Hi, Paul....I was hoping you could tell me all the engine paramaters I

should monitor on a 13B

aircraft installation. The manufacturer of the engine monitor I want to

buy needs to know

everything I wish to monitor so he can tailor the unit to my application.
    I assumed oil temp and pressure, water temp and pressure, cylinder

head temp (I assume I can

just use two spark plug conductors)?  Also RPM of course. EGT (one or

two)?  Anything else you can

think of would be greatly appreciated.  Thanks in advance for your reply.

Paul Conner, Mobile, AL

This is what we would like to know.

Temp into the rad
Temp out of the rad
Oil pressure.
Temp into the oil cooler
Temp out of the oil cooler
Cooling system pressure out of the pump and into the block.
Cooling system pressure out of the block.
Cooling system pressure out of the rad and into the pump.

RPM
Intake manifold pressure
Two EGT's.
Two cyl head temps at base of the spark plugs.

Fuel air ratio with O2 sensor
Fuel flow GPH
Fuel totalizer
MPG with GPS ground speed input.
Ignition advance.
Knock sensor.
Water pump flow in GPH

Did I miss anything?

Paul Lamar

Paul,
As a follow up to my last email, these are the sensors I am looking for. You
have added a couple that I had not contemplated. What type/who makes an
appropriate water flow sensor? 

That is a very good question. I would love to have something we could
place in a stock radiator hose with a couple of hose clamps.

Also, I looked at your design for the knock
sensor. How does the Mazda sensor detect detonation? 

Digital signal processing I think. Hard to know as we don't have
a schematic on the Mazda computer or the source code to the software.
The human brain is a wonderful real time digital signal processor
and it is easy for us (and my dog Mikey) to detect the unique noises 
detonation generates.

For my turbo I was
thinking about intercooler in/out temps and possibly water and oil discharge
temps. 

Good point. Intake manifold temp is extremely important when it comes to knock.
A P38 was flown on intake manifold temperature to prevent knock
from the hot turbo air.

This also brings up another good discussion for me. That is,
assembling and wiring all of the components and sensors in a rugged durable
fashion. I am currently shopping the net for connector manufacturers that
would be appropriate. The automotive industry has some good designs but, I
have yet to find a source to buy the different types.
Thanks
Dean
P.S. I noticed my grammar and spelling in a couple of past posts...I
shouldn't try to communicate when tired!

I highly recommend http://www.Digikey.com  and Newark Electronics.

Paul Lamar
 
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