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MTK Archives · Mazda RX-7 FC
Revolution FC3S
Power470 HP
Engine20B
Displacement1962 cc
Built by Saitama-based rotary specialist Revolution, this Mazda RX-7 FC3S revives the visceral spirit of historic naturally aspirated, peripheral-port rotary racers like the SA22C and RX-3. Designed around instantaneous throttle response and strict race-engine tolerances rather than forced induction, the project combines an aggressively set-back multi-rotor layout with extensive competition chassis preparation to demonstrate the shop’s circuit-honed tuning philosophy.
Car Gallery11 scans
Overview
| Chassis Code | FC3S |
|---|---|
| Drivetrain Layout | FR |
| Shop Location | Saitama |
| Concept | Naturally aspirated, high-response rotary build evoking classic peripheral-port racers. |
Engine
| Engine Code | 20B |
|---|---|
| Power | 470 HP |
| Torque | 441 Nm |
| Displacement | 1962 cc |
| Balancing / Assembly | Fully balanced block with reinforced parts |
| Throttle Bodies | TMW 50 mm, one per rotor, open funnels |
Rotary
| Porting | Peripheral port |
|---|---|
| Rotor Housings | 13B housings, three-rotor layout |
Fuel & Ignition
| Injectors | 550 cc x 6 |
|---|---|
| Fuel Pump | Nismo |
| Ignition | WAKO CDI x 3 |
Engine Management
| ECU | MoTeC |
|---|
Exhaust
| Exhaust / Muffler | Revolution one-off |
|---|
Cooling
| Radiator | Modified FD3S |
|---|---|
| Oil Cooler | Mazda 787B |
Drivetrain
| Clutch | OS Giken twin-plate |
|---|---|
| Transmission | Revolution original close-ratio (FD3S) |
| Differential (Rear) | Mazdaspeed LSD, increased initial torque |
| Driveline Notes | Engine set back in the chassis; propeller shaft shortened 180 mm to suit |
Suspension
| Dampers / Coilovers | Custom Ohlins |
|---|---|
| Spring Rate (Front) | 8 kg/mm |
| Spring Rate (Rear) | 6 kg/mm |
| Springs | Straight-wound |
| Chassis Bracing | Roll cage ends tied directly into the rear strut housings in place of a strut tower bar |
| Suspension Notes | Front and rear pillow-ball upper mounts with front camber adjustment |
Wheels & Tires
| Wheels | Panasport G7-C5C2 |
|---|---|
| Tires | Bridgestone RE710 Kai |
Chassis & Rigidity
| Roll Cage | Custom welded roll cage |
|---|---|
| Reinforcement | Roll cage fully welded to the pillars and body floor |
Exterior & Aero
| Front Bumper | Anniversary |
|---|---|
| Bonnet / Hood | ERC |
| Mirrors | RE Amemiya |
| Windows | Acrylic side windows and rear hatch |
| Exterior Notes | Body fully repainted to a detailed finish |
Interior
| Seats | Custom bucket seat |
|---|---|
| Gauges / Meters | Auto Meter tachometer, water temperature, oil temperature, oil pressure |
| Interior Notes | Rear seats and trim removed, custom center console |
Other
| Assembly clearances | 5/1000 mm, built in a temperature-controlled room |
|---|