Turbocharged Engine Operating Recommendations

Discussion in 'Firewall Forward / Props / Fuel system' started by HomeBuilt101, Jan 24, 2020.

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  1. Jan 24, 2020 #1

    HomeBuilt101

    HomeBuilt101

    HomeBuilt101

    Well-Known Member

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    Location:
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    I wanted to reach out to the collective and see if I could get some recommendations on the operation of my turbocharged (not turbo-normalized) engine...essentially information such as what power settings do the people who are running a turbocharged Lycoming use for takeoff/climb/cruise and other tips and tricks.

    The engine is following:

    -Lycoming IO-540 (150 HRS since non-certified but complete overhaul)

    -Was not originally turbocharged

    -Bendix Fuel injector AirFlow Performance with balanced nozzles

    -Pistons 7.3:1 compression and all internals are balanced

    -Camshaft “Aircraft Specialties Phase III grind” (whatever that is)

    -Turbo Single Garrett turbocharger with intercooler

    -TIAL wastegate with "small green 4.34 PSI spring" (THANKS Ross...finally got it installed and running)

    -Ignition Dual Lightspeed Engineering Plasma III

    -Propeller 3 blade MT composite

    -Engine monitor Dynon Skyview

    -EGT probes are mounted 2 inches down the exhaust pipe in all cylinders

    -Running 100LL AVGAS

    So what I would like to know is what are people running their engines under the following conditions (if you can describe your engine so as to get an apples to apples comparison):


    -Takeoff

    -MAP Inches Mercury

    -RPM


    -Cruise Climb

    -MAP Inches Mercury

    -RPM


    -Cruise

    -MAP Inches Mercury

    -RPM


    I also need to set the different colors of the engine monitor so I would greatly like to know what color bands to set the following:


    Oil Pressure

    -High red

    -High yellow

    -Green

    -Low yellow

    -Low red


    Oil Temperature

    -High red

    -High yellow

    -Green

    -Low yellow

    -Low red


    EGT:

    -High red

    -High yellow

    -Green

    -Low white


    TIT:

    -High red

    -High yellow

    -Green

    -Low white


    CHT:

    -High red

    -High yellow

    -Green

    -Low white


    Propeller RPM

    -High red

    -Green

    -Low red



    As always...THANKS for your advice!!!
     
  2. Jan 24, 2020 #2

    wsimpso1

    wsimpso1

    wsimpso1

    Super Moderator Staff Member

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    For a first read, you need Mike Busch on Engines. He has specific advice on EGT, mixtures, etc. Then Lycoming does have a manual for your specific engine, with limits on many parameters.
     
  3. Jan 24, 2020 #3

    TFF

    TFF

    TFF

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    I would look at the numbers for the Aerostars. You also might look at turbo Lances. My guess is takeoff is 36”, cruise 29”, TIT Set to 1550 in cruise, I would not want to see more than 420 CHT. Hopefully 400. I would set 420 yellow 460 red for cht. 500 is usually real redline but you want to be on it before it gets there. TIT I would want it to go red at 1620 with a real redline of 1650, yellow at 1600.
     

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