To an ultra-smooth feeling that goes beyond mass production.
Handmade RE assembled with high precision.

The rotary engine (RE), which is said to blow up smoothly to high rpm like a motor, has a rotor that rotates inside the eyebrows-shaped rotor housing, and intake → compression → explosion → exhaust proceed at the same time.It has an extremely simple and original structure that does not have a valve mechanism such as an intake / exhaust valve.Apex seals, side seals, and corner seals are built into the essential rotor, and each seal is equipped with an initially set spring.Using the spring force and the force of the combustion gas, the seal is pressed against the housing to maintain the airtightness in the combustion chamber and convert the compression pressure into the output in the rotational direction.
Therefore, in order to obtain the power as designed, high airtightness that converts the compression pressure into an output without leakage is required.In order to achieve smooth rotation, it is important to equalize the pressure in 2 rotors and 6 chambers, and in order to achieve both sides at a high level, dimensional control of mass-produced engines that allow a certain tolerance is limited. It's all about digging into it.
For example, the clearance between the corner seal and the side seal called ΔE.The tolerance for mass production is 0.10 mm, and the usage limit is 0.40 mm.The RX-7 engine, which is supercharged by a turbocharger and receives high temperature and high load, and the high rotation type RX-8, which has low friction, have different tuning methods in detail, but we ensured high airtightness. In order to make each room uniform, we thoroughly control the dimensions of 1/100 mm or less by taking advantage of the strength of handmade production.
The effect of the tuning is not only the improvement of output but also the acquisition of ultra-smooth rotation feel and response with stability and quietness.So to speak, it is finished in an RE-like engine that exceeds mass production.In addition, for the RX-7, the stepped correction of the exhaust port, which is directly linked to the performance difference, was made to improve the instantaneous power of the RE turbo.
While preserving the original concept of the one and only power unit, further refinement.I want you to lead your Seven / Eight to active life with a fine tuning engine.

<Product features>

Main clearance management points

There is a clearance control point between each seal and the rotor, and the usage limit value is determined in detail from the standard value for each.Aged vehicles have a decrease in compression pressure due to excessive clearance.

Handmade production by skilled technicians

Dimension control of 1/100 mm or less, such as assembling a seal to the rotor.It is a work that is scrutinized by the production of one item by craftsmen.

Uses the latest genuine Mazda parts

All replacement parts are the latest genuine Mazda parts (see below).In addition, the reused parts will be assembled after undergoing rigorous measurement and correction work.

<Main new replacement parts>
■Uses the latest genuine Mazda parts

<Notes>

-This product requires a trade-in of an unmodified movable engine.In principle, please return the trade-in engine within 2 weeks after the engine arrives.
-If the trade-in engine is immobile or internal damage is found due to broken seals, the following parts costs will be incurred.Please note.
●RX-8: Rotor (front/rear) / Housing (front/rear) / Intermediate housing / Eccentric shaft / Peripheral parts of the parts listed on the left / Oil pan
● RX-7: Eccentric shaft / oil pan
・ Depending on the stock status of the core engine, it may be possible to support OH, which will take care of your engine first.Please contact us for details.

<Recommended parts for simultaneous replacement after installing the engine>

Since the peripheral parts of the engine are expected to deteriorate over time, it is recommended to replace the following parts at the same time.
・ Electrical parts: engine harness and plug cord
・ Fuel system: Fuel injector ・ Fuel pump ・ Fuel filter
・ Others: Engine mount, differential mount, etc.

<Product compatibility table>

■ Fine Tuning Rebuilt Engine