1)
On the intake side, there are several holes that appear to be
water
jacket holes for the intake manifold. I want to say I was told
these
are for warming the intake manifold with hot water for emissions
purposes.
I have yet to see an aviation intake that uses these holes.
Plug
with JB weld or epoxy putty?
I don’t recall
any holes to the water jacket on my 20B (that
doesn’t mean they weren’t there), but the were some holes for
exhaust gas recycle, and, I think some small holes that fed intake air to the
injector ports. The new intake flange just covers them all up.
2)
On the water pump housing where the thermostat is installed, there
is
a tubular bypass channel that returns to the water pump intake. I
have
read that if you remove the thermostat, this channel needs to be
plugged.
Best method? JB?
1/22” NPT tap
and a plug
4)
On the oil injection setup, those who are using it, are you
constructing
a linkage to connect the throttle to the injection pump for
proportional
metering or is the recommended practice to go simple and
wire
it in the full open position?
Just wire it a fairly
high position; I have mine at about ¾ of the travel.
5)
Anyone running a higher oil pressure relief valve on the rear
end
housing, and any benefit to this over stock. I have read that the
higher
pressure ones can contribute to oil burning and smoking... Same
question
for the Racing Beat catalogue parts for the enhanced oil pump
they
sell.
I have the 100 psi
valve, which results in more oil flowing to cool rotors and lube gears and
bearings. I don’t see how it could contribute to smoking or oil
burning. Is it necessary? Probably not. I don’t know about the RB pump,
my pump was billed as a “high output” pump by Atkins Rotary.
Al