O-320-E2D in a Piper PA-18

[Lampies]

Hi guys

Asking for a friend who is not on the forum.

I fly an experimental Cub so I’m unsure it it’s 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-18’s were originally built with the O-320-A2B engines, is the STC upgrading to the 150/160hp only applicable to the A2B’s or will he be able to legally install the E2D?

Thanks

 

[Charlie Longley]

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.

 

[Steve Pierce]

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.

 

[Charlie Longley]

Here’s an excellent thread on the subject- https://www.supercub.org/forum/showthread.php?32403-160-HP-Paperwork-problem-Help!

 

[Lampies]

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

 

[Charlie Longley]

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.

 

[brown bear]

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

 

[Lampies]

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...

 

[Steve Pierce]

Is there a C stamped on the data tag?

 

[Fortysix12]

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

 

[Steve Pierce]

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. 8)

 

[Fortysix12]

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.

 

[Lampies]

Is there a C stamped on the data tag?

Affirm. There is after the S/N

 

[Fortysix12]

https://www.lycoming.com/sites/default/files/Engine Nameplate Replacement.pdf