Engine Builds | 4 Rotor

4-Rotor

The highest rung on the Mazda performance ladder, the 4-Rotor 26B delivers neck snapping horsepower and torque that will take your breath away. Why shop overseas? Located right here in the United States you can get a custom 4-rotor without dealing internationally. We offer complete 4-rotor engines at various levels of horsepower, and cost.

The custom built 4-rotor is one of the most technically involved rotary engines ever conceived. From start to finish, each part is carefully machined to the tightest tolerances and assembled by hand with specific detail only Defined Autoworks can provide. Horsepower potential quoted is an average tuned result. Much more can be produced depending on individual skill in n/a tuning.

  • Balancing
  • Fuel Delivery
  • Porting
  • Turbocharging
  • Rebuild
  • Replacement

4-Rotor | Side Port only
Naturally Aspirated 425+ HP
Turbocharged 900+ HP

Uses 12a side housings for the tallest primary ports, all side housings are reconditioned and re-nitrated for brand new finish. Complete street port to "circuit" specs. 9.7:1 rotors, fitted with all new side seals, corner seals, oil retaining rings, oil o-rings, coolant o-rings and springs. High performance 2mm apex seals with brand new springs. Brand new rotor housings porteBd to "race" port exhaust.

  • 425+ HP
  • 8,000 RPM Limit
  • Smooth Idle
  • 12a side housings
  • Fully Dynamically Balanced
  • Blueprinted
  • $28,565

4-Rotor | Peripheral Port
Naturally Aspirated 500+ HP
Turbocharged 1200+ HP

Most popular 26B build. Durable and cost effective this unit can be ran non-turbo or boosted with excellent results. This same engine can be built in several configurations such as: streetport, bridgeport, or semi p-port. Uses late style 13B side housings, all side housings are reconditioned and re-nitrated for brand new finish. 9.0:1 rotors, fitted with all new side seals, corner seals, oil retaining rings, oil o-rings, coolant o-rings and springs. High performance 2mm apex seals with brand new springs. Brand new rotor housings, machined and fitted with full peripheral port, "race" port exhaust.

  • 500+ HP n/a 1000+ hp turbocharged
  • 8,000 RPM Limit
  • Aggressive Idle
  • Late 13B side housings
  • Full Peripheral Port, optional side port, optional semi peripheral port
  • Fully Dynamically Balanced
  • Blueprinted
  • $30,565

4-Rotor | Peripheral Port 650+ HP naturally aspirated. Not for turbocharged use

This is a full race spec 26b, intended for competition use. 9,500 rpm capacity and 10,000 rpm limit. Uses extensively lightened rotors, brand new late style 13B side housings. 9.7:1 rotors, OEM side seals, corner seals, oil retaining rings, oil o-rings, coolant o-rings and springs. Ultra high performance 2mm Iannetti Ceramic apex seals with brand new ceramic tip springs. Brand new rotor housings, machined and fitted with full peripheral port, "race" port exhaust. Fully dynamically balanced and blueprinted. Extra clearance deep groove race bearings for high rpm safety. 650+ hp, aggressive idle. 9,500 rpm recommended limit. 10,000 rpm max potential. Must use our complete Drysump system available separately.

  • 600+ HP
  • 10,000 RPM Limit
  • Aggressive Idle
  • Late 13B side housings
  • Full Peripheral Port
  • Fully Dynamically Balanced
  • Ceramic Apex Seals
  • Race Bearings
  • Blueprinted
  • $39,525

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