Steve,

I'm still not sure my Aeromotive regulator is tracking MP correctly. I
pulled the data from my last few flights but haven't looked at MP / Fuel
psi yet. I replaced a leaking OP sender and after a few flights it
started showing low pressure (5-25 psi)sometimes in climbing. The EM-3
sender was always stable.  I replaced the sender and flew about two
hours Thursday morning. Seems to have fixed the problem. I also changed
my oil /water heat exchanger plumbing. It was plumbed between my two
radiators. Oil was tracking 15-20 degrees hotter than my water.  Water
at 200F and oil at 215-220F I have been needing to pull most boost and
lower the prop rpm once reaching pattern altitude. At pattern, reducing
climb to 600 fpm has allowed me to stabilize the oil temp. Oil has been
in the 220's a few times with water at 204F. In an attempt to transfer
more oil heat I re-plumbed the exchanger between the second radiator and
the engine inlet. This change seems to have moved 5 additional degrees
to the water. Water has gone up about 2 degrees. Still not good enough.
I will start looking at airflow and air delta-t after a family vacation
next week. My inlet total is about 58 - 60 sqin's. I am starting to
think the inlets may be a little small for the HP. I'm transferring
about 40-43 degrees of oil temp to the water so that part seems to be
working. Ground OAT during testing has been in the mid 80's to mid 90's.



Bobby- (headed to Arkansas)
RV-10 SC-Renesis
12 flight hours / 50 engine hours.