DE exhaust question

[Kevin N.]

On page 7 of the DE engine plans Leonard makes reference to "brass charboy's"   What are charboys?   I'm guessing some kind of spacer made of brass mabe?

[Tom H]

Charboy, or Chorboy, or Choreboy?? is a scrubbing pad made of long strands of some material.  I think they can be found in brass, SS, maybe plastic.

It is used in the crankcase ventilation system to help condense the oil vapors back into liquid so the oil can return to the crankcase and not be spewed into the air.

Not used in the exhaust system, as per the subject line.

[Kevin N.]

Thanks. On further review of the drawing I see now where he writes "stuff with brass chorboys"  meaning the carb heat muff. I guess chorboys is a brand name of scrub pads you can buy in the Houston area. Should have read a little closer before wasting space on the forum.

[scottiniowa]

Thanks. On further review of the drawing I see now where he writes "stuff with brass chorboys"  meaning the carb heat muff. I guess chorboys is a brand name of scrub pads you can buy in the Houston area. Should have read a little closer before wasting space on the forum.

 Kevin,  Generic/regional term clarifications are never a waste of time.  A waste of time is all of us wondering or deciphering the meaning of the term on our own.  So I think it is good you asked.  I, in the upper midwest have not heard of such term, so was interested in the replies myself.  Thanks.

Scott

[Tom H]

Dang, it is used in the exhaust system.  I've always seen it used in the crankcase vent system.  Stubby has a different exhaust than the plans, so I never looked much at that section. 

We use traditional straight heat muffs.  I made a long spring, like a screen door spring, from safety wire, then wrapped the wire around the exhaust pipe inside the heat muff to get more heat exchanged.  It works, but I think the chore boy idea may exchange heat better.

I'm gonna try it out on the cabin heat first chance.

Thanks for the post.

[Steve]

Dang, it is used in the exhaust system.  I've always seen it used in the crankcase vent system.  Stubby has a different exhaust than the plans, so I never looked much at that section.  

We use traditional straight heat muffs.  I made a long spring, like a screen door spring, from safety wire, then wrapped the wire around the exhaust pipe inside the heat muff to get more heat exchanged.  It works, but I think the chore boy idea may exchange heat better.

I'm gonna try it out on the cabin heat first chance.

Thanks for the post.

Stainless is durable but sadly a poor heat exchanger - you will like the copper based scrubber a lot better...

[Dan_]

Stainless is durable but sadly a poor heat exchanger - you will like the copper based scrubber a lot better...

http://choreboyscrubbers.com/Products/Ultimate%20Scrubbers%20Pure%20Copper.aspx

[docmatt]

Scott, over here in Wisconsin, my mom used something called a "Chore  Girl".  Maybe she just changed the name because she was the only one in the house that used them.  Or maybe they were the copper ones. I think we need more of these meaningful discussions.  Things are kinda quiet around here.