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Thread: O-320-E2D in a Piper PA-18

  1. #1

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    O-320-E2D in a Piper PA-18

    Hi guys

    Asking for a friend who is not on the forum.

    I fly an experimental Cub so Iím unsure it itís possible to install an O-320-E2D in a Piper PA-18. He bought a PA-18-135 project without engine and prop and wish to upgrade to 150/160hp. He has access to a freshly overhauled E2D engine.

    Since the PA-18ís were originally built with the O-320-A2B engines, is the STC upgrading to the 150/160hp only applicable to the A2Bís or will he be able to legally install the E2D?

    Thanks

  2. #2
    Charlie Longley's Avatar
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    Dynafocal mount right? Probably out of a 172. I am not sure if there’s an STC. He’ll have to change the motor mount if so.

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    Steve Pierce's Avatar
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    Ditto what Charlie posted. Look at the Type Certificate Data Sheet for the O-320 and it gives all the differences. Usually use -A or -B conical mount engines but Cub Crafters STC allows for the dynafocal mount style and Wag Aero has the mount.
    Steve Pierce

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  4. #4
    Charlie Longley's Avatar
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    Here’s an excellent thread on the subject- https://www.supercub.org/forum/showt...-problem-Help!

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    Thanks for the reply guys. This then leads me to another question - The mentioned E2D is a Conical mount which means it has been modified from Dynafocal some time. Is this legal? Is there a STC which allows you to do this modification?
    If allowed, can this engine be installed per STC onto a PA18? Iow can any conical designated O-320 engine be installed or must it be the A2B?

    Thanks

  6. #6
    Charlie Longley's Avatar
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    Quote Originally Posted by Lampies View Post
    Thanks for the reply guys. This then leads me to another question - The mentioned E2D is a Conical mount which means it has been modified from Dynafocal some time. Is this legal? Is there a STC which allows you to do this modification?
    If allowed, can this engine be installed per STC onto a PA18? Iow can any conical designated O-320 engine be installed or must it be the A2B?

    Thanks
    I doubt it. But I am curious how it was modified. It would take a different case which I suppose is possible since the data plate is on the sump.

  7. #7
    brown bear's Avatar
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    But I am curious how it was modified
    DivCo told me they can do it , but if I remember right good for experimental use only

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    I’m also curious how they’ve managed to pull this off. The engine is definitely certified as per the data tag, and was rebuilt by a certified engine shop. We know who the engine shop is so I think it’s best to start there and ask them how and when...
    Likes skywagon8a liked this post

  9. #9
    Steve Pierce's Avatar
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    Is there a C stamped on the data tag?
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

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    Forget the E2D for certificated 18.E2D has a solid crank,larger sump so needs the O360 type mount if it has the original sump, E2D prop flange has larger bolt studs , and I'm thinking E2D carb Centerline is different. Lots of homework .
    For experimental with 9:1s ,heck of a power plant
    Last edited by Fortysix12; 01-12-2020 at 07:18 AM.

  11. #11
    Steve Pierce's Avatar
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    Quote Originally Posted by Fortysix12 View Post
    Forget the E2D for certificated 18.E2D has a solid crank,larger sump so needs the O360 type mount if it has the original sump, E2D prop flange has larger bolt studs , and I'm thinking E2D carb Centerline is different. Lots of homework .
    For experimental with 9:1s ,heck of a power plant
    I seem to remember you asking that same question many years ago here.
    Steve Pierce

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    Will Rogers

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    You are right on Steve! and I went with the recommendation of a fellow member from Alaska. Great power, runs a little warm but I also run 2500 and up. A great motor for the experimental. The larger intake on the plenum makes a huge difference along with the HC pistons. The electronic mag is also a nice addition. One major drawback is the solid crank and no Gov.

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    Quote Originally Posted by Steve Pierce View Post
    Is there a C stamped on the data tag?
    Affirm. There is after the S/N

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