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Engine basics => Engine set up tips => Topic started by: Richard Logston on September 03, 2015, 02:41:40 PM
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I have a McCoy 35 Red Head that has vey good compression and shows very little use. I ran a lot of these back in the sixties with good success. I know the knocks on this engine and it's short comings. Question is has anyone made or used a muffler on this engine. I have a Do-Bro strap on muffler, but I would think you would not want to create too much back pressure or over heat it. Question, Has anyone ran this engine with a muffler? I have made tongue mufflers from Do-Bro muffler extension stock in the past Also have made tongue mufflers from alum. stock just using hand tools. Thanks, Richard
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YES. I run a muffler on 40 in my stuntwagon. Dave Royer runs one on his 35 in a warrior. You'll need to add some castor oil. Min. All castor content should be 25-30%. You engine will run hotter because of the back pressure. You may have to open up some holes in the muffler. Back in the good old days I also used a Tatone strap on muffler ...worked good!
Scott
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Scott, Thanks for your reply. I was expecting more input on this subject. Richard
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Not much more to say beyond what Scott has posted except to ask him to make one for you ;). He made one for my early 60's 35 RH, a piece of art.
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Do a search on the forums, I think here in the engine section, and some one did an excellent thread on how to make a muffler out of sheet aluminum using only hand tools, and I think he uses a .35 RH in the photos. Really a neat and ingenious method that I want to try some day. If it's not, it should be one of those threads pinned to the top of the section. Check it out.
Good luck and have fun,
Dan McEntee
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I finally said the magic words in the search function and found it. Try the link below;
http://stunthanger.com/smf/index.php/topic,7960.0.html
If you have a Dubro universal muffler, you can reduce the back pressure by turning the set screws on the exhaust to open the spring some to allow more exhaust flow. I think that is how they worked. The biggest thing to watch with strap on muffler is getting the strap too tight and distorting the cylinder, affecting the engine run. With a little experimentation, you should get a nice run on a Red Head with a muffler installed.
Good luck and have fun,
Dan McEntee
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OK, now we are getting a little action on this subject. I will try to post my home made mufflers, one is for a OS 40 FP and the smaller one is for an Old Fox 19. These are made with hand tools only, Maybe a little rough but should work for what they are intended for. The holes are just a starting point, may need more, only testing will determine that. Richard
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Dan, Thanks for the link on mufflers, very informative and educational. Richard