Mazda RX7 GSL Rally + Homologation Version

rx7b.jpg

In 1984, without much financial backing from Mazda itself, Mazda Rally Team Europe (MRTE) took the jump from Group 2 into Group B with the RX7. The car features wider flares, a large rear spoiler with an oil cooler underneath, upgraded components, and a high revving rotary engine producing around 300 HP. While they had to manufacture most of their own parts in-house, MRTE still managed an impressive third place finish at the 1985 Acropolis Rally.

***article expansion needed, please use the link at the bottom of the page to contribute!***

MRTE subsequently started work on a Group S RX7 prototype, for details CLICK HERE!

SPECIFICATIONS

Group/Class B/12 Homologation number: B-255 (click # to view papers)
Years active 1984~1986 Homologation

  • start: February 1st 1984
  • end: December 31st 1988
Engine
Type 13B RESI, 2 rotors Wankel, gas 2 nodes / 3 lobes
Displacement 1308 x 2.0 = 2615cc
Compression ratio N/A
Output power – torque 300 HP @ 8500 rpm 270 lb-ft @ 7500rpm
Materials block: N/A cylinder head: N/A
Aspiration naturally aspirated MRTE Weber 51 IDA carburetor
Ignition & Injection
  • Bosch L-Jetronic fuel injection
  • 3x high-flow fuel pumps
Cooling system water-cooled
Lubrication system dry sump with trunk mounted reservoir and rear wing mounted cooler
Transmission
Type rear wheel drive MRTE/PBS 5-speed manual transmission with “dogleg” first gear
Gearbox ratios
  • N/A
  • N/A
  • N/A
Diffrential ratios
  • N/A
limited slip rear differential
Clutch dry / twin plate
Chassis-body
Type
  • steel monocoque FB332 chassis with roll-cage
  • 3 door coupe widened fiberglass bodyshell
  • lexan windows
Front suspension Bilstein shock absorbers, improved parallel links
Rear suspension Bilstein shock absorbers, improved parallel links
Steering system rack and pinion N/A
Brakes
  • four-wheel disc brakes
  • MRTE 4 pot front brake calipers
  • Alloy 2 pot rear brake calipers
  • Hydraulic handbrake
dual circuit with servo
Dimensions
length: 4285 mm (169.0 in) width: N/A height: N/A
wheelbase: 2420 mm (95.0 in) front track: N/A rear track: N/A
Rims – tires
  • Enkei 15×6″ alloy wheels
  • Enkei 15×7″ alloy wheels
  • Front: DMG2 195/65R15 gravel tires
  • Rear: DMG2 205/65R15 gravel tires
Dry/Unladen Weight 960 kg (2120 lb)  Bias: F50/R50
Weight/power 3.2 Kg / HP (7.1 HP / lb)
Fuel tank N/A

HOMOLOGATION / PRODUCTION VERSION

rx7s

MAZDA RX7 GSL SE (series 3)

Widely known as the quirky sports car with a rotary engine and rear wheel drive, the Maxda RX7 was a mainstream production model contrary to most of the other Group B special homologation cars. It is hardly a rare machine with over 470,000 produced in its entire first generation. What the FISA (FIA) mandated per the rules in those instances was that 20 “Evolution” models were built (basic rally cars without the liveries) to homologate the car for competition. However, these cars were almost exclusively used in competition by the rally teams themselves and never sold to the public. As such, the following specs will be of the top of the line model that was sold to the public. You can get a sneak peak of one of those 20 “Evolution” models in the gallery section further below.

SPECIFICATIONS

Class Sports RWD coupe
Production 1978~1985 Assembly: Japan
Engine
Type 13B RE-EGI, 2 rotors Wankel, gas
Displacement 1308 x 2.0 = 2615cc
Compression ratio N/A
Output power – torque 135 HP @ – rpm 135 lb-ft (183 Nm) @ – rpm
Materials block: N/A cylinder head: N/A
Aspiration naturally aspirated
Ignition & Injection fuel injection
Cooling system water-cooled
Lubrication system external oil cooler
Transmission
Type rear wheel drive 5-speed manual transmission
Gearbox ratios N/A N/A N/A
Diffrential ratios N/A Limited Slip
Clutch N/A
Chassis-body
Type steel monocoque FB chassis 3 door coupe bodyshell
Front suspension N/A
Rear suspension Live Axle, four link, Watt linkage
Steering system rack and pinion N/A
Brakes 4 wheel disc brakes N/A
Dimensions
length: 4285 mm (169.0″) width: 1675 mm (66.0″) height: 1260 mm (50.0″)
wheelbase: 2420 mm (95.0″) front track: N/A rear track: N/A
Rims – tires N/A N/A
Curb Weight 1050 kg (2315 lb)  bias: 50/50
Weight/power 7.8 Kg / HP (17.1 HP / lb)
Fuel tank N/A

GALLERY & VIDEOS

rx7bv Mazda_RX-7_Gr.B_002 MazdaRX7GroupB rx7ba3

rx7b1

rx7ba4 rx7ba rx7ba2


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

  • Images & videos are the property of their original owners
  • All homologation papers are the property of the Fédération Internationale de l’Automobile (FIA): SOURCE

Do you want to contribute information or pictures to this page? Please feel free to do so by using this CONTACT form!

(C) WELCOME TO THE ENCYCLOPEDIA OF THE GOLDEN ERA OF RALLYING