Mazda Savanna RX7 SA22C group 2 (1979)
 Source |
Development level Group B Group 2 |
Also called Mazda RX7 FB as series 2 model from 1981 and on
Specifications
| Group/Class | 2 and A/8 | Homologation number: 5713 and A5195 | |
| Years active | 1978-1983 | Homologation start: 1/8/1978 and 1/2/1984 Homologation end: 1/1/1982 and 31/12/1987 |
|
| Engine | |||
|---|---|---|---|
| Type | Mazda 12A RE, 2 rotors, 2 node 3 lobe type Wankel petrol engine | located front longitudinal | |
| Capacity | 1146 cc | WRC: x 2 = 2292 cc | |
| Trochoid (mm) | length of major axis 120, length of minor axis 90mm, width 70mm, trochoid radius 105mm, eccentricity 15mm | ||
| Compression ratio | 9.4:1, 11.0:1 | ||
| Output power - torgue | |||
| Main bearings | 3 of 43mm diameter | rotor eccentric bearing 74mm diameter | |
| Materials | side housing: cast iron | rotor housing: aluminium alloy | rotor material: cast iron |
| Ports | 4 lateral inlet ports, 23mm width, located in outer side housings | 2 peripheral exhaust ports, 41mm width, located in central side housing | |
| Aspiration | natural, 1 x NIKKI 210284-571 4 barrel down draft carburetor. 1980: 1 x NIKKI 210284-611 or 210284-601 or 210284-621 carburetor | ||
| Ignition | electronic with 2 spark plugs per rotor and 2 ignition coils. 12V battery | ||
| Cooling system | jacketed watercooled with pump, radiator, 410mm diameter-7 blades fan and thermostat | 9.5 lt | |
| Lubrication system | wet sump with 1 oil cooler. 1981, group 2: dry sump | 5.2 lt | |
| Transmission | |||
| Type | rear wheel drive | 5 speed manual gearbox, or JATCO 3 speed automatic gearbox | |
| Gearbox ratios | constant: 1.706/1 (29/17) 1st: 3.674/1 (28/13) 2nd: 2.218/1 (26/20) 3rd: 1.433/1 (21/25) 4th: 1.000/1 (-) 5th: 0.825/1 (15/31) R: 3.540/1 (27/13) |
constant: 1.091/1 (24/22) 1st: 2.350/1 (28/13) 2nd: 1.697/1 (28/18) 1981: 2nd: 1.608/1 (28/19) 3rd: 1.289/1 (26/22) 3rd: 1.240/1 (25/22), 1981+ 4th: 1.000/1 (-) 5th: 0.881/1 (21/26) R: 2.266/1 (27/13) |
automatic, 1st: 2.45/1 2nd: 1.45/1 3rd: 1.00/1 R: 2.18/1 |
| Diffrential ratio | from 3.63/1 (40/11), 3.72/1 (41/11), 3.90/1 (43/11), 4.10/1 (41/10), 4.37/1 (35/8), 4.44/1 (40/9), 4.62/1 (37/8), 4.87/1 (39/8). 1981+: 5.12/1 (41/8) | hypoid bevel gears limited slip rear differential | |
| Clutch | dry, single disk 270mm diameter | ||
| Chassis-body | |||
| Type | Steel monocoque Toyo Koyo SA22C chassis with roll-cage. 2 door coupe steel bodyshell with steel bumbers. 1979+: front and rear plastic spoilers | ||
| Front suspension | macpherson struts with lower arms, coil springs, telescopic gas shock absorbers and anti roll bar | ||
| Rear suspension | live axle with two trailing and two upper 45o links, watt's linkage, coil springs and telescopic gas shock absorbers | ||
| Steering system | Recirculating ball (no servo) | ||
| Brakes | front ventilated discs with 1 piston caliper 50.8mm diameter, rear drum 200mm with 1 double piston caliper 17.5mm diameter. (1980+: 228mm) diameter. 1979+: rear solid disks with 1 piston caliper 34.9mm diameter | dual circuit with vacuum servo | |
| Dimensions | |||
| length: 4.285 m (168.7") | width: 1.648 m (64.9") | height: 1.390 m (54.7") | |
| wheelbase: 2.420 m (95.3") | front track: 1.510m (59.4") | rear track: 1.500 m (59.1") | |
| Rims - tires | 5 JJ x 13", 15" | ||
| Weight | 925 kg | ||
| Fuel tank | 55 lt | ||
| Drag coefficient | 0.36, or 0.38 with headlights exposed | ||
Results in WRC
Races
Season
| Entry | Rally event | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Driver Codriver |
Team | MC | SVE Entry list |
POR | KEN | GRE | N.Z | FIN | C.Q | S.R | TdC Entry list |
RAC Entry list |
CdI | ||
| H. Nakagawa Osam Morikawa |
73rd | ||||||||||||||
| Nagashima Okanami |
dnf | ||||||||||||||
| Shinya Yamauchi Hagemu Yamaguchi |
dnf | ||||||||||||||
| Shigeo Kaneko Masanari Funakoshi |
Mazda Sports | gear box | |||||||||||||
| Kazuo Soma Koichi Iida |
Mazda Sports CC | gear box | |||||||||||||
| Hidekazu Fujinuma Hiroshi Kubo |
Mazda Sports CC | 70th | |||||||||||||
| Statistics | |||||||||||||||
| Others starts/finishes | 6/2 | 1/1 | 1/0 | 4/1 | |||||||||||
SourceRod Millen in RAC '81
SourceFB model '81
Drawings
Source
page revision: 92, last edited: 05 Sep 2021 03:49