Ben Baltrusaitis wrote:
I'll be visiting a local shop in a couple of
weeks that does a lot of
specialty work on the rotary. They are well know
in the rotary racing world
and have experience building drag cars. Two
options
they offer are "coolant porting and oil
passage porting".
I haven't heard any mention of this on the
list and was wondering if
anyone has any experience in this area or would
recommend either one or
both. It makes sense to me to improve the flow,
especially the oil, but I don't want to risk
any thin walls in critical
areas.
What do all of you think and what should I be
asking about these
modifications?
Thanks!
Ben
Rumor has it the oil temp can be reduced 10 to
20 degrees by changing
where the oil
comes out out of the block.
Paul Lamar
"Brian D. Cain" wrote:
Hi Ben,
The cooling passage porting is basically the
roughing up of some of the
water jackets around the spark plugs' area on each
rotor housing. Paul can
tell you more about this and whether or not it's
actually worth it.
The oil porting thing -> the only thing I can
think of is some work done to
the oil galleys in the front iron housing to
reduce pressure drop points.
There is no chamfering or edging work done on the
oil galleys once they're
machined. The oil, from the point of the strainer
to the first oil cooler
line, has to make about 5 or so sharp, right-angle
turns. Work can be done
to reduce those pressure drop points there.
Another thing that can be done
is enlargening and smoothing/scuffing/polishing of
the pickup galley where
the oil strainer bolts on. That seems to have a
positive effect by reducing
the workload of the oil pump and making it more
efficient.
Depending on how radical you want to go, there's a
number of things that can
be done.
B
___________________________________________________________________________
Brian D. Cain -/- Dallas/Ft. Worth, TX -/-
bdc196@comcast.net -/-
bdc@bdcmotorsports.com
BDC Motorsports | Performance Rotary Engines,
Haltech EFI Tuning &
Installation, Specialized port work
MSN bdc196@nospam.hotmail.com, Yahoo! bdc196, AOL
Symajhi, ICQ# 1733105
http://www.bdcmotorsports.com -/-
http://groups.yahoo.com/group/HaltechSupport
In aircraft at less than 100 HP per rotor use the
ribbing of the internal
water jacket has not been proven necessary. Perry
Mick and Chuck Dunlap both
flew their engines for hours at 220 to 230 F with
out apparent harm to the
rotor housings.
Racing Beat is fond of doing it for racing engines
however.
Here is what it looks like. Racing Beat also adds an
additional water
port for turbo engines generating over 300 HP per
rotor. Second picture.
Paul Lamar
Robert LeClercq wrote:
Paul
Where does that aux water port lead to? Also, can you
please post any pix of your remote water pump setup.
regards, Robert
Directly into the water passages that go by the spark plugs.
The water pump is also enlarged.
Paul Lamar
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