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Message
Paul,
Just a comment on your sensor
placement. If you locate it in the hole in the top of the end housing you
will see higher temps than at the engine outlet. This is because the
coolant flows down the hot (plugs) side first, then across and back through the
cold side. Measurements at the end housing should give you the highest of
the two readings. I don’t know how exactly how much disparity there
will be though.
Mark S.
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Paul
Sent: Wednesday, March 23, 2005
10:48 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: water
temp sender connections
Thanks, Ed....I just ordered a 250F/120C VDO sender with an
M10x1 thread from egauges.com (Thanks, Rusty). It will connect to my AV-10
engine monitor. I will be able to compare it to the reading I get from
the sender mounted in the thermostat housing. which is connected to my ECU
which has a panel display which shows water temp in Celsius. If there is a
large disparity, I will have to come up with an alternative, but if it is
within a few degrees, I will call it successful. Thanks again. Paul Conner
----- Original Message -----
Sent: Wednesday, March
23, 2005 9:25 AM
Subject: [FlyRotary] Re:
water temp sender connections
Paul, just a note of caution, if you are tempted to use the
small Mazda coolant sensor location on the rear housing near the oil
pressure sensor, be aware it is very none linear (perhaps the Mazda coolant
gauge is as well {:>)) - if you are using another sensor then
disregard. I thought I was getting temps of over 250F by monitoring the
Mazda Sensor in that location - until I calibrated it in a pot of water and
found out the temps were closer to 210F.
----- Original Message -----
Sent: Wednesday, March
23, 2005 12:25 AM
Subject: [FlyRotary] Re:
water temp sender connections
The engine has a stock water temp sender next to the oil
pressure switch. I will try using that to send temp information to my engine
monitor. If that does not work, I will install another temp sending unit
like the one that came stock in the water pump housing.
Glad to hear you're getting real
numbers now, give or take that silly metric system :-) I'm not
sure what the specs are on the stock sensor, but you can get aftermarket
sensors that fit the rear housing hole. The thread is M10 x 1.0,
and egauges.com has them in at least the VDO range of
resistance.
Rusty (hoping it will rain
hamburgers for Tracy)
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