O-360 & IO-360 Series Model Specification Summary 621 South Royal Lane, Suite 100 / Coppell, TX 75019 / 800-277-5168 www.superior-air-parts.com
Technical Data Summary Design Highlights O-360 IO-360 Rating 180 BHp @ 2700 RPM General Description: Induction Style Updraft Updraft Carbureted Port Fuel Injection Induction Type Naturally Aspirated Design Layout 4 cylinder Horizontally Opposed Bore x Stroke 5.125 in x 4.375 in Displacement 361 in 3 Compression Ratio 8.5 : 1 Mounting Options Dynafocal (Type 1 or Type 2), Conical Dimensions (L x W x H) 32.8 x 33.4 x 24.6 (in) 32.8 x 33.4 x 24.0 (in) Weight 288 to 291 Lb * 290 to 293 Lb * Oil System: Capacity 8 Qt. Maximum / 2.5 Qt. Minimum Filtration Full Flow Filter Provided Propeller: Type Fixed-Pitch or Constant Speed Drive Direct Rotation Right (Clockwise) from Rear of Engine Minimum Fuel Grade: Avgas 91/98 (Lead Optional) Motor Gasoline 91 Octane (R+M/2) No Alcohol Ignition: Type Dual Impulse Magnetos Timing R: 25 BTDC, L: 25 BTDC Firing Order 1-3-2-4 *Approximate dry weight actual weight varies by model Page 1 of 13
Technical Data Summary Model Designations Fuel System Type O IO Denotes a Carbureted System and Opposed Cylinder Arrangement Denotes Port Fuel Injection System and Opposed Cylinder Arrangement Cylinder Type 360 Parallel Valve Style Cylinder, 361 in 3 Displacement 1 st Digit Crankshaft A Fixed-Pitch, Thin-Wall Front Main & Propeller Type B Constant-Speed, Thin-Wall Front Main Model Suffix Digits 2 nd Digit 3 rd Digit Crankcase & Engine Mount Type Accessory Package 1 Type 1 Dynafocal Style Isolation Mount 2 Type 2 Dynafocal Style Isolation Mount 3 Conical Style Isolation Mount A Unison Magnetos Precision Carburetor or Fuel Injection * 4 th Digit Power Rating 1 2 Reserved for Future Use 8.5 : 1 Compression Ratio Reserved for Future Use 180 BHp Rated Power * As appropriate to Fuel System Type Page 2 of 13
Technical Data Summary Performance Highlights Units O-360 IO-360 Max Continuous Power BHp 180 Max Recommended Cruise BHp 144 (80% Max Continuous Power) Best Fuel Consumption: - 80% Max Power GPH - 70% Max Power GPH - 60% Max Power GPH Best BSFC: - 80% Max Power Lb/Hp-hr - 70% Max Power Lb/Hp-hr - 60% Max Power Lb/Hp-hr 10.5 (Peak EGT) 11.7 (Best Power) 8.9 (Peak EGT) 9.9 (Best Power) 8.1 (Peak EGT) 8.9 (Best Power) 0.43 (Peak EGT) 0.48 (Best Power) 0.41 (Peak EGT) 0.46 (Best Power) 0.44 (Peak EGT) 0.48 (Best Power) Page 3 of 13
Technical Data Summary Operational Limits Units O-360 IO-360 Max Continuous Speed RPM 2700 Max Continuous Manifold Pressure In-Hg 29.5 Cylinder Head Temperature: Maximum F 500 Maximum Recommended F 430 Oil: Maximum Temperature (at engine inlet) F 240 Minimum Pressure (at idle) psig 20 Minimum Pressure (normal) psig 55 Maximum Pressure (normal) psig 95 Maximum Pressure (cold) psig 115 Fuel: Minimum Pressure (inlet to pump) psig +0.5-2.0 Maximum Pressure (inlet to pump) psig +8.0 +35.0 Page 4 of 13
Technical Data Summary Accessories Starter Supplied SkyTec 149-12LS (Lightweight Style) Fuel Pump Supplied Aero Accessories AF15472 Carburetor Fuel Injector Supplied (As Appropriate) Supplied (As Appropriate) Precision MA-4-5 Precision RSA-5 type Magneto (both) Supplied Unison 4371 (Lightweight Style) Harness (both) Supplied Unison M4001 Alternator Propeller Governor Accessory Drive Not-Supplied Not-Supplied Supplied Mounting Holes and Standard SAE Size 0.38 Drive Pulley Provided AND20010 Drive Pad Adapter Supplied with Cover AND20000 Drive Pad Supplied with Cover (Suitable for standard vacuum pump, alternator or hydraulic accessory) Tachometer Drive Supplied Standard Drive Socket Supplied Page 5 of 13
Technical Data Summary O-360 Overall Dimensions Page 6 of 13
Technical Data Summary IO-360 Overall Dimensions Page 7 of 13
Performance Summary Pressure Altitude (Ft x 1000) -50 F 25 20 15 10 5 0 Std Alt Temp 0 F +50 F 2200 Altitude Performance Superior Vantage O/IO-360 Series Best Power Altitude Performance 2400 2700 20 Example: Flying at 25.1" MP, 2400 RPM, 2200 ft and at 75 F outside air temp the engine should produce 139 Hp on a standard day (HPs). However, the inlet air is 25 F higher than standard day (75 F vs. 50 F), so we must correct for this by multiplying HPs by the square root of the temperature ratio (adjusting for absolute, or Rankine, temperature). Thus, 139x [(460+50)/(460+75)]^0.5 = 135.7 HP actual. 22 24 26 28 Absolute Dry Manifold Pressure (In-Hg) 30 29 28 Sea Level Performance Limiting manifold pressure for 27 continuous operation 26 2700 25 2600 24 2500 23 2400 2300 22 2200 21 20 19 18 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Power (Hp) Page 8 of 13
Performance Summary 30 29 2200 2300 Cruise Performance Superior Vantage O/IO-360 Series 80% Power (144 Hp) - Rich of Peak Operation No Operation with Motor Gasoline Above 430 F CHT Absolute Dry Manifold Pressure (In-Hg) 28 27 26 No Operation with Motor Gasoline Above 500 F CHT Peak EGT 2400 2500 Best Power 2600 Full Rich 25 2700 24 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 Fuel Flow (Lb/Hr) Page 9 of 13
Performance Summary 30 Cruise Performance Superior Vantage O/IO-360 Series 70% Power (126 Hp) - Rich of Peak Operation 29 2000 Absolute Dry Manifold Pressure (In-Hg) 28 27 26 25 24 23 Peak EGT 2100 2200 2300 2400 Best Power 2500 2600 2700 Full Rich 22 21 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 Fuel Flow (Lb/Hr) Page 10 of 13
Performance Summary 28 Cruise Performance Superior Vantage O/IO-360 Series 60% Power (108 Hp) - Rich of Peak Operation 27 Absolute Dry Manifold Pressure (In-Hg) 26 25 24 23 22 21 Peak EGT 2000 2100 2200 2300 Best Power 2400 2500 2600 2700 Full Rich 20 19 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 Fuel Flow (Lb/Hr) Page 11 of 13
Performance Summary 0 Performance Cruise Fuel Mixture Curve Superior Vantage O-360 Series 26 in-hg x 2400 RPM -50-100 -150 Below Peak EGT ( F) -200 0 49.3 51.3 53.3 55.3 57.3 59.3 61.3 63.3 65.3 67.3 69.3 71.3 73.3 75.3 77.3 79.3 81.3-25 Below Peak CHT ( F) -50-75 140 130 120 110 100 90 80 0.70 0.65 0.60 0.55 0.50 0.45 0.40 49.3 51.3 53.3 55.3 57.3 59.3 61.3 63.3 65.3 67.3 69.3 71.3 73.3 75.3 77.3 79.3 81.3 49.3 51.3 53.3 55.3 57.3 59.3 61.3 63.3 65.3 67.3 69.3 71.3 73.3 75.3 77.3 79.3 81.3 BSFC (Lb/Hp-hr) Corrected Power (Hp) 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 Fuel Flow (Lbs/hr) Page 12 of 13
Performance Summary 0-50 Performance Cruise Fuel Mixture Curve Superior Vantage IO-360 Series 26 in-hg x 2400 RPM -100-150 Below Peak EGT ( F) -200 0-25 -50 Below Peak CHT ( F) -75 140 130 120 110 100 90 80 Corrected Power (Hp) 0.70 0.65 0.60 BSFC (Lb/Hp-hr) 0.55 0.50 0.45 0.40 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 Fuel Flow (Lb/Hr) Page 13 of 13