Cowl bumps with shielded ignition

[Patdevine]

Going to bite the bullet and put in slick magnetos on my BC12D. Eisemann are done and it’s too hard to get the parts/service.
Can anybody post some pics with cowl bumps? Particularly the fwd part by the nose cowl. Would like to see how it matches up on the front end.

[TimHicks]

I used to have fiberglass cowl bumps and a couple of years ago, I made new ones out of aluminum.
I documented my attempts here: https://vb.taylorcraft.org/forum/tay...-n-96872/page6
on page 5 and 6.
There are a few pictures of my installation that might be useful.

[Patdevine]

Saw the pics. Very helpful. I was especially interested to see how much nose cowl needed to get trimmed on left side. Doesn’t look too bad at all. Any experience/knowledge on the bumps Wag-Aero is selling?

[Patdevine]

Interested in making a couple more for a couple $$$...?

[Ray36048]

It has been posted if you use the BY plugs you do not need cowl bumps. These plugs are about 1/2 inch shorter.

[3Dreaming]

It has been posted if you use the BY plugs you do not need cowl bumps. These plugs are about 1/2 inch shorter.

While the BY plugs are shorter, they are not short enough to get away from the cowl bumps.

[Hank Jarrett]

Depends a lot on the plane and cowl. Taylorcrafts are not exactly all alike. Taylor wasn't building F-22s. Tolerances weren't that tight.

[Patdevine]

I’ve pretty much gotten used to the idea of cowl bumps. Not that big of a deal.
Now I just need to see if I can repair an old Eisemann mag. Got one good one bad. Any suggestions for parts or service?

[TimHicks]

I'm going to try to attach a photo of the port side cowl bump on the engine side. notice that the opening cuts through the edge of the top cowl. That's why I added the little "bridge" for strength.

[Patdevine]

Very cool. Thanks!

[Hank Jarrett]

Another GREAT example of how Taylorcrafts were ALL just a little different from each other! I have about half that much cut out in my LH side of the nose bowl on the 41.

[TimHicks]

Pat, if you need me to make a pair of aluminum cowl bumps using the tools that I used to make mine, I can do that for you. But I don't really want to get into production of these cowl bumps, nor to compete with Wag-Aero or ACS. If you've investigated what is commercially available and you're convinced that the ones that I can make are the right solution for your airplane, let me know.
Also note that I have the shorter (Tempest -BY) sparkplugs on the tops of my cylinders.

[astjp2]

Univair earcoupe bumps, installed them on several aircraft.

[Patdevine]

Thanks Tim, I appreciate the offer!! I think I’m good. Found a few options out there that should work fine. If I get jammed up I’ll let you know.

[Patdevine]

Saw the erocoupe bumps as well. Thanks