Hi,

I've used various means to make smoke oil injectors in my homemade mufflers for my conversion engines, but I think I've found the cheapest and easiest method now.

Just go to the hardware store and buy a 1/8" pipe thread by 1/8" compression tube brass fitting. While you are there, pick up some 1/8" copper tubing and some extra 1/8" compression ferrules or sleeves. If your hardware store doesn't carry these things, any auto store will have them.

First drill the fitting all the way through with a 1/8" drill bit so the tubing can go through the fitting instead of entering a small amount and stopping as is normal. Then drill a hole in the muffler in an appropriate place, and screw in the fitting. I then silver soldered mine, but JB Weld would hold it fine as well. Then insert a piece of 1/8" tubing of an appropriate length, and lock it down with the ferrule and nut. I locate the end of my tubing (injector) in the middle of the exhaust stream near the exhaust entrance in the muffler, and I flatten the tube slightly to disperse flow somewhat, and angle the tube slightly away from the exhaust port.

I used to buy "fuel barbs" to solder to my tubing to prevent the hoses from slipping off, but I now use the 1/8" tubing ferrules. Much cheaper!!

Pics tell the story....

AV8TOR