Paul,

Every wonder how RB aluminum housings look ready to assemble?  These
pictures come courtesy of Russ who arranged them in a 13B format for me
to cherish. He remarked that the aluminum housings are so light he
almost launched one towards the ceiling.  Notice the robust thread
savers in the front housing, and the better oil pathways built-in.

Not sure why there is another hole next to the oil filler neck hole.
Apparently the holes join into the same chamber.


Cheers

Doug in Japan.

Interesting Doug. Thanks for uploading those pics.

That hole looks like a simplification of the rotor oil drain back
and crankcase breathing system. The hole is probably necessary
to support the casting core. In the stock Mazda center housing
there is a core plug in that location.


I like that straight out of the oil pump to the oil cooler
feature. Apparently they have done away with the front oil control valve.
I see no oil passage to the front cover in that area.

I wonder how that oil pump surface is going to hold up.

The other big question is the rotor wear surfaces.

What is the most number of hours RB has with these things
with the latest wear coatings? Has he mentioned anybody that is running
them? Jim has changed coating suppliers a couple of times.

Last but not least what is the current cost of these things?

Paul Lamar

Pretty!

The ones depicted there have side ports, but RB offers them without.

http://www.racingbeat.com/resultset.asp?PartNumber=11051

Claimed weight savings of 15.4lb (25.9-10.5lb) for the intermediate
and 12.3lb for the rear housing (25.8-13lb) is pretty good.

-Chris



So, would this get the weight of the engine under 150 lb?

Steve Brazil

About for the bar block. No psru, cooling, intake or exhaust manifolds.


Paul Lamar