Thanks

Thanks

I'm thinking about making. It will be in some of future videos.

Thanks, Unfortunately I don't have recorded sound with this muffler, the link below has the same design muffler only 3 inches, so you can see how it sounds on a bmw e39 2.5cc I6. kzfaq.info/get/bejne/h8-SlNGkxMmmeJc.html

Wurth HSS

If you can get them, 8% cobalt. When drilling stainless, go slow on the speed, and *do not let the bit dwell.* Give plenty of feed, so the bit cuts and does not rub. Rubbing will work-harden the steel - which will make it *much* harder to drill. Also, use a good cutting oil, and keep the bit well-oiled. Finally, keep your bits *sharp.* Dull bits will rub and work-harden stainless in a hurry.

@@dennisyoung4631 Yes i've used cobalt and they are superior to SS bits on pretty much everything. As you say, speed is the killer. Cobalt bits aren't cheap mind you. Thanks for the good advice! Lots of skill and patience required :)

these chambered mufflers are all based on the Helmholtz tube development, it is very delicate to taylor the sound the muffler will produce. there is engineers that spend their carrers tuning mufflers for automotive industry so it is a very good idea to use an original muffler specific to a vehicule to duplicate a home made muffler to avoid indesirable effects as droning.

Thanks. It does not matter which pipe will be the inlet and which the outlet, the flow of exhaust gases remains the same.

@@GPGarage1 Ok.

It's 2mm

@@GPGarage1 thanks for replying. Looks tough to get the stainless sheet to wrap around the muffler but I think I’ll try it. I’m thinking of making a muffler for an e46 m54b25. Have you made one for that engine? Do you have any tips or maybe best way to make the inside for nice sound? I was thinking of doing a perforated pipe inside and the rest empty but I think it might drone at low rpms

@@EmanuelFilms For the muffler, You don't need a thicker sheet than 1-1.2 mm, I worked with 2 mm because I had one. I'm not on the m54, I made it for the m52tub25 and if you're going to leave the middle resonator, then you can make the rear stright-through muffler, perforated tube with glass wool.

@@GPGarage1 thanks. Yes the plan is to only change the rear muffler. See what it’s like, then do other changes if it needs to be changed