We've previously introduced the concept and specifications of the "Fine Tuning Rebuilt Engine," but this time we'll highlight the actual manufacturing process.

What we are aiming for is the "best engine for the street."
This is not hard tuning that sacrifices handling or lifespan, but rather fine tuning that makes the most of the original character while refining the lightness and smoothness that can be felt even in the city.

For example,Port processingIt is not so much "polishing" as lightly sanding.Sheet Cut,RefaceThe aim is not only to increase the airtightness of the combustion chamber, but also to smooth the connection between surfaces.
Since this is an extremely important "core" part that reduces intake and exhaust resistance, we will refrain from disclosing the details.

The cylinder block reproduces the tensile stress that occurs when the head is assembled."Precision honing with dummy head"This ensures high accuracy.
In addition, the crankshaftWrappingThis reduces friction loss and metal damage,
With flywheelDynamic Balance AdjustmentThis provides a smooth rotation feel.

In addition, each part is managed with precision that exceeds that of mass production.clearance,weight,Assembly TorqueWe work carefully down to the smallest details.
Because an engine is an assembly of hundreds of parts, the combination of these components creates a smooth, light feeling as the whole engine rotates.

Also, when rebuilding, "restoring" performance is an important theme.
Carbon and sludge build up over many years of use, as well as deterioration of clearances due to wear, can have a negative effect on airtightness and rotational balance.
Therefore, in parallel with the above work, consumables will be replaced with the latest genuine Mazda parts.