Team America World Time Attack - ARK Design's BNR32 Skyline GT-R Part 4

Supposed to be by Eric Hsu, Really by Mike Kojima

In the last segment, Gary Castillo of Design Craft Fabrication was starting to work on the rest of the car's fabrication.  With the clock ticking away and a lofty early June completion date looming closer, it was decided to let the gutting of the rear section of the car wait until next year.  In my opinion this year will just be a development year for us to get some experience with the car and the World Time Attack format.

This year we learn, next year look out!  This year we will be going in with an undeveloped aero package and a conservative engine package.  We have little experience with aero dependent cars and no notes developed for the track.  We learn quick though!

Read About Part 1 Here!

Read About Part 2 Here!

Read About Part 3 Here!

Gary made a high MDF board plug for our splitter going off of some guidelines I gave him.  The real splitter will be made of carbon with a foam core. Since we could not afford Andrew Brilliant, the team has to settle for Mike Sorta Smart.  The splitter is going to be 6" from the leading edge of our bumper as I think there will not be much downforce benefit by making it longer.  I think longer will only make the car more pitch sensitive in general.  The center kick up is to reduce pitch sensitivity.  As the car dives or moves around on the suspension the kick up will help keep air flow going to the rear diffuser.  Their are two 20 degree small front diffusers leading to the front wheel wells which will have vortex generating strakes in them to help keep the flow attached.  The wheel well diffusers will be removable so we can tune them depending on how much test time we have.  We have air traps in front of the front tires and end plates for the splitter in front of the  tire to give more stagnation pressure.  Side canards which you can't see yet will create some Newtonian downforce and create side vortices to reduce air curling under the car from the sides I hope.  Without CFD or a windtunnel and no real time to do physical testing the whole deal is a crap shoot.
Gary and I rough out the packaging for the rear diffuser.  We decided to go with a diffuser vs tunnels because a diffuser is easier to package and make in the short time we have.  I also think the production based rear suspension has too much crap to hang in the airflow of tunnels.  We are going to make the diffuser as wide as possible to get the maximum area and it is going to be around 10 degrees with strakes to keep the air flow attached.
Gary with an angle finder and I are trying to find the best possible area to take up.  The top of the diffuser is going to use a diffused exhaust exit which Eric will hot blow on over run as part of our aero and anti lag engine control strategy.  Hopefully this innovation will work well and we won't cook off the fuel cell!
Gary's impossibly long check list.  Eric and I are on the Formula D circuit so everything must be in place before we fly out for the east coast early next week.  Gary moved to a new shop in record time since our last installment.  He is up and running but everything is a mess and the shop is in disarray.
 All hands are on deck in a full court press to get the car done.  The guys at Bridges Racing are all helping out as their car is on the east coast on the way to Florida.  Bridges Racing supports Robbie Nishida and Achilles Tires.  A lot of the guys from Cosworth are pounding away too,  It look like an Asian NASCAR team in there!


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Thursday, May 24, 2012 11:58 PM
Another update on the Team America R32 already?! HELL YEA...these updates are like crack cocaine
Friday, May 25, 2012 12:23 AM
Bloody hell a update already? im liking this haha
Friday, May 25, 2012 2:18 AM
So it'll be Tarzan piloting this thing then?
Friday, May 25, 2012 2:28 AM
Thanks Mike for listening to me....LOL

Question: why building a dash? It sounds a stupid question but why not just have a flat carbon panel with switches and gauges and call it a day?
Something like this:
Dan DeRosia
Dan DeRosialink
Friday, May 25, 2012 4:41 AM
Can't speak for their reasons... in my view, not having any sort of horizontal plane there has all sorts of annoying reflections off the inside of the windshield for one. Not a big deal, but annoying. Another thing is that a plain flat panel is a lot more flexible than something in two or more planes... it's hard to read gauges if they're vibrating around. I wouldn't imagine having a 'dash' like they have laid out is going to be that much more work.

Mike, all this talk of the aerodynamics stuff is making me excited to see Mk2 (or whatever you're going to call it internally) of the build, with slightly less time constraints. I assume you've been looking at prototype stuff for inspiration? What you're doing on the front end sounds sort of like the late Nissan GTP cars. Pretty darn cool even as it sits though.
Friday, May 25, 2012 5:50 AM
I don't know that you mentioned in earlier installments that you would be running E85. I think it's a great choice. I'm a DSM fan and E85 was a godsend when it became mainstream here in the US.
Keep the updates coming. As you can see by the responses, we love them. This is an amazing project. It's even more amazing when you think of the timetable you're working with.
Friday, May 25, 2012 6:46 AM
Glad to see the C&R radiator still fits. Angled up, are you going to vent out of the hood? Again, one of those ideas we had originally planned for the XS R32.

You can probably get away with an even smaller radiator since the block will be aluminum this time around. We originally sized that radiator for an iron block RB26, and I recall the coolant temps looked really good when the car was run.
Friday, May 25, 2012 7:32 AM
It's good to finally see someone change from regular E85 to E85R, is Sunoco supplying the race gas... I can't believe you only need such a tiny fuel cell
Friday, May 25, 2012 12:38 PM
Awesome to get more updates on this TA build! I have my fingers crossed you all have enough time for some drive testing before you have to pack it up.

Insane amounts of time/effort/knowledge into this build.
Friday, May 25, 2012 3:38 PM
I love every time I see this build that team America song plays in my head lol.
Friday, May 25, 2012 9:15 PM
hi guys,
great build! i saw this reservoir in the corner of the boot, care to share what is it for? i suppose its something unique to the ATTESA system?
Mike Kojima
Mike Kojimalink
Friday, May 25, 2012 9:41 PM
It won't be there for long, we are using a different center diff control.
Eric Hsu
Eric Hsulink
Saturday, May 26, 2012 1:27 AM
"Asian NASCAR team" LOL...it was crazy. There was 2 grinders, a plasma, a band saw, a cold saw, a TIG welder and two belt sanders all going at the same time all manned by Asians. This is what it is going to take to get this car done on time.

Tonight Gary, Hung, Brian, David, Pete and I got a lot of shit done too. But unfortunately there was no Mike and Stephen around to take pics. Tomorrow Tim from Apex Speed will be coming down to work on the electronics harnesses, Gary will be fabricating the transmission mount for the Holinger, Pete will continue welding, and I will continue plumbing the brakes and working with Tim. Kenji from Greddy will be bringing some intercoolers down too for fitment. The Bridges racing crew (Brian, Hung, David, and Steve) are working the Just Drift event at Willow Springs so they won't be down tomorrow unfortunately. The Lithium batteries from Braille just arrived today and those things are awesome at only 8 lbs each.

This is exciting shit! Who lives in LA, knows their shit, and is down to help?!? You don't have to be Asian of course...
Eric Hsu
Eric Hsulink
Saturday, May 26, 2012 1:34 AM
Just got an email from Nakajima at Voltex (its 2:33AM here in Los Angeles), the wing and canards are shipping on Tuesday! There are so many parts arriving now that the shipping guys at Cosworth at probably pissed at me.
Eric Hsu
Eric Hsulink
Saturday, May 26, 2012 1:43 AM
Alex: there's no time to read gauges in Time Attack. A digital dash with a big fucking red alarm is all you need to tell the driver to slow it down. Otherwise, the driver is driving like a fucking lunatic to try and get a perfect lap. Ever drive a 900hp car around a track?

Greg: Yes, a smaller radiator is coming. Not only does a smaller radiator improve packaging, it reduces the weight by carrying less water.

Henry: In the US, we'll be running Propel brand E85. I have been in contact with Propel corporate and we have been using it for engine testing at Cosworth. It is extremely consistent (+/- .25% E85 contect) and does not change seasonally. In Australia, Ian CEO of WTAC arranges a wheat brew E85 that also works well. Or at least it worked well in Sierra Sierra's EVO. A Time Attack car only needs to go one lap hot. Anything more than a single hot lap for an unlimited Time Attack car is an exercise in futility.
Der Bruce
Der Brucelink
Saturday, May 26, 2012 5:43 AM
Poor Kyong! I've had to strip an interior before and that angle grinder was one of the worst tools I used. I switched to a large wire wheel before settling on one of those Rand Right angle die grinders like you were using to debur those door hinges in the last part, with a couple different attachments on the end. That worked the FASTEST and smoothest. Are you going to paint match the floor or use a Lizard skin for better thermal insulation?

I also laughed at the Asian NASCAR team comment....but I think growing up on the Pacific Rim, I wouldn't have thought anything of it unless Mike had commented on it.

Eric: If I was living in my ideal Orange County, I'd have probably been helping out a long time ago! Hope you got my PM...I can barely get them to work well.
Saturday, May 26, 2012 1:20 PM
Eric, that's exactly my point. While a data-logger is mandatory. The driver doesn't really have to look at anything but the course; hence the suggestion about why bother making a full-size dash.
While it's pretty and it complement the interior but I don't see why bother making one.
Anyway, just my .02

Here is the progress of the Cyber EVO (take a look at that front splitter !!!)
Mike Kojima
Mike Kojimalink
Saturday, May 26, 2012 2:33 PM
Wow I think that is going to be an odd combination of downforce/vs drag vs aero balance but we will see.
Saturday, May 26, 2012 3:30 PM
Sucks that I'm not in socal....I wouldn't miss this if I could be involved.
Saturday, May 26, 2012 6:21 PM
Surprising no 15-19 year olds are "Sweeping the floor"...
Tuesday, May 29, 2012 7:31 PM
I'm 20. Can I sweep the floor? I will ACTUALLY come and stay out of your way if at all allowed. I don't know nearly enough to sound in the least way knowledgeable around you folk, but I can certainly try my best to learn from you. This is obviously a long shot (maybe the longest in history), but I'd really like to learn from the likes of intelligent builders.
Eric Hsu
Eric Hsulink
Thursday, May 31, 2012 5:18 PM
You want to learn from intelligent race car builders that plan and schedule their build. You probably don't want to learn from intelligent builders who are building a race car in their spare time, but rushed into completing the car in what seems like a ridiculously short time frame. We are relying heavily on our experience and are taking short cuts wherever possible. You'd learn too many bad habits I think.
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