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1. 06:19 AM - Engine warning parameters (Ralph E. Capen)
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| Subject: | Engine warning parameters |
Folks,
I am configuring my engine monitor system (AFS3400EM) in preparation for first
flight.
The engine configuration is as follows:
IO360B1F6 with 9.2:1 pistons, AFP injection, LASAR ignition, Vetterman dual crossover
exhaust system with heaterboxes/mufflers, and MT 3 blade CS prop (MTV12B
183-59) within a SamJames cowl and engine cooling plenum. The oil cooler is
behind the #4 (left rear) cylinder and the cabin heat take-off is behind the
#3 (right rear) cylinder - the cabin heat take-off will need to constantly flow
air to cool the mufflers/heaterboxes per Vetterman. Manifold pressure port
is on #2 (left front) cylinder. CHT sensors are mounted on the underside of the
cylinder heads in the provided threaded ports. EGT sensors are all mounted
approximately 2" below the interface flange for the exhaust pipes through a hole
in the exhaust pipes - the variance between cylinders in mounting distance
should be less than 1/4". I do understand that the mounting distance can influence
the temperature reading - some of my pipes barely allowed this distance
before bending.
I have performed brief idle testing to determine low idle capabilities and have
idled as low as 550RPM. The low idle stop is currently set for 700 RPM. Other
than the factory run time, I have just under an hour on the hobbs meter.
The Engine monitor has multiple warning points and I would like to set them up
for optimal warning capabilities.
Oil pressure Max, Min (0?), High yellow warn, High red warn, Low yellow warn,
Low red warn
Oil temperature Max, Min (0?), High yellow warn, High red warn, Low yellow warn,
Low red warn
Fuel pressure Max, Min (0?), High yellow warn, High red warn, Low yellow warn,
Low red warn
Fuel flow Max, Min (0?), High yellow warn, High red warn, Low yellow warn,
Low red warn
RPM Max, Min (0?), High yellow warn, High red warn, with mid-bands
to accomodate
propellor operating restrictions (according to MT, I don't have any)
Manifold pressure Max, Min (0?), High yellow warn, High red warn
CHT Max, Min (87? - lowest seen even with 0 ambient), High yellow
warn, High red warn
EGT Max, Min (87? - lowest seen even with 0 ambient), High yellow
warn, High red warn
Can you provide suggested numbers to put in to my engine monitor for these warning/operating
parameters?
Thanks,
Ralph Capen
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