[Short block RB26 3.0L STEP3]
Newly developed 2-piece piston realizes increased stroke and connecting rod length while maintaining block height.
- The 3.0L dedicated crank is a full counter machined from nitriding steel, and ion nitriding treatment has increased the surface hardness to the limit and improved fatigue strength.
- In preparation for higher torque, a dedicated I-section connecting rod is used to improve buckling strength by 36%. In addition, we also adopted a φ22 thicker piston pin.
- As a countermeasure against the heat generated by the high power output, the valve guide and seat materials have been changed, and a sodium-filled EX valve and a piston with a cooling channel have been adopted.
By making the piston two pieces and raising the pin position, it became possible to reduce the compression height. This made it possible to lengthen the connecting rod and increase the length of the rod without increasing the deck.
In addition, the piston is super lightweight at 313g and has a cooling channel for oil cooling.
|Compression ratio (t=0.84)
|Allowable rotation speed
SHORT BLOCK RB26 3.0L STEP3