This is it: my Bangkok-based bracket race drag race truck. Up until rercently, it was powered by a 600hp turbocharged Toyota 1.5JZ straight six cylinder engine. Best performance to date: 10.63 et at 137 mph . . . with 191 cu.in., and 0.9 bar of boost on gasoline with an auto trans @ 875 kilos. Not bad!
Click on the photo to the right to enter the photo gallery.
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1990 Mazda Familia Mini-Pick-Up "Pro Truck Bracket."
Owner: Dr. Jeff Harper, Pakkret, Nonthaburi.
Special Thanks for Sponsor Support: MacTec, Voodoo Racing Inc. (Pattaya, Thailand),Goodyear Racing Tires, Garage Complete, Adjan Siriboon, Glaserit Paint, Torco Oil (USA), Mark, and MV Automatics Australia.
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Weight: 800 kilos
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Engine:
Toyota 1UZ 4000cc (243 cu.in.) V-8, dual overhead camshafts, 4 valves per cylinder, aluminum head and aluminum block.
Engine Modifications:
* Standard 1UZ bottom end (9.25 cr)
* Kelford camshafts (intake: 264, exhaust: 264)
* Vortech V-9 Supercharger (0.9 bar bar - 12 pounds, max)
* Holley Pro Scoop
* Stepped header by Ramintra Turbo
* Merge Collector by Edelbrock
* Tial 50mm 55mm BOV
* Intercooler (Thailand)
* Suparu WRX "Pink" 565cc fuel injectors
* SARD fuel regulator
* Bosch fuel pump
* AEM Stand-alone ECU (and AEM CDI, when it becomes available again)
* 4 MSD GM Double Coils (wasted spark configuration)
* Accel HEMI Race 25 Ignition Wire
* TCK Spark Plugs (#7)
* Synthetic 10/30 Race Oil by Torco
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Transmission & Drive Line:
* Toyota 1JZ Supra A342 Automatic 3-speed + overdrive (not used)
* Level 2.5 Racing Valve Body by MV Automatics (Australia)
* High Stall Torque Converter (4200 rpm) by MV Automatics, Australia
* Modified accumulators by Harper Racing, Bangkok
* Programmable Transmission Control Unit: PCS
* Transmission Assembled by Harper Racing, Bangkok
* Supra Shifter
* Nissan 1-ton rear end: housing and axles narrowed by Adjan Siriboon
* Custom Spool - 4.10:1 gears
* Mitsu Evo V Driveshaft, Supra front U-joints and yoke,
*Nissan 1-Ton rear U-joints and Yoke
* 2 Jeg’s Transmission Coolers with Fan
* Torco Racing Trans Fluid
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Chassis - assembled and fabricated by Harper Racing with support from Adjan Siriboon (WorksPower, Bangkok):
* Custom "Harper Racing Turquoise" Paint by Glaserit, Bangkok
* Paint application and bodywork by Garage Complete, Bangkok
* Custom Bodywork by Mr. Lah, WorksPower
* Mazda Familia front frame half - standard Mazda Familia suspension, rebuilt with new parts and aluminum bushings
* RX7 front discs and calipers (aluminum)
* Full 12-point roll cage (as per NHRA rule book)
* 2" X 3" mild steel rear frame rails, narrowed ("back halved").
* Wilwood Dual Tandem Master Cylinder
* Wilwood forged aluminum 4-piston rear calipers
* Biondo Racing USA Line Lock (rear)
* Traction/Lift Bars by Harper Racing, Bangkok
* Summit Racing USA 5-gallon fuel cell, Earl's fittings
* Heavy duty replacement leaf springs, two leafs removed, aluminum bushings
* Rancho R-9000 9-way adjustable shocks, poly bushed
* Competition Engineering USA Wheelie Bars
* Moroso USA Drive Studs
* Centerline USA Convo Pro Wheels, 3.5 X 15 front; 10 X 15 rear
* Goodyear Racing 23 X 4 X 15 drag race tires, front
* Goodyear Racing or M/T 28 X 10.5 X 15 drag slicks, rear
* Parachute by Stroud USA
* Chute release by Stroud
* Poly glass
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Interior:
* Summit Racing USA Poly racing seat and cover
* Momo Steering Wheel
* Auto Meter USA: Memory/Recall Tach, Oil Pressure, Oil Temperature, Transmission Oil Temperature, Boost, and Water Temperature.
* AEM Wide-Band AFR gauge
* Moroso USA: Brake Pressure Gauge
* RCI Shoulder and Lap Belts
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This race car was built with bracket racing as the goal. The object of a "perfect" bracket race car is to be consistent and predictable in producing the desired e.t. for the intended bracket class, run after run. This car is built and tuned to run in several bracket classes at one race. It is not built to determine how fast the owner can make it run. Currently this car is set-up to be competitive in the 'handicap'12, and 11.90, 10.90, and 9.90 second brackets.
