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1998 Toyota Supra - Dark Dominion

A Single-Turbo Supra That Turns 1,000 Flywheel Hp-On A Stock Bottom End

Karl Funke
Mar 2, 2007
Photographer: Henry DeKuyper

Toyota Supra enthusiasts are a greedy bunch. It's a fact of nature, like Newton's gravitational constant, water's boiling point or the fact that Adam Sandler's next movie will be even more retarded than his last. But Supra owners aren't greedy for money, it's power they hunger for.

Who's the greediest Supraphile yet? We nominate Houston, Texas, resident Peter Blach. This guy won't be satisfied until he breaks the 1,000-hp mark on the chassis dyno using the completely stock bottom end of his 2JZ-GTE.

He sold his last Supra TT, a '98, with hopes of finding something else to build, some other type of platform to use. After months of looking, and not finding anything he liked better, greed took over and Blach began looking for another Supra. A few weeks later, his friend Raj Magon of Autodynamics, also in Houston, came through with this black-and-tan '98 six speed.

A week after purchasing the car, Blach and his friend Tommy Bahn started replacing everything that wasn't perfect; floor mats,carpet, dash, ashtray, shift knob, and seats included. Pieces used in this phase of the project were all direct factory replacements.

0401_sccp_02_z+1998_toyota_supra+rear_left_view Photo 2/11   |   1998 Toyota Supra - Dark Dominion

On the exterior, Blach had the hood and front bumper repainted to take care of the few rock chips. The bottom body molding was also color matched to the rest of the car, and Blach added a Wings West front lip. Out back, an RMM spoiler with a carbon-fiber center blade, was perched at the terminus of the steeply raked rear hatch. The interior received a 10,000 rpm TRD tach, and GReddy gauges for boost, exhaust temp and fuel pressure.

Next came suspension and rolling stock upgrades. Blach pulled the stock springs and shocks and replaced them front and rear with Eibach Race Springs and KYB AGX shocks, a setup that worked well for him on two of his previous Supras. He also added Cusco front and rear strut tower braces to bolster the chassis.

The brakes weren't modified other than the installation of TRD braided stainless-steel lines.

For wheels, as with the springs and shocks, Blach decided on a system that served him well on his last two cars, custom Fikse FM/5s in a decidedly wide format both front and rear. The fronts measure 18x9.5 inches and wear 265/35R-18 BFG g-Force T/A KDs, while the rears are an incredible 18x11 inches with 295/35R-18 BFG rubber. Blach says they're similar to other FM/5s he's owned, but in this case, are so wide they actually feature a recessed hub area.

0401_sccp_06_z+1998_toyota_supra+front_left_view Photo 6/11   |   1998 Toyota Supra - Dark Dominion

As we noted earlier, Blach's main goal in building the car was to create the most powerful engine possible using a stock 2JZ block. To this end he left the bottom untouched but has made significant changes to the engine's breathing capabilities and its fuel system. His first task was sending the cylinder head to Tony Urrutia of SHP Cylinder Heads in Houston, where it was ported and polished, received HKS 272 cams, 1mm oversized Ferrea valves and Crower titanium springs and retainers.

The next step was deciding on a forced-induction system. Again, Blach relied on past experience and decided to use an RPS single turbo kit. This time the kit was built to his specifications and includes an RPS header with 1.75-inch equal-length Jet Hot-coated runners, 4-inch RPS downpipe and midpipe, an HKS 60mm GT-Series wastegate, and a 3-inch intake pipe and K&N filter. RPS kits normally run GT-series turbochargers, but Blach's car currently uses a new-generation SP74 turbo, sourced from Larry Prebis at Sound Performance in Chicago, which sacrifices a bit of bottom-end spool for more high-end flow.

Other additions on the engine's intake side include an Accufab 3-inch throttle body and a new intake manifold from Sound Performance. An HKS titanium exhaust pipe lets waste gases out the rear.

To ensure the fuel supply would be rich enough for the hard-breathing engine, Blach ordered a Stage 2 fuel enrichment kit from Jarrett Humphries of Powerhouse Racing in Haslet, Texas. The package includes a new fuel rail with a 17.4mm inner diameter, Rochester 960cc injectors, two in-tank Walbro pumps, an Aeroquip fuel pressure regulator and an NX wet nitrous kit. For fuel tuning, Blach uses AEM's EMS stand-alone computer running a five-bar MAP sensor. Since he had no experience working with the EMS, Blach called on Justin Nenni of Protech in Austin to perform the tuning.

0401_sccp_07_z+1998_toyota_supra+engine_bay Photo 7/11   |   1998 Toyota Supra - Dark Dominion

Using the standard RPS turbo kit, its supplied GT-series turbocharger and the tuned AEM computer, Nenni and Blach say they were able to throw down 912 hp at the rear wheels in its first couple of dyno pulls. The next day, Blach and Bahn performed some basic maintenance on the car, like changing a leaking main seal. While they were at it, they also installed the bigger Q-trim SP74 turbo from Sound Performance.

On its next dyno session, Blach's Supra turned the Dynojet rollers to the tune of 958 rear-wheel horses at 31 psi on a 50-shot of nitrous. During the day's test session, the car turned out eight 955-plus dyno runs. Considering the power lost through the drivetrain, the engine itself now easily produces 1,000-plus hp at the flywheel, and it does so reliably.

Currently, Blach is trying to solve a boost spike issue he's encountered during some of his dyno testing sessions, one that causes an inexplicable 4 to 5 psi drop and hasn't allowed him to test the car's full potential.

He discovered the problem through the AEM computer's datalogging capabilities, and hasn't yet found a solution.

"I've tried everything from changing the wastegate spring to changing boost controllers," he says. "I've not been able to test the car at full tilt, and have stayed away from really high boost, but in the next few months I hope to fix the problem and break my own record again." This time we may be talking more than 1,000 at the wheels. Greedy bastard.

Engine
Engine Code 2JZ-GTE
Type Inline six, cast-iron block,
  aluminum head, turbocharged
  and intercooled
Internal Modifications None
External Modifications RPS intake pipe, K&N filter,
  RPS exhaust manifold, Sound
Performance intake manifold,
Accufab throttle body, 4-inch
downpipe, 4-inch midpipe,
SP74 turbo, HKS GT
  wastegate, HKS blow-off
valve, HKS titanium exhaust,
HKS 272 cams, Ferrea valves,
Crower titanium springs and
retainers, Unorthodox Racing
cam gears, GReddy oil catch
can, GReddy front-mount
  intercooler, NX wet kit
Engine Management Mods AEM EMS, Powerhouse fuel
rail, Rochester 960cc
  injectors, Aeroquip fuel
  pressure regulator, dual
  Walbro in-tank fuel pumps
Drivetrain
Layout Longitudinal front engine,
  rear-wheel drive
Drivetrain Modifications Lightened flywheel,
  RPS twin-disc carbon clutch
Suspension
Front Eibach springs, KYB
  AGX shocks, Cusco strut
  tower brace
Rear Eibach springs, KYB AGX
shocks, Cusco strut
  tower brace
Brakes
Front TRD braided
  stainless-steel lines
Rear TRD braided
  stainless-steel lines
External
Wheels Fikse FM/5 18x9.5 (front),
Fikse FM/5 18x11 (rear)
Tires 265/35R-18 BFGoodrich
  g-Force T/A KD (front),
295/35R-18 BFGoodrich
  g-Force T/A KD (rear)
0401_sccp_01_z+1998_toyota_supra+burnout Photo 11/11   |   1998 Toyota Supra - Dark Dominion
By Karl Funke
177 Articles

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