I ordered 2 Griffin radiators and
installed that, had to modify the air ducts
A water radiator: no:
GRI-2-58185-X
CROSSFLOW - DUAL ROW 1-1/4"
tubes
core 18" X 13" X
2.75" 234 sq. in. 643 cu.
in.
A custom made oil radiator no:
CX-27256-01
core 18" X 7.5" X 2.75" 135 sq.
in. 371 cu. in.
added a spall 10" fan (15 amp.) to
the oil radiator
Still not enough cooling, could not
climb at full power for more than a few minutes before the oil reached 220 deg.
F.
I had nore than eough water cooling, so I
Built a oil/water heat exchanger
and added that in series with the Griffin oil rad.
That did not work too well, not
enough cooling.
Removed the Griffin oil rad. and the
fan.
Replaced it with the original RX7 oil
radiator
core 17.5" X 4.5" X
2" 78 sq. in. 157
cu. in.
Kept the oil/water heat exchanger in
series with the oil rad.
Air flow;
Water rad air in 84 sq.
in. air out 180 sq. in.
Oil rad air in 40 sq.
in. air out 54 sq. in.
I think this last system works ---
finally
The outside air temp is presently
between 30 and 40 deg. F. so it is hard for me to tell how it will work in the
summer but the indications are good. I had to plaster the front of
the water rad. with duct tape to raise the engine temp. and block the oil rad.
air exit to reduce air flow. The oil rad. air flow is reduced to 12 sq.
in. at the moment and not much air is flowing through the water
rad.
I have no water thermostat and no oil
thermostat so I have to control the temp with the air flow.
I need to build vanes to control the
air flow, that is what I am working on at the moment.
I consider this installation much
simpler and easier to maintain. The reason I figured that the griffin oil
cooler was not working properly, the air flow behind the rad. was not
getting higher than abour 85 deg. F even when the oil was at 220 de. F On
the other hand the griffin water rad. seems to work fine. Now the air flow
temp behind both rads. goes to about 130+ deg. F
A photo of the present
installation.
Rino Lacombe
Renesis powered Glass
Goose
----- Original Message -----
Sent: Thursday, October 29, 2009 1:19
AM
Subject: [FlyRotary] Re: Tracy RV8
Cooler weather is helping now but still a work in
progress. I'll write up a report when the problem is fully
solved.
Tracy
On Wed, Oct 28, 2009 at 6:56 PM,
<stevei@carey.asn.au>
wrote:
Hi Tracy
Are you in a position to give us a
further update on the cooling of the RV8.
Thanks
Steve
Izett
Perth Australia
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