recapen(at)earthlink.net
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 Posted: Tue Jan 06, 2009 6:19 am Post subject: Engine warning parameters |
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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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