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  1. #1
    SrTelemaster150's Avatar
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    New HP Benchmark For a N/A Saito FA180

    Sato FA180 12.77:1 Compression ratio via .035" case deck reduction. C&H Electronic Ignition, Saito 220 Big Bore Carburetor 12mm bore, 180 intake manifold ported to 12mm on the updraft. O'Donnell Speed Blend glow fuel 30% nitro/8% lube.

    8850 RPM W/Dynathrust 18x8 prop 23.21# static thrust, 3.95HP.
    Club Saito #785 - FA91S, FA150, FA180, FA180HC/BBC, FA200TI, FA300TTDP: All with CH Ignitions CDI/Glow fuel
    SIG BH #41
    - 1/3 Spacewalker, Rascal 110
    CUB BH #231 - Wings Maker 1/5 J-3 Cub

  2. #2
    SrTelemaster150's Avatar
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    RE: New HP Benchmark For a N/A Saito FA180

    Delete double post
    Club Saito #785 - FA91S, FA150, FA180, FA180HC/BBC, FA200TI, FA300TTDP: All with CH Ignitions CDI/Glow fuel
    SIG BH #41
    - 1/3 Spacewalker, Rascal 110
    CUB BH #231 - Wings Maker 1/5 J-3 Cub

  3. #3
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    RE: New HP Benchmark For a N/A Saito FA180

    Damn!
    I might not be very good, but I'm fun to watch!

  4. #4
    SrTelemaster150's Avatar
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    RE: New HP Benchmark For a N/A Saito FA180

    ORIGINAL: eddieC

    Damn!

    You can get some background about the engine in THIS THREAD.
    Club Saito #785 - FA91S, FA150, FA180, FA180HC/BBC, FA200TI, FA300TTDP: All with CH Ignitions CDI/Glow fuel
    SIG BH #41
    - 1/3 Spacewalker, Rascal 110
    CUB BH #231 - Wings Maker 1/5 J-3 Cub

  5. #5

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    RE: New HP Benchmark For a N/A Saito FA180

    What did it spin that prop before that?
    AMA # 126183
    Fly light, fly fast and fly low.

  6. #6
    SrTelemaster150's Avatar
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    RE: New HP Benchmark For a N/A Saito FA180

    ORIGINAL: airraptor

    What did it spin that prop before that?
    There are RPM readings for the variuos configuartion of the engine tested W/15% Cool Power glow fuel listed below. They include RPM readings for a standard compression ratio FA180 W/glow ignition, a standard compression FA180 W/CDI & the high compression FA180 W/CDI & the FA220 "Big Bore" carburetor.


    ORIGINAL: SrTelemaster150

    I finally got an ideal day for testing the power output differences for my Standard compression Saito FA180 on glow ignition, the standard compression FA180 W/CDI & the High Compression FA180HC CDI BBC (FA220 Big Bore Carburetor) All testing W/the same 15% Cool Power glow fuel

    For those not familiar W/the high compression FA180HC project, an illustrated write up is available HERE.

    Since the FA180HC BBC was on the test stand I double checked the ignition timing. The timing was set @ 34* BTDC. That will give 34* BTDC @ WOT when running @ high RPM. I'm not sure what the advance curve is, but the 24* retard @ start would give 10* BTD ignition timing @ start & idle.

    The 220 Big Bore carburetor has the same bolt pattern as the 150/180 carburetors, it is 12mm bore (the 180 carb is 11mm. the 150 10mm) I bored the updraft portion of the FA150 manifold I had on hand out to 12mm. The horizontal runner where the manifold interfaces W/the intake port was bored out to the standard FA180 ID to match the 180 intake port.

    Interesting note: The aluminum intake gaskets that come W/the FA180 are smaller in I D than either the intake manifold or the port on the cylinder head. It appears to be the same ID as the 150 port/manifold. Since I have not had any issues eliminating these gaskets on any of my 150/180 engines, I chose to eliminate it for a smoother transition from the manifold to the intake port.

    After fiddling W/the HSN, the FA180HCCDI BBC spun the Dynathrust 18x8 prop @ a solid 8400 RPM flashing 8500, idle was steady 1100 RPM. @ 8450 RPM that generated 3.44HP W/20.44# Thrust.

    The standard compression FA 180CDI had the timing checked & set @ the same 34* BTDC.

    After tweaking the HSN, the FA180CDI spun the same 18x8 prop @ 8000 RPM flashing to 8100, idle was a steady 1200 RPM. @ 8050 RPM that generated 2.98HP W/18.55# Thrust

    The CDI was unhooked, the sparkplug replaced W/a glow plug. The needle setting were opened up to OEM start up specs & the engine started on glow ignition.

    After setting the HSN & LSN, the FA180 on glow ignition spun the 18X8 prop @ a steady 7900 RPM, the idle was a rough 1400 RPM but it was reliable. @ 7900 RPM that generated 2.81HP W/17.86# Thrust.

    CDI ignition gave an additional 150 RPM, .17HP & .69# of thrust over glow ignition & reliable idle was was 200 RPM lower.

    The compressionn ratio increase to 12.77:1 from the stock 9.56:1 coupled W/the 12mm FA220 Carb really brought on the power.

    The increase for the standard compression F180CDI version was an additional 400 RPM, HP increased by .46HP (15% HP gain) W/1.89# additional thrust (10% thrust gain) & another 100 RPM lower idle speed.

    Comparing the gains from the standard glow ignition FA180, to the FA180HCCDI BBC, HP went from 2.81 to 3.44, .63HP gain, (22% HP gain) thrust increased from 17.86# to 20.44#, a 2.58# gain (14% thrust gain) W/300 RPM slower dependable idle speed.

    This puts the FA180HCCDI BBC squarely in the power output range of the FA220 W/much better fuel economy & less weight in a more compact engine package. I am very pleased W/the results.

    I had also done tests W/the high compression FA180 CDI using the standard 180 carburator & the RPM levels were about midway between the FA180 CDI std CR engine & the FA180 HC CDI engien W/220 BB carb.

    Total gains for the FA180HC/CDI/BBC on 30% nitro from the original glow ignition FA180 W/15% Nitro were 950 RPM, (12% increase) 1.14 HP (41% increase) & 5.31# of static thrust. (30% increase)

    Club Saito #785 - FA91S, FA150, FA180, FA180HC/BBC, FA200TI, FA300TTDP: All with CH Ignitions CDI/Glow fuel
    SIG BH #41
    - 1/3 Spacewalker, Rascal 110
    CUB BH #231 - Wings Maker 1/5 J-3 Cub


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