Paul,
I looked at my Rx8 rotor and the measurements are the same for the pin
locations - except for the 3 identified in the attached drawing.
These 3 positions are exactly where there are positions for pins in the
'cut in half' rotor picture i.e. they just fill in the gaps.

So from this data, I can only assume the internal voids are exactly the
same for all rotors.
George ( down under)


I know that not to be the case. The RX8 rotor internals are different as is
the way they are cast. Also here is another cut away rotor picture.
Don't know the year. Last picture.

Paul Lamar

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Paul,

Excellent example, as it shows the progress in rotor design. My thoughts was
that the rotor needed some circular movement of the oil around the rotor,
not just through it and your photo confirms that. It would also suggest why
some rotors are lighter.

I thought there was an RX8 motor showing internals and the rotor was also
cut in half - does anyone have that or remember that ?

I might have been dreaming it!

George (down under)


I have a dwg. The oil must get out of the chambers some how so on the drain back
side of the rotor all chambers are connected together.

Paul Lamar

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