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Thread: O-320 STC for a PA-18-105

  1. #1

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    O-320 STC for a PA-18-105

    Is there an STC for the Lycoming O-320 for the early model Super Cubs? Specifically the PA-18-105? I did a little searching around and haven't seen one.

    Thanks,

    Dan

  2. #2
    mvivion's Avatar
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    Contact Univair.

    MTV

  3. #3

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    I thought it was all in the type cert? I'll go look.

    Ok - I see it. You have to convert to a model 150 first, so better to go STC. Might ask Robbie Grove - his is stock, except for brakes and engine (150).

    If you do hang an O-320, make sure you can go 160 hp.

    Finally - you do know you are converting an aircraft that will do 90 mph on 6 gph to one that may do 100 mph on ten? The 160 makes that look a lot better.
    Last edited by bob turner; 03-12-2019 at 07:00 PM.
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  4. #4

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    Thanks, I'm not looking for more speed, but more climb and someday floats. I wasn't looking at the right one on the Univar site, but now I found it.

  5. #5
    Steve Pierce's Avatar
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    Google this and you will find everything you ever wanted to know and more.
    stc O-320 site:supercub.org
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers
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  6. #6

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    Thanks, I have flaps and Cleveland brakes, so it looks like I’m part way there.

  7. #7
    cruiser's Avatar
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    Roger Borer STC SA136AL being sold by his daughter Karen Braley, I think. A call to Atlee Dodge will get you her contact number.

  8. #8

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    Our Super Cub (1950, K series) originally had the flaps, no electric, and single wing tank with an O-235 that I am told was rated at 108 hp on PK 1800 floats. Before I was born, my Dad and Grandfather converted it to O-320 and added 2nd wing tank. My Dad tells me that as long as it was not heavily loaded it got off the water and landed shorter in its original, very light configuration than it does with the O-320. Said it was an absolute blast to fly. The main difference is that you can carry a heavier load with the O-320 and the extra tank gives you more range.
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  9. #9

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    Hey Dan,
    These guys have one.
    http://svennsaviation.com
    Sawyer

  10. #10

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    Thanks for all the info, everyone. I'm about ready to pull the trigger on a more or less stock Super Cub to buy and through this site I've figured out what my options for upgrades are.
    Dan
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