Pipe louver die

**Frank S** · Apr 22, 2022, 10:45 PM

In rebuilding a muffler for a John Deere loader I wanted to create louvers on the inlet pipe to do this I found the remains of a post driver I had made for my electric demolition hammer I turned it down enough to fit the ID of the exhaust pipe then torched a cavity into one side fore the louver to relieve in while keeping the pipe from being deformed

Pipe louver die-img_20220422_095306ld.jpg

Pipe louver die-img_20220422_100543ld.jpg

Pipe louver die-img_20220422_101246ld.jpg

Pipe louver die-img_20220422_115916ldsd.jpg

**DIYer** · Apr 23, 2022, 07:02 AM

Thanks Frank S! We've added your Pipe Louver Die to our Metalworking category,
as well as to your builder page: Frank S's Homemade Tools. Your receipt:

Pipe Louver Die by Frank S

tags: die

**metric_taper** · Apr 26, 2022, 05:50 PM

I was wondering what louver tool you made from your post yesterday making the muffler.

**Frank S** · Apr 26, 2022, 06:37 PM

Originally Posted by metric_taper

I was wondering what louver tool you made from your post yesterday making the muffler.

Many things I do require sometimes 2 or 3 or more tools to be made to complete the item I am making.

**Toolmaker51** · Apr 26, 2022, 11:34 PM

Originally Posted by Frank S

Many things I do require sometimes 2 or 3 or more tools to be made to complete the item I am making.

And start the indentations far end first?

**Frank S** · Apr 27, 2022, 12:18 AM

Originally Posted by Toolmaker51

And start the indentations far end first?

Yep, I thought about cutting 2 reliefs in the tool so I could have had a double row but as it turned out the single spiral row was enough to give it a good sound

**Saltfever** · May 3, 2022, 12:59 AM

I saw the other post Frank. Is exhaust flow around the outside of the louvered tube going inside and up the center or on the inside going out?

What is the HP of the JD and what is the diameter of your exhaust outlet?

**Frank S** · May 3, 2022, 07:00 AM

Originally Posted by Saltfever

I saw the other post Frank. Is exhaust flow around the outside of the louvered tube going inside and up the center or on the inside going out?

What is the HP of the JD and what is the diameter of your exhaust outlet?

The loader has 180 HP 43,000 lbs open ROPS. The exhaust is 4 inches the muffler the way I rebuilt it the 4inch inlet tube is 30 inches long with 22 inches of that being inside the 7 inch diameter muffler shell. The 18 louvered indentions are spaced about 1 inch apart in a spiraling pattern, diverting approximately 35 to 40% of the exhaust flow to the muffler cavity the rest of the flow continues straight through the diverted gases re enter the flow through the relief cut outs in the centering support disk at the end of the inlet tube. The reduced velocity of the expanded gases coupled with the turbulent motion created by the spiraled pattern of the louvers reduces the exhaust noise by I would guess about 60% over that of not having any muffler at all. Over all I am very satisfied with the outcome as it is as near to the sound level of a factory new muffler would be