Super Eagle Engine Conversion

Continental O-470-50

The Super Eagle Engine conversion is designed for Cessna 180 and 182 models currently equipped with Continental 470k through U engines.

It is basically a carbureted Continental O-520.  We call it the “Dash Fifty” for short. The Super Eagle conversion utilizes your existing engine mount, baffling, exhaust and cowling.  No airframe modifications are required.  Total additional weight of the engine is approximately +4 pounds.

To create the Dash Fifty (-50), we modify eligible stock Continental O-470 and 520 models.  Although these engines require different modifications, the end result is the same….…the Super Eagle O-470-50.  It will dramatically increase the performance of your aircraft by improving thrust, and giving you the capability of higher cruise speeds with little if any increase in fuel consumption.  Being a carbureted engine, there is virtually no change in operation or maintenance procedure.

With the Super Eagle Engine, you can reach your destination sooner which means fewer hours on both your engine and airframe. Flight tests have produced speeds up to 189 MPH using aircraft that do not have any airframe speed modifications installed.

The Super Eagle Engine was tested on a dynamometer to determine two horsepower (HP) ratings:

Free HP: Total horsepower (HP) without any accessories installed.
Installed HP Total horsepower (HP) after accessories are installed.

Free HP O-470: 230  
Free HP Super Eagle: 265 (275 if cylinders are equipped with venturi seats)
Installed HP O-470: 195 to 200
Installed HP Super Eagle: 235
Super Eagle Recommended TBO: 1700 Hrs with an oil screen
2000 Hrs with an oil filter installed since major overhaul

Engine / Aircraft Performance Comparison

MP RPM Altitude OAT C Stock 0-470 Super Eagle
24 2450 4000 22 N/A 158ktas / 182mpht
23.5 2600 4000 24 N/A 164ktas / 189mpht
23 2400 4000 22 142ktas / 163mpht 154ktas / 178mpht
22 2400 6000 19 142ktas / 163mpht 155ktas / 178mpht
22 2500 6000 19 145ktas / 167mpht 158ktas / 182mpht
21 2300 8000 15 138ktas / 159mpht 152ktas / 175mpht

Continental O-470 engines may be modified only at P. Ponk Aviation or at a facility we have authorized.
To convert a stock Continental 0-470 engine to the Super Eagle requires several internal changes, but the first and most obvious is to exchange the O-470 cylinders for O-520 cylinders which increase the engine displacement by 50 cubic inches. Super Eagle Engines are equipped with 4-counterweighted crankshafts. (Most O-470-R and S models will require a crankshaft change.) The crankshaft counterweights are reconfigured and the case is modified. The cylinders are equipped with 7.5 to 1 compression pistons which are precision balanced to within .5 grams. The carburetor is also modified. The original external accessories are serviced as needed or upgraded as desired, and installed.

Piston Comparison:

  • Stock O-470: 7 to 1 compression pistons
  • Super Eagle O-470-50: 7.5 to 1 compression pistons
  • Stock TSIO-520: 8.5 to 1 compression pistons

Continental 520 engines may be converted by one of our authorized facilities, or at the facility of your choice, subject to authorization and purchase of STC paperwork, currently $1550. The TSIO-520-C, H, R, M, P, T or IO-520-D or F engine blocks may be converted. Conversion of eligible TSIO-520 models to the Super Eagle Engine requires mostly external modifications. Most noticeably is the removal of the turbo charger and fuel injection system, and installation of a modified carburetor. Cylinders are equipped with 7.5 to 1 compression pistons, precision balanced to within .5 grams. The oil pan is exchanged for the original oil pan installed on the Cessna 180 or 182.

Carburetor Modification

Modification of an eligible MA4-5 carburetor is required for use with the O-470-50 engine. Overhaul of the carburetor at the time of modification is recommended unless it has been recently overhauled, or is in excellent condition. Eligible MA4-5 Part Numbers are: 10-3965-12-1, 10-4893-1, 10-5192 or 10-5284. With authorization from P Ponk, the carburetor modification (and overhaul as well) may be accomplished by AvStar Fuel Systems in Florida, Professional Aircraft Accessories in Ohio, or LyCon Rebuilding in California.

Whether converting a Continental 470 or 520 to the Super Eagle Engine, the end product is essentially the same – a carbureted Continental O-520 which rated 265-275 HP.

A precision balanced engine offers several advantages, including significantly improved performance, smoother operation, less maintenance, and a longer TBO. A smooth running engine also reduces pilot fatigue and increases passenger comfort.

Engine prices are not addressed here as we do not control pricing or warranty of the shops we have authorized to perform the engine conversion. There are many parts and accessory options available including choice of cylinders that affect pricing, so please contact us or one of our authorized engine builders to discuss your specific needs.

Approximate PPA O-470-50 Engine Power Settings

Normal lean mixture at approximately 2500 feet

Full Manifold Pressure 27 to 28" + 2700 RPM = 100% power
Full Manifold Pressure 24" + 2400 RPM = 75% power
Full Manifold Pressure 23" + 2300 RPM = 65% power
Full Manifold Pressure 22" + 2200 RPM = 56% power

Approximate Fuel Consumption

Approved for 100 octane fuel.

  • 11.5 gal per hour at 2150 squared
  • 16 to 17 gal per hour at 2500 to 2600 squared.

-50 engine provides better fuel economy than the standard O-470 at the same power settings:

  • O-470 engine 10 miles per gallon
  • -50 engine 11 miles per gallon

Propellers for the Super Eagle O-470-50 Engine

Best all-around performance of the O-470-50 engine is attained with installation of a 3-blade propeller. Hartzell, McCauley and MT offer excellent products with similar performance figures, but they have different flight characteristics. It is best to match the propeller with the kind of flying you intend to do.

The McCauley offers a little more thrust and acts somewhat like a speed brake when setting up for landing. (Very helpful in and out of short strips with heavy loads.) The Hartzell is a little faster, and also a quieter prop if you are operating in noise sensitive areas. The MT is a lighter weight option.

Following are 2016 prices for factory new 3-blade propeller and spinner “kits”, including STC for installation:

  • Hartzell $10,355 to $12,113 (depending upon propeller length)
  • McCauley $11,040 to $11,280 (depending upon spinner option)
  • MT $14,950

Shipping from the factory is additional.

Please Note:

P Ponk STC for -50 engine installation includes installation of approved McCauley propellers.

P Ponk STC for installation of approved Hartzell propellers is separate, and is included with purchase of a Hartzell propeller from P Ponk Aviation.

An MT Prop option and STC for installation with the -50 engine is available through Flight Resources.

P Ponk -50 STC’s for Cessna 182:

  • Modification of O-470K, L, M, R, S and U to PPA O-470-50.
  • Modification of TSIO-520-C engine to PPA O-470-50.
    (TSIO-520H, R, M, P, T or IO-520-D or F engine blocks may also be used.)
  • Installation of –50 engine in all Cessna 182, and 182A through R Models.
  • Installation of the following propellers:
    • McCauley D2A34C58/90AT-8 (2 blade)
    • McCauley 2A34C66/90AT-8 (2 blade)
    • McCauley D2A37C230/90REB-8 (2 blade)
    • McCauley D3A32C90/82NC-2 (3 blade)
    • McCauley D3A34C401/90DFA-10 (80” | 3 blade | Cessna 182 H through R)
    • McCauley D3A34C401/90DFA-8 (82” | 3 blade | Cessna 182 through G)
    • Hartzell PHC-C/G3YF-1RF/8068 (82” | 3-blade | C/G = C or G Hub)
    • Hartzell PHC-C/G3YF-1RF/8068+2 (84” | 3-blade | C/G = C or G Hub Seaplane Only or Landplane with approved nose fork and larger tires.

P Ponk -50 STC’s for Cessna 180:

  • Modification of O-470K, L, M, R, S and U to PPA O-470-50.
  • Modification of TSIO-520-C engine to PPA O-470-50.
    (TSIO-520H, R, M, P, T or IO-520-D or F engine blocks may also be used.)
  • Installation of –50 engine in all Cessna 180 and 180A through 180K Models.
  • Installation of the following propellers:
    • McCauley D3A34C401/90DFA-4 to –12 78” to 86” 3-blade
    • Hartzell PHC-C/G3YF-1RF/8068 (82”) or 8086+2 (84”) 3-blade (C/G = C or G Hub)

Authorized Engine Builders

Contact any of the qualified builders below to modify your Continental engine into a Super Eagle O-470-50.

Aero Engines of Winchester, Inc.

Tom Schwietz
615 Airport Road #109
Winchester, VA 22602
Voice: (540) 678-1661
Fax: (540) 678-1661

America’s Aircraft Engines Inc.

Stephen Fowler
2505 West Broadway
Collinsville OK 74021
918 371-3000

Avian Aeronautics, Inc.

Pat Heseltine
8900 State Highway 3 SW Suite 102
Port Orchard, WA 98367
Voice: (360) 674-2244
Fax: (360) 674-2551

Corona Aircraft Engine Inc.

Ben Ocon
1965 Aviation Dr #A
Corona, CA 92880
Voice (951) 736-6452
Fax (951) 736-6801

Custom Aircraft Inc.

Richard Walker
821 E. Aircraft Road
Palmer, AK 99645
Voice (907) 745-6030
Fax (907) 745-6032

Lawson Aviation, LLC

Matt Lawson
18021 38th Street
Gobles MI 49055
Voice & Fax: 269 521-6214

Lycon, Inc.

Les Switzer & Dean Altman
5117 E. Roadrunner Dr.
Mesa, AZ 85215
Voice: (480) 981-0876
Fax: (480) 654-2820

Ly-Con Rebuilding Company

Ken Tunnell & Loren Lemen
8231 West Doe Avenue
Visalia CA 93291
Voice: (559) 651-1070
Fax: (559) 651-3212

One Stop Aviation, Inc.

Rick Snover
1119 S. Cleveland Street
Oceanside CA 92054
Voice: (760) 721-1389
Fax: (760) 721-1399

Premier Aircraft Engines

Jim DesJardins
1000 NW Perimeter Way
Troutdale OR 97060
Voice: 503 661-4184
Fax: 503 667-4052

Tim’s Aircraft Engines Inc.

Tim Maher
6105 Obispo Avenue
Long Beach, CA 90805
Voice: (562) 634-6120
Fax: (562) 634-6129

Zephyr Aircraft Engines Inc.

Charles Melot
39320 B Avenue
Zephyrhills FL 33542
Voice: (813) 788-3305
Fax: (813) 778-4412

Dalby Air Maintenance

Glen Shaw
Hangar 4 Aerodrome Road
Dalby Aerodrome
Dalby 4405 QLD Australia
Voice: 011 617 4662 2063
Fax: 011 617 4662 3628

Aero Atelier

Manuel Mongrain
1281 Tour du Lac Avenue
PO Box 117
Lac a la Tortue, Quebec G0X 1L0
Voice: 819 538-6768
Fax: 819 538-6710

Pro Aero Aviation LTD.

Darren Wilkinson & Brad Ford
2965 Airport Road
Kamloops, BC Canada V2B 7W8
Voice: (800) 264-6019
Fax: (250) 376-1995

Aviation Power Supply Ltd.

Gary Blithe
Site 36 Kittyhawk Lane
Ardmore Airfield 2022
Papakura, New Zealand
Voice: 011 64 9 299 7800
Fax: 011 64 9 298 0880