Project Muffalotta!

markus

markus

Well-Known Member
#1
#1
Got lots of money tied up into this project, still trying to get my jig to get the holes centered better but I am almost there with a near, if not exact, match 7 hole Tecumseh muffler. In my hand is my first completed one. Couple more tweaks and I will be happier but its gettin’ there!!! IMG_4253.jpeg

I ran the prototype on this 1962 ht35b I internally rebuilt for someone off a Polaris trail tractor bike. Sounded pretty good!!
 
Harquebus

Harquebus

Well-Known Member
#5
#5
Maybe I should know the answer already, but what is the internal construction of this particular style of muffler?
By that I mean the baffles, if any.
 
S

SAT

#6
#6
markus said:
Got lots of money tied up into this project, still trying to get my jig to get the holes centered better but I am almost there with a near, if not exact, match 7 hole Tecumseh muffler. In my hand is my first completed one. Couple more tweaks and I will be happier but its gettin’ there!!! View attachment 304325

I ran the prototype on this 1962 ht35b I internally rebuilt for someone off a Polaris trail tractor bike. Sounded pretty good!!
Click to expand...
If you had access to a mill and a rotary indexer, you could make a drill guide. Shape it like a cup, slip it over the miffler housing, fasten the muffler/guide in a pipe thread fixture. Drill the perfectly spaced holes with a step drill. Remove and de-burr.
Or are you thinking to stamping them from the inside prior to assembly?
Great project.
 
markus

markus

Well-Known Member
#7
#7
I got the stuff I needed to get done over at the military shop buttoned up sooner than I thought today, and since I had the bay open for the afternoon I figured I would get a couple of these done for some upcoming restos while I had the time.

But before I get to that here’s what I came up with earlier in the year as a fixture to repeatably drill the holes.
I had the kooky idea to make a mold so I used a mixing cup, some pieces of dowel, some fiberglass……and a condom :D I always keep some around……..For muff work ;)

IMG_5078.jpeg IMG_5079.jpeg IMG_5080.jpeg


It’s working pretty good. after getting the needed welding done I just slip it on and drill some holes.



IMG_5565.jpeg IMG_5566.jpeg IMG_5567.jpeg IMG_5568.jpeg IMG_5569.jpeg IMG_5570.jpeg
 
Last edited:
M

mchadsey1

Well-Known Member
#8
#8
markus said:
I got the stuff I needed to get done over at the military shop buttoned up sooner than I thought and since I had the bay open for the afternoon I figured I would get a couple of these done for some upcoming restos while I had the time.

But before I get to that here’s what I came up with earlier in the year as a fixture to repeatably drill the holes
the kooky idea to make mold so I used a mixing cup some pieces of dowel
some fiberglass……and a condom :D

I always keep some around:p

View attachment 316568 View attachment 316569 View attachment 316570


It’s working pretty good after getting the needed welding done I just slip it on and drill some holes.



View attachment 316574 View attachment 316575 View attachment 316576 View attachment 316577 View attachment 316578 View attachment 316579
Click to expand...
great job when can we buy them?
 
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