In a message dated 7/3/2006 12:42:22 P.M. Eastern Daylight Time,
wgeslick@gmail.com writes:
Lynn, et al,
Finally getting a chance to look at the engine closer. The oil jets
are clean for both rotors, so there goes that theory - maybe.
Can you tell me if I made a mistake when I took out the ball and
spring valves below the jets and drilled them out to 5/64. (This engine
was put together in the last century by a younger me.)
Also, careful pre-assembly of the bypass valve assembly and front shaft
components shows that the bypass hole is only slightly over 1/2 blocked.
Should this not be completely shut off? Perhaps the pressure that should
be cooling the rotors is just not available?
I am going back in with Tracy's overhaul kit, and it appears that
includes a new thermal pellet plug, so I will check the opening again with the
new plug. I suspect my home-made unit was just installed on faith using
measurements from who-knows-where.
I will post any further findings as they occur!! All ideas
gladly considered!!
The thermal pellet should be discarded and a solid
plug installed. A failed pellet can destroy the engine. Or use the
early crank that has no such pellet.
For stock oil pressure (71.1 pounds) for all but
twin turbo engines) Racing Beat says remove the balls and springs and install a
Weber .200 main jet. I use a 180 jet but I have 100 PSI all of the time. The
balls and springs are there to maintain hot idle oil pressure, and assist in
rapid warm up. At idle RPM, no cooling oil is sprayed into the rotors.
Once the RPM comes up a bit, the centrifugal
force and oil pressure push the balls off of their seats and cooling
oil flow is controlled by the stock metering jet hole.
But remember that this is cooling oil for the
rotors, and it is also a big oil leak in a system with a just barely adequate
oil pump.
I have never heard of drilling the stock jet hole
bigger. If anything the holes are more than adequate in stock trim.
Oil temps over 210 are verboten, IAW the Racing
Beat Catalogue. Anything over 160 is costing HP, but is hard to maintain.
Water not over 180 flat out.
Lynn E. Hanover