Punching Holes into Pipe - Pirate4x4.Com : 4x4 and Off-Road Forum

res0zvle@charter.net · 08-04-2004, 10:30 AM

I'm attempting to make an exhaust baffle. I need to punch many square pencil-sized holes into one inch pipe. The holes cannot be drilled as the punched inner notches act to retrict exhaust flow. Anyone have any ideas as to what I can use to make the punches?

Thanks!

Old Scout · 08-04-2004, 11:21 AM

Why not drill and just clean up with a die grinder?

res0zvle@charter.net · 08-04-2004, 01:45 PM

Oldscout

The punch creates a notch in the inner part of the pipe. These notches act to further baffle the exhaust & create the sound I am looking for.

Thanks
Jim

Quote:

Originally Posted by Old Scout

Why not drill and just clean up with a die grinder?

fj40guy · 08-04-2004, 02:08 PM

Hammer driven nailer! (Type that is loaded with the 22 explosives).

On a more serious note... all I can think of is a "four sided" punch. Top of it looks like a praymid. What a pain, punch... hammer... wiggle punch out... punch... hammer... I'd go nuts (and spend $60 for a decent muffler).

What about taking a FLAT SHEET OF METAL? Punch over a piece of wood. Once done, roll the sheet and weld the seam. It would go quicker, thinner sheet metal could be used for the punch operation (easier to do).

Why are you making your own muffler? (Oh, I did have a sports car that could only use mufflers 9" long (it fit between the "X" in a frame... pain in the rear to find a muffler that size with any flow). Discovered the easiest way to quiet the exhaust down was to bolt on a turbo with a 18" straight pipe (noise wasn't bad at all!)

Tom

res0zvle@charter.net · 08-06-2004, 12:36 PM

fj40juy

Thanks, some good ideas - even the one about the nailer - maybe using it as an impact punch. The reason I'm using this instead of a muffler is that it will save about 60lbs (2 mufflers) plus the exhaust will sound better hopfully.

Anyone know of a cheap punch press that might do the job?

Thanks

Quote:

Originally Posted by fj40guy

Hammer driven nailer! (Type that is loaded with the 22 explosives).

On a more serious note... all I can think of is a "four sided" punch. Top of it looks like a praymid. What a pain, punch... hammer... wiggle punch out... punch... hammer... I'd go nuts (and spend $60 for a decent muffler).

What about taking a FLAT SHEET OF METAL? Punch over a piece of wood. Once done, roll the sheet and weld the seam. It would go quicker, thinner sheet metal could be used for the punch operation (easier to do).

Why are you making your own muffler? (Oh, I did have a sports car that could only use mufflers 9" long (it fit between the "X" in a frame... pain in the rear to find a muffler that size with any flow). Discovered the easiest way to quiet the exhaust down was to bolt on a turbo with a 18" straight pipe (noise wasn't bad at all!)

Tom

fabcam · 08-09-2004, 01:57 PM

Quote:

Originally Posted by res0zvle@charter.net

fj40juy

Thanks, some good ideas - even the one about the nailer - maybe using it as an impact punch. The reason I'm using this instead of a muffler is that it will save about 60lbs (2 mufflers) plus the exhaust will sound better hopfully.

Anyone know of a cheap punch press that might do the job?

Thanks

You may want to find a shop that can laser cut a tube. This will give you everything you are looking for except price. Depending on the qty needed this maybe a good option.

Wideopen · 08-09-2004, 11:35 PM

Why don't you just buy some from summit?

08-04-2004, 10:30 AM	#1 (permalink)
res0zvle@charter.net Registered User Join Date: Jul 2004 Member # 33779 Posts: 51	Punching Holes into Pipe I'm attempting to make an exhaust baffle. I need to punch many square pencil-sized holes into one inch pipe. The holes cannot be drilled as the punched inner notches act to retrict exhaust flow. Anyone have any ideas as to what I can use to make the punches? Thanks!

08-04-2004, 11:21 AM	#2 (permalink)
Old Scout IH/Rover Moderator Join Date: Feb 2000 Member # 17 Location: Aptos,Ca Posts: 13,402	Why not drill and just clean up with a die grinder? __________________ I like beer. On occasion, I will even drink beer to celebrate a major event such as the fall of communism or the fact that the refrigerator is still working." BUY MY BOAT http://www.pirate4x4.com/forum/misc-...e-history.html

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08-04-2004, 02:08 PM	#4 (permalink)
fj40guy Rock God Join Date: Jan 2002 Member # 9576 Location: Texas... off 183A Posts: 2,230	Hammer driven nailer! (Type that is loaded with the 22 explosives). On a more serious note... all I can think of is a "four sided" punch. Top of it looks like a praymid. What a pain, punch... hammer... wiggle punch out... punch... hammer... I'd go nuts (and spend $60 for a decent muffler). What about taking a FLAT SHEET OF METAL? Punch over a piece of wood. Once done, roll the sheet and weld the seam. It would go quicker, thinner sheet metal could be used for the punch operation (easier to do). Why are you making your own muffler? (Oh, I did have a sports car that could only use mufflers 9" long (it fit between the "X" in a frame... pain in the rear to find a muffler that size with any flow). Discovered the easiest way to quiet the exhaust down was to bolt on a turbo with a 18" straight pipe (noise wasn't bad at all!) Tom

08-09-2004, 11:35 PM	#7 (permalink)
Wideopen Banned Join Date: Aug 2003 Member # 22380 Location: Camas Wa. Posts: 630	Why don't you just buy some from summit?