does anyone know of any companies that make small diameter mufflers that can be used to quiet down an open-loop wastegate setup? anyone ever seen a setup like this?

 

Well, if you want to keep it open, I have heard of people putting lawnmower mufflers on there. I don't know how it sounds, but it's a very good idea.

For a while I entertained having a small resonator section put on my wastage dumptube, but I decided against it. I know Minekie supplies 1 inch resonators (at least the one in my area does).

 

some porsche turbos had this configuration. so there are little mufflers out there...lawn mower mufflers are good idea

 

...go to Home Depot, in the lawn mower/tractor "parts" section. They have a wall full of replacement chit like air filters, plugs, etc. You will find a 6" long muffler for a 7HP B&S engine. It's like $3.97.

I was talking to someone @ Tial the other day - he said he made his own wastegate muffler out of 2 pieces of pipe. What he described was EXACTLY like that Home Depot muffler, except with 10xs as much work (drilling a million holes, capping the inlet pipe, welding everything up, etc). When I saw that HD muffler for $4 I thought "screw making one - this thing is perfect!"

- Slater