Want to put on a traditional sounding hot rod full exhaust behind this flathead motor that will be going in my chopped & channelled 1927 T sedan. So my questions are: What brand are the best sounding mufflers for a dual exhaust for a flathead? Why? What diameter size tubing should be used for optimum sound? Why? Thanks!
I usually play golf on Fridays so I miss the weekly flathead muffler post but I'm here for this one. I used 2.250" pipes, Red's headers, 22" Smithy's and ran it out the back. Not my recipe, just paid attention to the guys that know and went before.
I like the sound of the aluminized glasspacks my local place stocks. 18" long in 2" or 2.25" diameter
13/4 inch with smithys old style sound. My 51 merc run straight pipes but the car is quite a bit longer so I don’t know how gruff it would be on the t
Running 1.75 and Porters on mine... can carry on a conversation while cruising but makes a nice sound when you get on it... Also, the type and direction of your tips makes a pretty noticeable difference. Chappy
F.Y.I. On Billy Bandits car I agree with the 2=1/4" pipe but notice he has a Huffer sitting on top of his intake. That little item adds a little different need for exhaust. I will tell you it sounds outstanding. Now for strait up carbureted motor you want just a little smaller pipe. 1=3/4" has been the go to size for years on our Flathead Hot Rods. Mufflers are kind of a personal thing. I like Smitty's or Mitchels myself. Also there is Horse Power in exhaust believe it or not. You can actually go backwards doing it wrong be it to big or to small of Pipe size. It's about breathing not just sound. For my Flathead powered Roadster should I ever get back to it I will use 1=5/8" pipe with the new version of Smittys because that's the size pipe it takes to make proper back pressure for the Motor connected to it. (at least I hope so) Billy, you surprised me in that you didn't find a way to make a polished Aluminum dist cap for that piece of Art.
I'm using Red's headers, 22" Smithy's and 2" tailpipes and they don't sound bad but not as crisp as I would like. Had a 50 Ford with about the same set up but smaller tailpipes and thought it sounded better.
I have normally run between 1 7/8" and 21/8" on a flathead. Something I learned from my dad and Smitty's (he didn't like Porters). The diameter goes up with the output of the motor. A motor that is not pumping out a lot of volume gets the smaller diameter tubes. here is something he always said to me, glass packs are for chebbys and steel packs for everything else. bear in mind he did not like Chebbys.
All that I read pointed towards 1.75" pipe and short glass packs (if any at all). Mine in a stock '47, fentons and 14" packs.....and cold.
Well after reading the H.A.M.B. feed back on my flathead exhaust question, I have decided to go with 1 3/4 inch stainless exhaust tubing with no mufflers. In the advent I find it too loud, I will simply cut the tubing and install some type of glass pack mufflers. Thanks for all the input!
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