Backcountry Pilot • New life for the 170/172 IO-360 Conversion

New life for the 170/172 IO-360 Conversion

Lycoming, Continental, Hartzell, McCauley, or any broad spectrum drive system component used on multiple type.
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New life for the 170/172 IO-360 Conversion

This is just what my 170B needs!

CONTINENTAL 210 HP IO360 Engine Conversion

Does the Cessna 170 series need a bigger engine? To understand Tom's thinking, read his personal account:

"In 1977 I was taking off from a semi-short pasture runway in Eastern Washington for a return flight to Seattle. I was a little heavy but not over gross. The field was soft so I got a bad initial roll in my take off run. About half way down the runway the head wind I had died out. I had committed myself to take off. My tires HIT and rolled over the top wires on a barbed wire fence at the end of the runway!
After that, I told myself that I was going to sell the plane. But I did not want to. I loved my 170. It was the plane I learned to fly in. It had everything I wanted - except POWER.

When I looked into another engine conversion, the only thing available was that shaky four cylinder Lycoming or a Franklin. I decided that the Hawk XP engine would be great in the 170, and the rest is history."

A New Heart for the 170/172 thru H 175, & P172D
Do you like your small Cessna enough to give it a new heart?
That is why Tom Anderson did the original STC. It was the love of safety, good visibility over the nose, the light weight, and the smooth 6 cylinder engine that inspired him. Another plane with the performance that you want could cost well over $100,000 and it would not be the familiar plane you love. People might say, “why do that to your small Cessna? Just buy a larger 180 or 185”. Still, you would not have the great handling and look of
the CLASSIC aircraft.

Engine Options:
CONTINENTAL IO360 A, C, D, G, H, J, AB, DB, GB, HB, & JB

Specs: IO360
210hp climb - 1275-1400 fpm SL @ gross. 2200 FPM light. Cruise @ 2550/25.5" 130mph Hi cruise @ 2650 / 26.5" 145mph Fuel consumption/ cruise 8.4 / GPH " " hi cruise 10.8 / GPH

The 210 hp Continental Engine is SMOOTH, SAFE, and RELIABLE. There is no icing in this engine because it is fuel injected; and the intake is above the cylinders.

Propeller Options:
Of all the conversions on the market our 210 conversion is the best. With the constant-speed prop or the fixed-pitch.

C170
McCauley Constant Speed Propeller:
a) 2A34C203-90 DCA-10
b) 2A34C209 hub with 78CCA blades
c) 2A3467-76C
McCauley Fixed Pitch Propeller:
a) 1B235/DFC

C172 - 175
McCauley Constant Speed Propeller:
a) 2A34C203-90 DCA-14
b) 2A34C209 hub with 78CCA blades
c) 2A34C67-76C
McCauley Fixed Speed Propeller:
a) 1B235/DCF

http://www.thelandinggearworks.com/power-plant-conversion/
robw56 offline
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Re: New life for the 170/172 IO-360 Conversion

That would be awesome! Enough money to make it happen?
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Re: New life for the 170/172 IO-360 Conversion

This conversion has been around for quite some time. Tom had his 172 and 170 here in wenatchee when his company was called xp mods, about 10 years ago. I helped him do some work on the 170. I believe it took him a long time to get the approval from the FAA but it seemed like a fine STC. My question would be what is the weight difference? I'm already heavy on the nose. The good thing is the continental 360 is smooth as glass and far cheaper than the lycoming.
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Re: New life for the 170/172 IO-360 Conversion

I know it's been around for a while but always heard it was kind of a dead STC and you couldn't find the motor mount anywhere. From what I heard he has a jig and will build new motor mounts. There is a guy on the 170 site doing the conversion now.
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Re: New life for the 170/172 IO-360 Conversion

Hey rob, can you link that thread, I cant seem to find it
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Re: New life for the 170/172 IO-360 Conversion

daedaluscan offline
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Re: New life for the 170/172 IO-360 Conversion

I have a legally "tuned" (ported, polished, balanced, so that it puts out as much power as it can and still meet certification specs) O-360 Lycoming 180hp Avcon conversion in my P172D, and the biggest beef I've had with it (other than that the back 2 cylinders tend to run hot) is that Avcon has the world's worst customer service. Fortunately they used pretty much standard off the shelf parts. But it's admittedly not as smooth as a 6 cylinder.

I would think there's a ready market for a 210hp conversion, not just among us high country folk, and I'd bet that the weight difference is close to nil.

Cary
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Re: New life for the 170/172 IO-360 Conversion

I was talking to a guy a few weeks ago that had his O-320 overhauled recently in a 172. He said LyCon did the overhaul and with all their special sauce it dyno'd at 190HP which I thought was pretty incredible.
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Re: New life for the 170/172 IO-360 Conversion

I'm curious if there is an STC for an MT prop with the IO-360. That would be one way to lighten the weight of the conversion... And even more weight from the wallet #-o
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Re: New life for the 170/172 IO-360 Conversion

scottf wrote:I was talking to a guy a few weeks ago that had his O-320 overhauled recently in a 172. He said LyCon did the overhaul and with all their special sauce it dyno'd at 190HP which I thought was pretty incredible.


That's pretty good out of a certified O-320!
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Re: New life for the 170/172 IO-360 Conversion

robw56 wrote:I'm curious if there is an STC for an MT prop with the IO-360. That would be one way to lighten the weight of the conversion... And even more weight from the wallet #-o


No STC that I am aware of. The MT prop would complement this conversion nicely. That would be something like 20 pounds (IIRC) off the heavy end. Then I could get rid of the lead block in the tail, an added bonus.

This is a sweet conversion. I did mine 14 years ago. It does all the good things that an extra 50 horsepower should do, with very little downside. I have about 1000 hours on it, no regrets.

It would be good to see more of these.

Pete
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Re: New life for the 170/172 IO-360 Conversion

Hey Pete, good to hear from you. I haven't seen you on here in a while. I'm curious how much weight you added over the C-145/0-300 when you did the conversion.
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Re: New life for the 170/172 IO-360 Conversion

as for the prop......... I have the 76 inch prop on my M4 IO 360 and have learned that the 80 inch prop is worlds better in performance.. so if you are in a quandary over which one go for the 80 inch..... been saving my pennies for a new McCauley 80 inch prop....that would be the 203 90-10 the 10 being inches subtracted from 90......I have the 209 78-2 makng mine 76 inches.....
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