After years of fiddling with an old TME pump, I finally went out and plopped down the cold hard cash ($8) for a windshield washer replacement pump form Walmart.

It runs off of a separate 4.8 battery pack, and is turned on and off by a servo hitting a micro-switch ($1.98 - Radio Shack) and you will also need a check valve (Available at your LHS) and a flow restrictor, which you can make from a block of wood (or dowel) and a screw (See pic).

You also don't need a special muffler. Just add a pressure fitting to the muffler's header as close to the engine's hear as is practical. If you're not familiar with "Bernoulli's Principal", here it is in a nutshell (in regards to a smoke system):

"The fat part of the muffler has high pressure; the skinny part has low pressure."

That's why you want to tap the header and not the muffler.

Now, as far as preheating goes... Don't wrap your oil tubing around the muffler. One of the keys to good smoke is HEAT. If you're stealing heat from the muffler, you're essentially robbing Peter to pay Paul.

What you would be better off doing (if you want to preheat) is to wrap the tubing around the cylinder head, but I have found that I don't even have to do that. Instead, I wrapped my muffler with a little bit of Fiberglass insulation, then wrapped tin foil around that and held it in place with some copper wire.

Now, run your oil line from the pump, through the flow valve and the check valve, and into the header.

I have this system on a YS 91AC and I get incredible smoke