The Toyota Supra JZA70 was released in mid 1990 and was fitted with the first generation of the JZ engine series, the 1JZ-GTE. Rated at 206kw, this pushed the Supra (*TwinTurbo R) to a mid 14 second quarter mile time, 1 second quicker than the MA70 Turbo.
Other features of the JZA70 Supra was the replacement of the mechanical clutch LSD with a Torsen unit. The final ratio was also changed to 4.11 compared to the 3.73 of the MA70.
1JZ-GTE Engine Specifications
Induction Electronic Injection, Twin CT-12A Turbochargers (parallel), Intercooled
Valves 24
Camshafts 2 (DOHC)
Intake Duration ?
Intake Camshaft lift ?
Intake valve diameter 32mm
Intake Valve timing - Opening ?
Intake Valve timing - Closing ?
Exhaust Duration ?
Exhaust Camshaft lift ?
Exhaust valve diameter 30mm
Exhaust Valve timing - Opening ?
Exhaust Valve timing - Closing ?
Bore x Stroke (mm) 86 x 71.5
Capacity (cc) 2491
Compression Ratio 8.5:1
Maximum Power 206kw @ 6200rpm
Maximum Torque 365nm @ 4800rpm
Redline 7500rpm
Lubricant & Fluid Capacities
Oil system
Cooling system
Radiator cap pressure rating 10.7 to 14.9 psi
Thermostat rating 82 degrees Celsius Part Number 90916-03093
Gasket Part Number 16325-62010
Spark plug - Copper Tip NGK BKR6ES-8N
Spark plug - Platinum Tip NGK BKR6EP-8 Part Number 90919-01181
Nippon Denso PK16R8 Part Number 90919-01180
Hydraulic unit water pump Part Number 16090-49017
Hydraulic water pump pulley Part Number 16939-46010
Non-Hydraulic water pump Part Number 16100-49846
Non-Hydraulic water pump pulley Part Number 16371-46020
Timing Belt
Part Number 13568-46010 (08/90 - 05/92)*
Part Number 13568-49025 (05/92 - 12/92)
Part Number 13568-49065 (12/92 - 05/93)
Serpentine belt Part Number 90916-02306
*Replacement Part Number - 13568-49025
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5 Speed Manual Transmission Specifications (R154)
Gear ratios
Reverse 3.18
First 3.251
Second 1.955
Third 1.310
Fourth 1.000
Fifth 0.753
Lubricant Capacity - Gearbox
Oil specifications 80W-90 GL4 or 5 Gear Oil
Top Speed km/h @ rpm
First Gear 67 @ 7500
Second 111 @ 7500
Third 166 @ 7500
Fourth 218 @ 7500
Fifth 289 @ 7500
Final Drive Ratio 4.100
Differential Code G299
Drive Pinion - Number of teeth 10
Ring Gear - Number of teeth 41
Ring Gear size 200mm
Driveshaft Diameter 29.60mm
Lubricant Capacity - Differential
Oil specifications API GL5 Hypoid Non-LSD Gear oil
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Speedo Corrections
Speed km/h -True km
60-80
100-120
Top Speed km/h @ rpm
First Gear 64 @ 7200
Second 106 @ 7200
Third 158 @ 7200
Fourth 208 @ 7200
Fifth 276 @ 7200
Acceleration(อัตราเร่ง)
Standing start to... Time (Seconds)
60km
80km
100km
120km
400 metres 14.5 @ ?mph
Rolling start 3rd Gear 4th Gear 5th Gear
40-70km
60-90km
80-110km
100-130km
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Turbocharger Specifications
Manufacturer Toyota (Hitachi)
Type CT-12A (Part Number : 17201-46010 (Front), 17208-46010 (Rear)
Turbine size (Outlet diameter) 42mm
Turbine size (Inlet diameter) 51.6mm
Turbine Blade count 8
Turbine Material Ceramic
Turbine Housing Outlet (ID) 44.1mm
Turbine Housing Inlet (ID) 33mm
Turbine Shaft Diameter 8.5mm
Turbine housing A/R .45
Compressor size (Inlet diameter) 35mm
Compressor size (Outlet diameter) 54mm
Compressor Blade count 10
Compressor material Aluminium
Compressor Housing Inlet (ID) 37.9mm
Compressor Housing Outlet (ID) 30mm
Compressor housing A/R .30
Bearing ID 8.53mm
Bearing OD 13.55mm
Bearing Width 9mm
Bearing material Bronze
Bearing oiling holes (per bearing) 6
*Wastegate size (ID) 20mm
Actuator spring rate 10 psi
