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Top Secret's V-12 Twin Turbo Toyota Supra - V-12

Top Secret couldn't wait for Toyota so it made it's own Supra Concept

John C. Naderi
Mar 6, 2007
Photographer: Wesley Allison

I am not a very patient person. I can't make it through a naughty movie without tickling the FF button (among other things), and instant noodles aren't immediate enough without the aid of a microwave. But my intolerance is positively virtuous when compared to Kazuhiko Nagata. Smoky (as he is known for his mastery of the long, lurid burnout) refuses to wait for the world's leading automakers to produce a new model, choosing instead to take matters into his own very capable hands.

For the better part of the last decade Smoky has been churning out solid gold nuggets of tuning bling from within the confines of his Top Secret Performance Engineering Service shop. Exactly two years ago, Top Secret's CV35 Skyline debuted at the 2005 Tokyo Auto Salon. The car flexed a twin-turbo VK45 V-8 from a Nissan Cima. Smoky could no longer stand for the long-awaited release of the next generation Skyline GT-R and this was his own personal design study. At the time he was even thinking of grafting in a custom AWD system.

At the '07 TAS (we know we lag, our coverage will come next month) Smoky was at it again as he unveiled his latest concept-a gold Supra. Okay, I know what you're thinking: Top Secret's gold Supras are even more overexposed than Britney's hoo-hah. But this one was different. To begin with, the front end sports a unique set of headlights but, as with any of Smoky's creations, the secret ingredient lies beneath the golden hood. This Supra rocks a V-12, a twin-turbo V-12 no less, and it is Smoky's vision of what the next generation of this iconic Japanese supercar should be.

130_0704_04_z+top_secret_v12_toyota_supra+front_view Photo 2/19   |   Top Secret's V-12 Twin Turbo Toyota Supra - V-12

Once again Smoky was tired of waiting for Toyota to announce the plans for the new Supra so he did it himself. Ironically, Toyota unveiled its FT-HS concept around the same time as Top Secret's golden child halfway across the world at the North American International Auto Show in Detroit. Toyota's concept is a hint at what the automaker might offer as either a replacement for the Supra or a next-generation of the model. With a 400hp hybrid 3.5L V-6, it's safe to say that Toyota went in a slightly different direction than Top Secret's double boost V-12.

The only hybrid thing about the Top Secret Toyota is how Smoky successfully mated a V-12 to a Supra. Consider that this engine is the same length as the original 2JZ-GTE I-6 with an additional bank of six more cylinders set in a V formation. Now add two turbos with all of the necessary plumbing and you wonder how it all fits. But then, every Japanese person I meet wonders how my fat ass fits into a traditional JDM hotel room. Much like Smoky and this swap, somehow I just manage to squeeze it all in.

Even more impressive than the swap itself is where Smoky actually sourced his V-12 donor motor. The engine is normally found in the Toyota Century. The Century is a $90k home market luxury sedan and in factory guise the 5,000cc 1GZ-FE makes a mere 276hp. Smoky added a matched set of HKS GT2540 turbines along with one of his seductively shapely Top Secret custom intake plenums with twin 80mm throttle bodies. One concession to the reduced real estate within the engine bay is with the placement of the cooling system.

The ARC intercooler is angled into the front bumper to make room for the V-12 but this leaves no room for the ARC radiator-it's in the trunk along with a massive fuel cell (alas, Jonny's bike will never fit in there). Each quarter window gives up a fine piece of glass to make way for custom ducts leading to the radiator with twin puller fans sucking the remaining hot air out through a vent in the rear bumper. No doubt a custom bellhousing was required to mate the factory JZA80 Getrag six-speed gearbox to the massive 1GZ. An ORC clutch and Cusco 1.5 way LSD will help put down the projected power to the pavement once Smoky completes the build. That's right, this beast is under construction.

Oddly enough there is not a big tuning demand for Toyota V-12 luxo engines and Smoky will be forced to create custom one-off internals in order to achieve the 1,000hp rating he wants for this car. Why 1,000hp? Because this is the number Smoky feels is needed for him to take this car to 400 km/h (249 mph). Unlike every other story in Super Street, I am not making this up. Smoky wants to one-up his CV35 Skyline, which ran 341 km/h (212mph) on Germany's Autobahn. That top speed prompted the 400 km/h goal for the Supra and the necessity for the 1,000hp rating. But you need more than just power to rocket up to almost four times the speed that Ricky's Accord cruises on the 405, you need aerodynamics.

In addition to big tuning and big motors, Top Secret is known for its big, beautifully sculpted aero kits. Because Smoky loves speed-scorching highway runs even more than tire-smoking burnouts he places a high-priority on high-speed stability. Each Top Secret aero kit is designed to offer enough downforce to keep the vehicle planted at high-speeds but not overly so to restrict the car from reaching those speeds. This same compromise is applied to the aero work found on the world's leading sports car racers such as those in Japan's Super GT series. But Smoky prefers a clean street-styled look over the harsh, angular, tacked-on feel of a GT500 machine. The Top Secret Super G-Force Wangan widebody kit for the Supra supports this design philosophy.

130_0704_05_z+top_secret_v12_toyota_supra+engine_view Photo 12/19   |   Top Secret's V-12 Twin Turbo Toyota Supra - V-12

The 33mm front and 50mm rear over fenders blend artfully with the factory lines, but the Top Secret GT rear wing looks a little ricy. However, with 249mph speeds in store for this wing I'm sure it serves much more of a purpose than the bi-plane combat model atop the hatch of some Hot Import Rice tC. As part of the Super G-Force Wangan kit the headlights are the most polarizing part of the car. Some think them hot, others not, but no one can argue against the futuristic conceptual look these eyes give to the Supra, which is what Smoky was going for in the end.

The rest of the Supra is standard Top Secret fare with little more than leather-clad Bride Gias seats, Takata harnesses, a Top Secret wheel and a Defi Super Sports Cluster to complement the clean factory look that Smoky favors. The footwork is also pure Smoky-style with GREX stoppers and Top Secret coilovers equipped with the Roberuta Cup kit which offers in-car height adjustability. Finally, the Supra's shoes offer a new spin on things. The 19-inch Bridgestone Potenza RE050A tires may be some of Smoky's all-time fav' rubbers but the Volk GT-Fs are a new model finished in the Top Secret Exclusive gold.

With a $500,000 estimated value, Smoky is not sure whether he would sell this Supra or even build another if a customer makes such a request. But there's only one client who should think about purchasing this car and that's Toyota itself, if only to give it's designers the proper inspiration to take the next generation Supra in a direction it desperately needs to go.

Smoky's Greatest Hybrid Hits
Top Secret's Smoky Nagata's signature tuning maneuver is to drop unusual swaps into his cars and make them do big things. Here are a few of our favorite Top Secret creations:

Owner Top Secret

Hometown Chiba, Japan

Daily Grind Gold Miner

Power Est. 1,000-plus hp @ 5,500 rpm

Under The Hood 1GZ-FE 5,000cc engine; HKS GT2540 turbine (x2), HKS blow-off valve (x2), wastegate (x2); Top Secret custom intake plenum with twin 80mm throttle bodies; ARC intercooler, radiator (with custom rear mount)

Drive Train JZA80 Getrag transmission; Cusco 1.5 way LSD; ORC clutch

Brains Top Secret coilovers with Roberuta Cup kit

Rollers Volk Racing GT-F 19-inch; 245/35R19 front and 275/40R19 rear Bridgestone Potenza RE050A

Stoppers GReddy GREX eight-piston 380mm front, four-piston 350mm rear

Outside Top Secret Super G-Force Wangan widebody kit (includes front and rear bumpers, side steps, 33mm front and 50mm rear wide fenders, HID headlight housings with IPF lights); Top Secret carbon aero bonnet with bonnet pins, aero mirrors by Ganador with LED; GT rear wing, Top Secret Exclusive paint with Top Secret II paint and bodywork; MS-R graphics

Inside Bride Gias leather seats; Takata harnesses; Top Secret steering wheel, shift knob; Defi Super Sports cluster

Ice Carrozzeria Navigation


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