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Hi
Guy's
I brought home a new mag
tube & transmitter, which I tested first against a calibration standard, so
I'm certain of it's accuracy. I ran a full set of tests tonight and was somewhat
surprised at the results.
I
ran the first test with the Ford evap cores in the system, plumbed in
parallel.
- Max flow 9.3 usg/m 35 l/m
- 12.07 volt battery supply voltage
- .49 amps current draw
- 1.8 amps max inrush current
Second test had no evap cores in
the system. Simply recirced water through pump - engine - header tank -
pump.
- max flow 13.0 usg/m 49 l/m
- 12.06 volt battery supply voltage
- .37 amps current draw
- 3 amps max inrush current.
Third test, I plumbed in a set
of GM (Harrison) evap cores in parallel, into the system. I hung them just below
my mounted Ford cores, using they same pipe sizes in an effort to have
comparable test conditions.
- max flow 7.7 usg/m 29 l/m
- 12.4 volts supply voltage (I hooked a trickle
charger to the battery)
- .47 amps max current draw
In each test configuration test
results are with heater valve closed. Heater core added .5 usg/m in each
case.
In all of the above tests the
electronic pump controller was bypassed to give full battery voltage to the
pump. With the pump controller in use, as the water was cold well water,
controller had pump at minimum flow which was measured at .6 usg/m - 2.2
l/m. I suppose I should have dipped the RTD probe into hot water to watch the
flow increase, however all test equipment is packed up and system is back
together.
I just reviewed the spec on the
pump and Davies Craig claims 20 - 80 l/m. So I guess in this system I'm within
those specs. I was surprised that I didn't have a higher flowrate with no evap
cores in the system. I was really surprised that the GM cores had a lower flow
rate than the Ford cores as I had been warned that they would not provide
sufficient flow. This is a pleasant surprise as I found that the Ford cores were
easier to find, easier to remove from the plenum, easier aluminum to weld on and
far easier to mount. Hopefully they will also work better.
Another pleasant surprise was
that the current flow is so low. Even the inrush current didn't peak as high as
the 7.5 amp max current in the pump specs.
My cooling system uses 1.25" rad
hose until the "T" to parallel the rads where I have 2, 1" hoses. Some of may
recall the EWP adapter block that I built last fall. That had 3/4" hose nipples,
which I removed and replaced with 1" nipples, opened up the ports on the inside.
This ensures that I have no restrictions generating any excess heat or loading
the EWP.
I hope this helps answer some
questions. I'm still looking forward to Leon's results, and of course I will
update everybody when I actually run this engine (soon).
ps. I hacked out some chunks of aluminum pipe and
replaced with 1" hose.S. Todd Bartrim
Turbo 13B
rotary powered
RV-9endurance (FWF)
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Imagination
is more important than
Knowledge"
-Albert Einstein
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