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Rusty,
Livermore Performance
(http://www.livermoreperformance.com/XRP_Adapters.html)
has a fitting that I found very handy for adding instrumentation to my
20B installation. I used their p/n 700198 to add a temp sensor at
the front cover. It has NPT on one end and -8 AN on the other, with
a 1/8" NPT in the middle. Since I had previously tapped my
front cover for a NPT to AN fitting all I had to do was swap fittings and
I then had a port for the new sensor. This kept me from having to
remove and drill & tap the front cover. It worked out
great. BTW, this sensor was added so I could determine the delta T
for the oil cooler.
They also have a p/n 700199 with an AN male to AN female and a 1/8 NPT in
the middle. This can be used to monitor temps/pressures at various
places in the oiling system by moving it around as needed.
One caution though, be careful that the temp sensor doesn't protrude too
far into the passage so that it restricts the oil flow.
Mark S.
At 09:50 PM 9/7/2004 -0500, you wrote:
Thanks for all the comments, and
particularly the rational logic from Al.
New decision:
I ordered an AN12 male to female 45 degree fitting, that I can put
inline
with the hose from the engine to the oil cooler. I should be able
to tap
this for 1/8" NPT, and install a 150 psi pressure sender (also
ordered). I
may, or may not fly it this way, but at least I'll know what the
true
pressure is at the evap core. If it's less than 100, I'll just
carry on
with the current configuration, and believe that my original core
failed
because it was damage.
I don't believe the evap core is restrictive, but I'll find out for
sure
with my pressure test. I'll actually be measuring the core, and
filter
together, so it's really worst case.
As for temps, I can believe that the cruise temp should be less than 210
for
sure, but perhaps it's reasonable to allow the climb temp to go to maybe
230
for a few minutes. How long can that possibly shorten the life of
the
seals? If you figure the engine is good for at least 2000 hours
under
normal conditions, that will be about 5 lifetimes for me, so I think I
can
stand a little reduction in TBO.
Cheers,
Rusty (much better now)
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