nice work Stuart. The spacer you mention is to space the caliper not the wheel - correct? I ask because using the CMM data and Brembo's drawing we modeled the two geometries in CAD and with a 380 rotor the caliper interfered with the wheel taper towards the rear of the wheel. I have not had time to print the template and physically check. If you had to space the wheel,that would corroborate our model. If you are spacing the caliper that is a completely different problem and I am back into the upgrade.
First off, I'm not doing the work I'm just taking the pictures
We are talking about spacing the caliper. The V12V uses a different caliper bracket - it's a fairly simple flat bracket but the spacing required isn't quite the same. Chris was shimming out out with washers to figure out the optimum position and then we will probably have something lasered out of stainless in the correct thickness. It will also possibly require changing out the chunky socket cap head bolts for a lower profile head, but that's a pretty easy fix. Not sure, Chris may have determined that's not necessary since I had my head under the car.

Originally Posted by era2076 View Post
Are you changing the rear for performance? Will you change the proportioning valve? Will you remove the interior bits for the parking brake?
No, again like the fronts the whole brake swap is for cost, ease of access to spares reasons. You can pick all sorts of pad choices for the OEM V8V sizes, and end up with a ring + pad replacement cost of $2000-2500. Compared to $25,000. For sure it's theoretically a bit of a step backwards but this is not an open chequebook situation so we have to make smart decisions that further the goal - building a fun & unique track car that can be run reasonably cost effectively. Being 0.5 seconds per lap faster with CCMs if it means $25K brake services isn't worth it in a track day environment. Racing maybe.

I don't *believe* we'll need to change anything else. Relatively speaking the front/rear balance shouldn't be significantly changed from the OEM setup. We will be doing a shakedown run at Area 27 to make sure everything is working and the car is set up safely, before the OP comes to drive & collect it.

x-chr

Originally Posted by era2076 View Post
Edit - it occurred to me spacing the wheel would only make the problem worse since the wheel is tapered from outside in. Did you have to clearance the caliper?
Not the wheel just the caliper to the knuckle/hub assembly. So Cliff, what this means is, barring some last 1% that we're not able to see, we should be able to set you up with this same Brembo 380mm + 6Pot Front setup and the 2 piece rear rotors, and it should all clear the 18" Prodrive wheels we set you up with. And since you are working with OEM V8 Vantage bracket etc., I don't think any modification should be required, it should just be a bolt on fit.

Happy to set you up with some if you want to go that route.

 
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www.velocityap.com

  #19  
Old 09-15-2018, 07:36 PM
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Just excellent - is there any reason you chose the GT instead of the GT-S. Brembo claims the GT-S is a direct replacement for the GT caliper . Their marketing implies better heat control for track work.

x-chr
 
  #20  
Old 09-15-2018, 07:40 PM
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Also, is this the car that is getting the 4 point?

chr
 
  #21  
Old 09-17-2018, 05:39 PM
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Originally Posted by era2076 View Post
Just excellent - is there any reason you chose the GT instead of the GT-S.
We looked at the GT vs the GT-R but I didn't think the price difference was worth it, looks like the GT-S is a lot more reasonable though. I hadn't seen anything about the GT-S until you mentioned it. I wonder if it would be possible to simply swap the pistons when doing a caliper rebuild at some point? Looks like the pistons are the main difference from what I've read?

Also, is this the car that is getting the 4 point?
Yep, 4 point, seats, and harnesses for safety mods!
 
  #22  
Old 09-18-2018, 12:08 PM
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The marketing on the GT GT-S calipers I find to be rather confusing. They are both mono-block. The main difference I see is the the GT-S caliper body is hard anodized and the piston seal configuration seems to be different. They say they use racing style radiators on the pistons. What does that even mean? Do they provide additional cooling or not - LOL! The price difference between the two seem minimal so is it really just finish? The GT-R is over the top $ wise for me also - mine is still a street driven car.

Can't wait to see what they come up with for your 4 point .

chr
 
  #23  
Old 09-18-2018, 12:39 PM
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This is the best I've been able to find to differentiate the two. The marketing calls it the M6 M4. The Anodized body and machined logo lead one to assume this is the GT-S.



 
  #24  
Old 10-01-2018, 06:06 PM
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Harness Bar is finished prototyping, and we're making a jig to be able to replicate it. Designed to be installed with M10 Rivet Nuts, should give a relatively clean & easy install. The Rear bars also have a sleeve joint and bolt-hole, again for ease of installation. That could be welded if desired but this should make for a pretty clean install that can be done with (relatively) basic hand tools and without destroying the stock interior.

 
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Office: (1)236-422-3341
Mobile: (1)-250-460-1775
www.velocityap.com

  #25  
Old 10-01-2018, 09:19 PM
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chr
 
  #26  
Old 10-02-2018, 08:41 AM
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Will start a thread about this product shortly, once we have done a costing analysis and then we will start some production for those who are interested.
 
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Stuart Dickinson
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Velocity Automotive Performance Limited
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Canada V2A 4W6
Office: (1)236-422-3341
Mobile: (1)-250-460-1775
www.velocityap.com

  #27  
Old 10-03-2018, 04:49 PM
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Not sure how I missed this thread but I am subscribed and excited to see what you do! I have been planning a very similar GT4 Street build and once I seal the deal on a V8V it's going to happen..
 
  #28  
Old 10-10-2018, 05:41 PM
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So, we've got a solution figured out that is pretty unintrusive, easy to install without any crazy tools. You'd need basic hand tools to remove the interior stuff like the seat, and a Rivet Nut tool large enough to handle an M10 Rivet nut. Will post some more pics with the interior back in shortly but wanted to show you how this all looks with it out.

It is fully jigged & patterned so we will be taking orders. Probably be a month or so before we start production:
http://www.velocityap.com/ProductDet...-VANTAGE4POINT




 
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Stuart Dickinson
Managing Director
Velocity Automotive Performance Limited
2384 Government Street
Penticton, BC
Canada V2A 4W6
Office: (1)236-422-3341
Mobile: (1)-250-460-1775
www.velocityap.com

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