ORIGINAL: ngr1
It has a bunch of small holes in the top which I will plug with JB Weld. I was concerned about the material but I was able to successfully braze weld the top of the shaker so I will work on the stacks next which I plan to use copper tubing for.
Norman
Great, buy two and with carefull cutting they can be fitted together then use the tops for baffles.
Open about 3 or 4 of those small holes to about 3/16 in. and braze em inside the shakers spaced about in thirds of the length..course you'll have to grind or cut them down to a force fit to be able to get em inside the shaker muffler. Size the outlet to no more than the inlet size. If you need a bit of back pressure you may want to go just a bit smaller in dia. on the outlet stack.
If you hard fasten the shaker muffler to the engine then you will need to support the shaker muffler at a couple of places.. other-wise the weld or the stainless will crack from vibration.
Good Luck, My Stainless Shaker Muffler is working great on my Zenogh G-62 Powered Pitts S2-a
Have a gain of 150 rpm over the stock muffler, course I added a 2 in. carb intake tube also.
Let us know how it works out for you.