Team America World Time Attack - ARK Design's BNR32 Skyline GT-R Part 6

By Mike Kojima and Eric Hsu

So much has happened on the car that it was a bit much to go over it all on one sitting so here is part 2 exactly one day later. We will take the story up where we left off before. Read More about Team America Here!

A few editions ago, Gary and David had started work on the rear bulkhead. Now things are getting closer and the bulkhead is formed. Gary did not have to beadroll it as the top flange makes the thing pretty darned stiff. It took some tricky work with a shrinker to make the curved flange. The intent is to have this stuff done in carbon later but it probably won't get done in time. This aluminum is taking the place of a lot of heavy steel

The aluminum paneled trunk coming closer to completion.  The rules say the fuel cell has to be walled off from the rest of the car.  In the future we are probably going to cut all of the unibody away here and have a tubular structure to support the back of the car like a pro drift car.  This will probably save at least 50-70 lbs but we simply don't have time right now to do this.   A closer view of the sturdy fuel cell mounting.   We wanted to move the fuel cell as far forward as possible to reduce the polar moment of inertia as well as to give the cell some more protection.  Gary had to pocket the firewall to keep things legal.   The fuel cell support structure.  Next year this will all be tube framed out.  We will attach the support structure for our rear diffuser to this. Also the exhaust will be run in this area. Wait and see what Gary has planned for the diffuser.

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Monday, June 18, 2012 12:17 AM
Very nice progress... Keep it coming! :)
Monday, June 18, 2012 2:43 AM
Holy crap, insane work, I can't wait to see the whole aero package complete.

This is such an awesome TA build... although I really want more updates, I understand if they start to get thin. At this point, I just hope you all have enough time to do what you need to do before packing the car up.
Monday, June 18, 2012 4:10 AM
Glad to see a proper rear wing mount. The one we made previously was made from super heavy steel angle iron and some aluminum sheet that stuck up through the decklid. Good job Gary. That'll save a few pounds!

And I thought the original wing we had on the car was big... damn, that's a huge one now!
Monday, June 18, 2012 9:19 AM
So the rear mounted master cylinders on the pedal assembly replace the factory Nissan brake MC? Do you need to order them specific to what kind of brake system you're running (as far as size/stroke/etc.)?
Monday, June 18, 2012 11:40 AM
The two CNC machined brackets for the Voltex wing flex. Have you thought about making a single piece? Or a sturdier one?
Eric Hsu
Eric Hsulink
Monday, June 18, 2012 11:58 AM
JSWORKS: Typically masters are sized by manufacturer recommendation, driver feel, and/or data.

Alex: You'll see how Gary figured it out in a future installment, but that was addressed. You can stand on the wing, kick the wing, whatever the hell you want to it and it does not move.
Monday, June 18, 2012 4:33 PM
Any preparations to avoid deep frying the electronics?... Engine diaper under the tank perhaps?
Monday, June 18, 2012 4:52 PM
Chances are if the car is destroyed enough to bust the oil tank, the electronics won't be worth much anyway. A shield to protect the driver from hot oil in that situation is good sense though.
Tuesday, June 19, 2012 2:10 AM
Eric, I knew you guys looked into it. Those thin CNC stands have always been the weak point of Voltex.

On a side note, regarding Pectel and the other electronics in the passenger side; how about build a small aluminum box (with all the electronics in it) and have an electric fan pumping fresh air to it?
Tuesday, June 19, 2012 9:19 AM
What is the sensor with the gray pigtail teed off the brake master cylinder on page 4?

Telemetry sensor? Simple rear brake light sensor?

Good luck getting it all together, it's definitely an ambitious project.
Nismo Sentra S-Tune(99)
Nismo Sentra S-Tune(99)link
Tuesday, June 19, 2012 9:47 AM
ok, i am really happy that the skyline is coming along, but as i am a hyundai tech, i have to ask, how did you get an elantra coupe.....it's in the last pic on page 2 in the background. you guys doing some work for hyundai, or is it just parked there by accident?
Eric Hsu
Eric Hsulink
Tuesday, June 19, 2012 8:39 PM
HybridAndy: its a brake line pressure sensor. There's one sensor for the front and another for the rear. It triggers brake lights, certain strategies, and allows fine tuning of the brake bias.

Nismo: it is just parked there by accident. Actually you'll probably be seeing that car in a certain TV show soon. That's how Design Craft makes their money. It isn't from building "low" budget race cars!
Tuesday, June 19, 2012 10:17 PM
Really enjoying the progress guys. I'm wearing my same EFR T-shirt today that Eric was rocking in the photos.
Wednesday, June 20, 2012 9:59 PM
Awesome build. I hope Nemo Racing makes it, that would make for awesome competition.
Saturday, June 23, 2012 11:47 PM
Design Craft got a mention on Autoblog, in reference to that Elantra Coupe

look forward to seeing it when it's done!

Friday, June 29, 2012 12:39 AM
MOAR PLEASE. it's been far too long... i need to knooowwww!!!
Tuesday, August 28, 2012 12:15 AM
I hope you guys are aware that the fuel cell mounting will not pass NASA rules/scrutineering.

Straight from the NASA rule book:
"The cell should be in a container made of at least 0.036-inch steel, 0.059-inch
aluminum, or 0.125-inch Marlex, fully surrounding the bladder."
Mike Kojima
Mike Kojimalink
Tuesday, August 28, 2012 12:18 AM
The fuel cell is fully scca/nasa compliant.
Tuesday, August 28, 2012 12:36 AM
I know the the cell is, however the mounting is not according to the photos.
Mike Kojima
Mike Kojimalink
Tuesday, August 28, 2012 12:41 AM
The outer shell of the fuel cell that contains the bladder is the equivalent of Marlex, you are not looking at the bare bladder.
Eric Hsu
Eric Hsulink
Tuesday, August 28, 2012 6:52 AM
Who's running this car in NASA? lol
Tuesday, August 28, 2012 10:16 AM
@Mike - The bladder you're using looks like a saver cell from ATL which is a molded seamless "rubber" bladder, so that is the bare bladder.

@Eric - I thought you would have known but GTA/SLB use NASA rule book when it comes to fuel cell/cage.

I'm just letting you guys know so you guys can fix now, because it would suck to not see this thing run in November due to tech.
Eric Hsu
Eric Hsulink
Tuesday, August 28, 2012 1:39 PM
Damn, that sucks. This car was built to FIA rules which the Saver Cell complies to. I haven't been involved with US Time Attack for a while now. You are right though, it would suck if we couldn't run, but oh well. If there's time, we'll make a cover. If not, then we aren't going to run.
Mike Kojima
Mike Kojimalink
Tuesday, August 28, 2012 2:26 PM
Thanks for the info Tonester!
Wednesday, December 05, 2012 6:35 AM
Can you tell what fenders are used front and back?
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