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07
 Nobuhiro Tajima Suzuki Pikes Peak winning racecar
 It was really hard to see without looking like a spy, but here is the Holinger gear box.  We were surprised to see it.  Note the high pressure lines and what looks to be a forward facing driveshaft.  It was hard to get a view, stick the camera in there when no one was looking and fire off a few frames.

The All Wheel Drive system is one of the most secret and hard to figure out by looking at parts of the car. Much of it is hidden, shrouded by covers surrounding the center of the car.  Like the Millen PM580, the Monster uses an ingenious combination of parts to get a functioning AWD system.  An Exedy triple plate clutch and light flywheel feed the power to a Hollinger dog engagement constant mesh 6-speed transmission with sequential shifting.  A Holinger is an Australian racing transmission favored by the V8 Supercar and high powered tuner car market.  It is a common transmission for GTR guys to use.

 Nobuhiro Tajima Suzuki Pikes Peak winning racecar
 Another view of the transmission.  Like the RMR PM580, instead of using sophisticated  and super expensive bespoke transaxle, the Monster appears to use an ingenious combination of some off the shelf parts to make up the AWD drivetrain.

The power is transferred to the mysterious center differential. We think that this is a planetary gear arrangement with torque split control coming form a set of wet electro hydraulic clutches. From the center diff, power flows via a short drive shaft and torque tube from the center diff to the rear diff.

 Nobuhiro Tajima Suzuki Pikes Peak winning racecar
 Look at this!  The rear diff has an integral hydraulic pump built into the diff housing.  You can see it on the top.  It appears to take its power from the ring gear.  The rear diff is wide and large, could the center diff be contained in here as well?  The diff looks like two quick change rear ends with a bunch of space in between them.  Lots of room for goodies in there.  A heat exchanger lives in back but looks not to get much airflow.  The tank above the GoPro camera is for the drysump system.

The rear diff has an elaborate bespoke machined case with what looks like large integral hydraulic pump built into the casing.  The size and beef of the pump and the fittings and lines coming out of it seem to indicate that this is not just a cooling pump but perhaps something that provides hydraulic control pressure to the clutches of an electronically controlled center diff.  The pump looks like it takes its drive from the pinion gear.  If so the car must be moving for its active center diff control to work.

 Nobuhiro Tajima Suzuki Pikes Peak winning racecar
 Dry carbon goodness.  The rear deck is perforated with many air intakes for heat exchangers and engine intake.

Although the Monster is supposed to be based on the Suzuki SX4 Crossover Sport Utility, it looks so unlike anything, we are not sure which Suzuki it’s supposed to resemble!  The Monster looks more like an illicit coupling of a Daytona Prototype and a WRC car than any sort of SUV!  I think it would be safe to say that the only bits of the original Suzuki might be a few engine castings, maybe.

 Nobuhiro Tajima Suzuki Pikes Peak winning racecar
 There is a Suzuki in there, where it is and what model, we are not sure.  The press has called the car a Vitara, an XL-7 and an SX4.  To us the Monster looks like none of these.  The car's looks are probably why the rest of the media world seems to have no idea what car the Monster is based on either.  We just know that it's a Suzuki and it's badass!

The Monster's chassis is a tubular space frame which is pretty unremarkable except that it uses a lot of triangulation and we think several main bulkheads, probably important for chassis stiffness on a car with a lot of aero load that could fall thousands of feet off a cliff.  The engine is mid mounted and does not use the engine or transmission as a load bearing member.  The chassis reminds me of a beefed up Daytona Prototype.

 Nobuhiro Tajima Suzuki Pikes Peak winning racecar
 You can see a lot of the Monster's tubular space frame here.  Buttresses divert stress around the engine and serve as a mounting point for the rear suspension.  The frame also supports the rear wing.

 Nobuhiro Tajima Suzuki Pikes Peak winning racecar

Nobuhiro Tajima Suzuki Pikes Peak winning racecar
Big front duct takes in air for the forward slanting heat exchanger for the coolant.  The duct exits on top of the hood where it contributes to downforce.

 

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Comments

bigdave
# bigdave
Wednesday, July 07, 2010 7:52 PM
Impressive is the angle of the halfshafts in the rear to allow the car to jump without too much downward angle.
bigdave
# bigdave
Wednesday, July 07, 2010 7:53 PM
Front too!
Element
# Element
Wednesday, July 07, 2010 9:44 PM
This site is just fantastic. You guys cover the best events and you go into real actual depth!

LOVE IT. Keep up the good work.
nul
# nul
Thursday, July 08, 2010 6:40 AM
The turbos look like WRC units, minus the inlet restrictor that they are machined for. My thoughts as to why the rear wheels are in the tunnels? it has to fit inside a shipping container to get here and it may not be able to get any wider. If that is the case, then I would have put fairings around the tires to reduce the turbulence.
brainrush
# brainrush
Thursday, July 08, 2010 9:24 AM
I don't like how pikes peak is slowly turning into an all tarmac event, it makes it less exciting to watch than the huge plumes of dirt and lurid 4 wheel drifts that make for stunning photographs and a real challenge for the drivers.
spdracerut
# spdracerut
Thursday, July 08, 2010 12:05 PM
Those are TR30Rs. Magnesium compressor housings. As for the wastegates, maybe custom pieces. The old Cosworth Champ car engines, and the Audi R8s have non-aftermarket looking wastegates also. Might have just been built in-house or some Motorsports only company.
kebin
# kebin
Thursday, July 08, 2010 12:38 PM
Dang, I counted at least 5 GoPro cameras on that thing! I wanna see some of that video! It's interesting about the transponder failing...I had not heard about that controversy.
Aldayo
# Aldayo
Thursday, July 08, 2010 12:44 PM
i'd been lookin everywhere for detailed pics of this car... thanks a lot mike!! u're the man!!!
Dusty Duster
# Dusty Duster
Thursday, July 08, 2010 1:37 PM
That thing looks more like an LMP car than a Suzuki SUV!
mx5
# mx5
Thursday, July 08, 2010 10:09 PM
Another awesome article! Thanks!
Eric Hsu
# Eric Hsu
Friday, July 09, 2010 1:04 AM
I dig the level of preparation with the engine, turbo, and charge cooling. The "skyscraper" has A LOT to catch up to if they want to beat this thing. I can think of like 10 things off the top of my head right now...
pcruz
# pcruz
Friday, July 09, 2010 10:25 AM
is that an oxigen tank i see? is it 4 the pilot?
Mari Umekubo
# Mari Umekubo
Friday, July 09, 2010 11:09 AM
Yes, it's used in the higher altitudes.
Thoroughly interesting Mike! THX!
OMG Its Weasel
# OMG Its Weasel
Friday, July 09, 2010 6:42 PM
requesting time off from work as soon as i can for the 2011 event. its about time someone comes correct to battle for record holder.
JDMized
# JDMized
Saturday, July 10, 2010 3:03 AM
Eric (Hsu), care to share some of your thoughts in regard?
Eric Hsu
# Eric Hsu
Sunday, July 11, 2010 10:57 AM
Mike and I (and Jeff) shared some of our thoughts over lunch last week. They are long and detailed and could be easily misunderstood over the internet. The next time we meet at a time attack, ask me and I'll explain them to you then. The Skyscraper is a cool car, but it needs development time (and some different parts in my opinion).

I am sure Rhys will come back next year and go much quicker. Will he smoke the Monster or Rod's record? Well let's look at the cars in a brief comparison.

The Monster has a highly developed engine, turbo, ecu, chassis, aero, and suspension package. The engine has magnesium compressor housing TR30s turbos ($4k+ each). The inlet plenum is magnesium and appears to be designed for various length runners (to be determined by engine developer). I generates 910hp @ 8750. It probably uses a motorsport grade ECU that controls both engine, transmission, and possibly diffs. It uses motorsport grade turbochargers mounted low in the chassis for a low CG and lightweight tube and fin intercoolers with plenty of dry carbon ducting for airflow. It uses hydraulic differentials with multiple maps so Tajima can adjust things to his liking on the fly. All of this indicates to me that the engine is professionally prepared, the car is well engineered and extremely well though out. The proof is in the pudding since he is a record holder.

Rod Millen's Tacoma was purpose built from clean sheet so I'm guessing that the chassis and suspension is optimized. It might be a bit old school by today's standards, but it purpose built nonetheless. It is not a converted road race car's suspension. The engine is a highly developed ex-IMSA GTP Toyota 503E engine probably with a motorsport grade ecu, harnesses, sensors, etc. In the IMSA days in qualifying the engine made over 1100hp in qualifying and I think it was raced at 900+hp RESTRICTED. At Pike's Peak they don't need to run a restrictor so your guess is as good as mine's how much power the Tacoma was cranking out. The engine was dominant in IMSA and was highly developed by TRD back in the late 80's and early 90's.

The Skyscraper makes 700hp tops (turbo sizing limited I think), but with more development time on the Hyundai engine they may be able to make more next year. I doubt the Hyundai revs to 8750+rpm. 700 is well short of Rod or Tajima. The big heavy tube and fin intercooler is high mounted. The ECU isn't capable of controlling the transmission. It has mechanical diffs on a race track with varying surfaces (remember that PP is currently both paved and dirt so how could the same diffs work optimally for both?). There are more points, but like I said, ask Mike or I in person next time. I think they'll need plenty of time to figure things out and become a serious contender. Rhys is a hardcore competitor and hates defeat so it will be very exciting to see the changes to the car for next year. I wouldn't be surprised if the car was revamped entirely.
Eric Hsu
# Eric Hsu
Sunday, July 11, 2010 11:03 AM
BTW, here's a good shot of the Tacoma's engine, turbo, etc.

JDMized
# JDMized
Monday, July 12, 2010 2:08 PM
Eric, thanks for taking the time to explain your thoughts (I'm not an engineer as you are), and my mechanical understanding is definitely much less than yours....but I get the whole pictures, and what you're trying to say.
I'm sure, like you said, that Rhys Millen will work the bugs out for the next year event, but so will Tajima....lol, it should be interesting.
I'll catch you at the next Time Attack event.
Thanks,
Alex
Tech@EPR
# Tech@EPR
Saturday, July 17, 2010 2:04 AM
Garrett TR30R. These turbochargers are specifically designed with 6 customizable options from the factory. They are based on the GT28R platform yet make a heap more power compared to their larger framed cousins. The info I have on my desk shows that they flow enough to make 600HP PER unit. A far cry above what anything remotely in its class can produce. Last I was quoted for a set of these turbos with the options I was looking for was $16.5K for TWO turbos. They have an ultra light alloy mix of titanium and combination of alloys in the turbine housings making the entire unit weight a mere 12lbs!!! (that's right the entire turbocharger weighing only 12lbs!!!...that means compressor housing, CHRA, turbine housing) They have a vband inlet and discharge on the turbine housings as well.

Garrett at this point in time aren't making them due to the release of the GTX series turbos where they have spent much of their time in developing. However you can still order these but don't expect to get them ANYTIME soon. From what I was told its a minimum of a 2-3 year wait. So now the question is...who can make a comparable unit and readily available.
Mike Kojima
# Mike Kojima
Saturday, July 17, 2010 10:34 AM
I thought they were unobtainable by non works people? They are so rare I could only recognize the Motorsport non containment housings.
Eric Hsu
# Eric Hsu
Sunday, July 18, 2010 9:02 AM
I think it depends on which TR30R you are looking for. I am guessing that not all of them are that super exotic. We regularly sell two different TR30Rs (WRC Sierra and WRC Focus) and they aren't $8,250 each even after our mark up despite the turbos being a part of an ultra expensive Cosworth engine. I'm sure they could be though depending on the configuration. Also, they are regularly in stock for us albeit in very low quantities. It could be because we are considered works Ford however.
Tech@EPR
# Tech@EPR
Sunday, July 18, 2010 10:54 PM
Eric, is there a way I can contact you to obtain two of these turbochargers? I've been contacting Garrett and all distributors for these and everyone comes up dry. You are the first to say you physically have them in stock. Let me know how to get ahold of you.

Eric Hsu
# Eric Hsu
Sunday, July 18, 2010 11:14 PM
I just sent you a message. Check your inbox on motoiq.

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