Toyota Celica TCT TA64 + Homologation Version

Published on: Jan 21, 2016 @ 15:01
Originally Published in: 2014 (old website)
(C) Jay Auger - website owner & author
Notice: Any form of duplication methods (including but not limited to copy/paste of text and screen capture) of the website's content is strictly forbidden.
celica-twincam
TOYOTA CELICA TWIN CAM TURBO (TCT) TA 64

Similar to its Japanese cousin, the Nissan 240RS, this rear wheel drive rally car was conceived and built with the traditional way of building rally cars that existed before the arrival of Group B. This “lack of vision” by the Toyota engineers obviously led to the Celica TCT not being competitive right from its debut in the WRC.

However, tradition does have its perks; using a standard production model offered ruggedness and reliability, both of which are key to winning endurance events, and both of which were somewhat lacking with the other Group B supercars. In those events the Celica did indeed excel; winning 3 Rallye Côte d’Ivoire and 3 Safari Rally events from 1983~1986, giving the car the nickname “The King of Africa”.

Albeit it could not compete directly against its superior four wheel drive competitors in special stage format, the Celica TCT is nonetheless arguably considered as one of the most successful rear wheel drive Group B cars. Only the purpose built mid-engine Lancia 037 can claim to have done better. The Celica was planned to be replaced by the Toyota MR2 (222D) as Toyota’s weapon of choice in the WRC but the project was cancelled alongside Group B/S’ demise

***This article is only a quick excerpt / please come back later for page expansion***

SPECIFICATIONS

Group/Class B/12 Homologation number: B-239 (click to see papers)
Years active 1983~1986 Homologation

  • start: August 1st 1983
  • end: December 31st 1988
Engine
Type 4T-GTE, I-4, DOHC 16v, gas located front longitudinal with 4o left inclination
Displacement 2090 cc WRC x 1.4 = 2926 cc
Compression ratio 7.1:1 ~ 8.0:1
Output power – torque 330~380 HP @ 7500~9000 rpm 250~320 lb-ft (343~430 Nm) @ 5500 rpm
Materials block: cast iron cylinder head: aluminium alloy
Aspiration
  • KKK K27 turbocharger
  • air/air intercooler
  • Nippon Denso D-jetronic multipoint EFI
boost: 8~13 psi (0.55 ~0.90 bar)
Ignition electronic,  Nippon Denso, 2 spark plugs per cylinder, firing order 1-3-4-2
Cooling system water-cooled
Lubrication system dry sump 15 lt
Transmission
Type rear wheel drive 5 speed hewland gearbox
Gearbox ratios constant: 1.364
1st: 2.818
2nd: 1.860
3rd: 1.423
4th: 1.169
5th: 1.000
R: 4.196
constant: 1.364
1st: 2.273
2nd: 1.719
3rd: 1.364
4th: 1.145
5th: 1.000
R: 4.196
Differential ratios 5.374, 4.889, 4.545 hypoid bevel gears limited slip rear differential
Clutch dry, double plate
Chassis-body
Type steel monocoque TA64 chassis with roll cage and front steel subframe. 2 door coupe steel bodyshell with plastic front and rear bonnets, plastic doors, plastic bumpers and plastic rear spoiler
Front suspension mc pherson strut with lower L wishbone, coil spring, telescopic gas shock absorber and anti-roll bar 15 to 30mm diameter
Rear suspension live axle with 2 lower radius arms, 2 upper 45olocation arms, parhar rod, coil springs, telescopic gas shock absorber and anti roll bar 10 to 20mm diameter
Steering system rack and pinion 2.25 turns lock to lock (13:1)
Brakes
  • F: ventilated rotors 260/285mm diameter with 4 aluminium piston calipers.
  • R: ventilated rotors 264/285mm diameter with 2/4 aluminium piston calipers.
  • 1986+: front ventilated rotors 300mm diameter
dual circuit with servo, adjustable ratio split front to rear
Dimensions
length: 4284 mm (168.7 in) width: 1785 mm (70.3 in) height: 1410 mm (55.5 in)
wheelbase: 2500 mm (98.4 in) front track: 1410 m (55.5 in) rear track: 1400 m (55.1 in)
Rims – tires
  • Speedline light alloy
  • front: 6″ – 8″ x 15″
  • back: 7″ – 10″ x 15″
  • Pirelli
  • 185~215/75 R15
Dry/Unladen Weight 1020~1100 kg (2250~2425 lb)
Weight/power 3.0 kg/HP (6.6 lb/HP)
Fuel tank 100 lt (130 lt for Safari)

HOMOLOGATION VERSION

TOYOTA CELICA GT-TS
TOYOTA CELICA GT-TS

The Celica was a mainstream production model which had many variants. However, Toyota decided to base its Group B homologation requirements on the top of the line GT-T model (TA63) and produced the GT-TS (TA64) in limited numbers. The use pf a separate and unique identifier was expressly done for the option to perform an “evolution” (ET) model for racing without having to stop production of the regular Celica (as the Group B regulations demanded in such a situation).

The GT-TS was not a turn-key rally car, unlike many of its Group B homologation supercar brethren, but it would serve as the official base for Toyota Team Europe (TTE) to modify them into the rally cars themselves. As such, only 220 cars were reportedly produced (200 road cars and 20 evolution models), making this special version of the Celica very coveted amongst the Japanese collector crowd.

SPECIFICATIONS

Class compact RWD Coupe
Production 1982 (220) Assembly: Japan
Engine
Type 4T-GTEU, I-4, DOHC 16v, gas located front longitudinal with 4o left inclination
Displacement 1791 cc
Compression ratio N/A
Output power – torque 180 HP @ – rpm N/A – lb-ft @ – rpm
Materials block: cast iron cylinder head: aluminium alloy
Aspiration
  • CT20 turbocharger
  • air/air intercooler
boost: N/A
Ignition electronic, Nippon Denso, 2 spark plugs per cylinder, firing order 1-3-4-2
Cooling system water-cooled
Lubrication system N/A N/A
Transmission
Type rear wheel drive 5 speed W55 gearbox
Gearbox ratios N/A N/A
Differential ratios 4.100 F-series limited slip rear differential
Clutch N/A
Chassis-body
Type steel monocoque TA64 chassis and front steel subframe. 2 door coupe steel bodyshell with plastic front and rear bonnets, plastic bumpers
Front suspension mc pherson strut with lower L wishbone, coil spring, and anti-roll bar
Rear suspension live axle with 2 lower radius arms, 2 upper 45location arms, parhar rod, coil springs, and anti roll bar
Steering system rack and pinion N/A
Brakes N/A N/A
Dimensions
length: 4435 mm (174.6 in) width: 1665 mm (65.6 in) height: 1310 mm (52.0 in)
wheelbase: 2500 mm (98.4 in) front track: N/A rear track: N/A
Rims – tires
  • N/A
  • N/A
Curb Weight 1060 kg  (2340 lb)
Weight/power 5.9 kg/HP (13 lb/HP)
Fuel tank N/A

PICTURES & VIDEOS

CelicaTA64_05 p1 p2 toyota celica twin cam toyota-celica-africa 1985-Toyota-Celica-TCT


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(C) Article by Jay Auger – website owner & author

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