Toyota Supra MKIV : Kevin's Homepage

Toyota Supra mkiv

Kevin's Mkiv

I own a Red 1994, 6 speed TT MKIV Supra imported from Japan which I bought in New Zealand during February 1998. I first 'discovered' the Supra through a Wheels magazine article (now on this site) about the 12 fastest cars in Australia. The Supra won me over at that moment with its great looks, superb handling and awesome passing acceleration. From 100 to 130 km/h it was a full half second quicker then the next fastest car in that top 12.

I am the Webmaster for this Supra website.

My Compound-Sequential turbo article

My TH400 conversion article

My QSV article

Race Results: Getrag 6 speed

Powercruise 55, Offstreet Drags - 1st

Powerfest Taupo 2010, Offstreet Drags - 1st

Powercruise 21, 6 Cylinder Dyno - 1st

Powercruise 21, Offstreet Drags - 1st

NSDW (Night Speed Drag Wars) 2010-2011 summer series - 2nd place C2 (2WD turbo) class
NSDW (Night Speed Drag Wars) 2007-2008 series - 2nd place C2 (2WD turbo) class
4&Rotary NZ Import Drag Racing Championship Series 2007 - 1st place C2 (2WD turbo) class
NSDW (Night Speed Drag Wars) 2006\2007 series - 1st place C2 (2WD turbo) class
NSDW (Night Speed Drag Wars) 2005-2006 series - 2nd place C2 (2WD turbo) class
NSDW (Night Speed Drag Wars) 2004-2005 series - 1st place C2 (2WD turbo) class
NSDW (Night Speed Drag Wars) 2003-2004 series - 1st place C2 (2WD turbo) class
NSDW (Night Speed Drag Wars) 2001-2002 series - 3rd place C2 (2WD turbo) class

Best Performance: Getrag 6 speed

Taupo racetrack - 45.38 secs on 6th December 1998 (old track)
Pukekohe racetrack - 1m 9.83 secs on 16th May 1999
Meremere dragstrip - Best 60ft time is 1.554 sec on 23rd March February 2007
Meremere dragstrip - Best 1/8 mile ET is 7.042 @ 102.71 mph (165.30 km/h) on 31st January 2010
Meremere dragstrip - Best 1/8 mile MPH is 106.68 mph (171.69 km/h) on 8th April 2011
Meremere dragstrip - Best 1/4 mile ET 10.949 @ 129.79 mph (208.88 km/h) on 7th November 2008 (60ft = 1.697 sec)
Meremere dragstrip - Best 1/4 mile MPH is 129.85 mph (208.98 km/h) on 29th April 2007

Race Results: TH400

Powercruise 39, Off Street Drags - 3rd

Best Performance: TH400

Meremere dragstrip - Best 1/8 mile ET is 6.826 @ 105.99 mph (170.6 km/h) on 6th January 2013
Meremere dragstrip - Best 1/8 mile MPH is 107.54 mph (173.07 km/h) on 20th November 2013
Meremere dragstrip - Best 60ft time is 1.742 sec on 6th January 2013

Magazine Articles:

NZPC Magazine #159 - Veteran Warrior

NZPC May 2008 - Accidentially Quick

NZPC Magazine #159 - Power Play

Brute Force

Dave at Torque Performance on the North Shore dyno'd my car on their Dyno Torque dyno on 16th April 2013 and I got 568rwkw (762whp) at 27 psi boost on E85 fuel.

Engine Bay Modifications:

Precision 6870 turbo, AR 0.96
SPA cast exhaust manifold
Turbosmart 45mm external wastegate
Crower 272 inlet and exhaust cams (10.5 exhaust, 10.3 inlet), exhaust 4 deg adv, intake 3 deg adv
Brian Crower (93-98) MKIV Supra Valve Springs and Retainers - 2JZGTE - Single Spring
Race head porting and port matching to manifolds
Brian Crower 1mm oversize valves
Brian Crower rods with ARP 625 rod bolts
CP 86.5mm forged pistons with factory crank
600mm x 300mm x 120mm non-brand name intercooler
Twin Link 3 channel ignitors
Kenne Bell Boost-A-Spark set at 30% gain
Twin 14" electric fans with 60mm thick custom aluminium radiator
Turbosmart 50mm raceport BOV
Custom intake manifold with 80mm throttle body
Huge K & N Pod filter
Custom cold air box

Fuel and ECU Modifications:

Link Thunder ECU tuned by Dave at Torque Performance
XSpurt 2200cc injectors
Zeitronix ethanol content analyzer and display
GM Ethanol sensor (old style)
Titan Motorsports fuel rail
Weldon A2040-120 fuel pressure regulator
Twin factory feed lines from the fuel hanger, single factory return line
Removed the factory fuel pressure pulsation damper
Twin Walbro E85 400L fuel pumps installed in tank pumping E85 fuel. Second pump turns on at 15psi boost
Kenne Bell Boost-A-Pump currently set at 0% gain until larger turbo installed.
Adjustable launch control and anti-lag buttons in driver side of cabin

Other Modifications:

ACT XTreme +50% pressure plate with vacuum hydraulic clutch (to reduce pedal pressure)
Running a 4.0" downpipe and midpipe to 3.5" mandrel exhaust system with two large AdrenalinR mufflers making it reasonably quiet
TRD LSD with 3.538 big 220mm diff (from UK spec TT auto)
Half size battery
Custom strengthened 3.0" driveshaft
Volks racing wheels (17" x 9.5" rear, 17" x 8" front)
Kuhmo Ecsta Supra 712 tyres (285/40-17 rear, 255/40-17 front)
Mid 1995 on factory BIG Supra brakes (awesome)
Whiteline "handling pack" with 30mm front (+50%) and 20mm rear (+30%) swaybars with polyurethane front bushes
Factory Bilstein shocks revalved at the front +50%, Tein HA shocks set to hardest setting at the rear
TRD engine bay strut brace
Fire extinguisher bolted to front of drivers seat

Previous Modifications (now obsolete):

Compound turbo setup
TH400 trans and coolers
Apexi (AP Engineering) PowerFC ECU with 8500rpm limit running up to 26 psi on 98 octane fuel with Nulon Octane Boost
TRD clutch plate with factory flywheel
Factory Bilstein shocks revalved - front +50%, rear +30%
Garrett GT35R then Greddy T78 then Turbonetics T72 then Turbonetics T76
Greddy 180 km/h Speed Limit Remover
Greddy BBC (Boost Cut Controller) set to 4.35 volts
Upgraded US turbos to Garrett GT3540 with exhaust AR=0.83 and then to Greddy T78 turbo (AR=1.03)
54mm external wastegate (adapted from the Jap exhaust bypass valve)
Upgraded stock turbos to USA turbos
Upgraded factory intercooler to a FMIC made up of 3 factory intercoolers welded end to end (600x275x125)
Upgraded Jap spec inlet cam to USA inlet cam
Upgraded factory fan to a single 14" electric fan
Upgraded to a 3.5" exhaust starting from 2 into 1 turbo manifold
Upgraded to a 3.5" in/out Borla oval muffler
Upgraded factory 16" wheels to Factory 17" wheels
Black 52mm boost gauge (psi) in clock location
Tweeked boost using a manual bleeder for up to 20 psi boost.
Fuelmate Fuel Controller (now uninstalled)