Achto 27,827 #1 Posted March 11, 2019 If you can't find what you want, then you have to make it. This was my reason for building this baffle press. I wanted to quiet down the exhaust on my latest build yet maintain a look that I wanted. After a long search I haven't been able to find just the right part to fit the bill. To help make my vision a reality I made this tool. After doing the math to figure out where I wanted my louvers, I marked the pipe out & cut slits in it. Then I put the pipe in my press and formed the louvers. A look down the inside of the pipe. This pipe will get end caps welded on it & will be slid inside of my stack. 6 21 3 Share this post Link to post Share on other sites
dclarke 4,034 #2 Posted March 11, 2019 I like that, Dan! Nice work! 2 1 Share this post Link to post Share on other sites
ztnoo 2,298 #3 Posted March 11, 2019 Very innovative! Nice job. 1 1 Share this post Link to post Share on other sites
classiccat 548 #4 Posted March 11, 2019 you won't find one of those at Harbor Freight.... yet! 1 2 Share this post Link to post Share on other sites
prondzy 3,882 #5 Posted March 11, 2019 Thats awesome Dan! 2 Share this post Link to post Share on other sites
oliver2-44 9,875 #6 Posted March 11, 2019 Show us the rest of the build and installation. What size OD is the pipe verses ID of the stack? Will it have centering rings 2 Share this post Link to post Share on other sites
WHX?? 49,193 #7 Posted March 11, 2019 Nice Dan ... we used to call them church key baffles cause some looked like they were made with a church key! We used to slide a set down the drag pipes of our iron barrel Sportsters. Not that they quieted things down a whole lot but it gave an officer of the law something to stop his night stick against when we got pulled over for loud pipes! Looks like you saved yourself a bit of money for what they get for some now... https://www.jpcycles.com/exhaust-baffles I was thinking of getting one of Jim Kemp's stacks for a tractor but now thinking of making my own??? Paint it and put some flames on it?!? Looks like you are using run of the mill auto exhaust pipe? Any thoughts on wrapping them with fiberglass things are still a little loud? 2 1 Share this post Link to post Share on other sites
Achto 27,827 #8 Posted March 11, 2019 40 minutes ago, WHX22 said: Looks like you are using run of the mill auto exhaust pipe? Any thoughts on wrapping them with fiberglass things are still a little loud? It is regular auto exhaust pipe, It will be covered with a nice chrome stack though. My plan is to make the baffle removable, This way if it is too loud yet I can pursue the fiberglass option. 3 1 Share this post Link to post Share on other sites
WHX?? 49,193 #9 Posted March 11, 2019 4 minutes ago, Achto said: It is regular auto exhaust pipe, It will be covered with a nice chrome stack though. My plan is to make the baffle removable, This way if it is too loud yet I can pursue the fiberglass option. Good Idea.. those *********** engines can be a bit loud... 1 2 Share this post Link to post Share on other sites
Achto 27,827 #10 Posted March 11, 2019 48 minutes ago, oliver2-44 said: Show us the rest of the build and installation. What size OD is the pipe verses ID of the stack? Will it have centering rings It may be a couple of weeks before I can finish the stack but I will definitely share it with you. The inner pipe is 1 3/4" the outer pipe will be 2 1/2". I would have liked to go a little larger on the stack but space will not allow for this. No plans for center rings 2 Share this post Link to post Share on other sites
ebinmaine 68,514 #11 Posted March 11, 2019 Wicked good work Dan. I'll be following along to see your end result... 1 Share this post Link to post Share on other sites
PeacemakerJack 10,739 #12 Posted March 11, 2019 Another masterpiece from the maestro!!! Well done Dan. I can’t wait to hear/see/drive this one when complete. I’m also interested to see the functionality of this pipe versus the one you made for your plow mule raider... Necessity, once again, Is the mother of invention! 3 1 Share this post Link to post Share on other sites
Pullstart 63,113 #13 Posted March 29, 2019 You do such nice work, Dan! 1 Share this post Link to post Share on other sites
Achto 27,827 #14 Posted March 29, 2019 (edited) 1 hour ago, pullstart said: You do such nice work, Dan! Thanks! Some times us back yard hacks can manage to pull things off. Still waiting for my piece of chrome pipe so I can finish this project. Edited March 29, 2019 by Achto 1 2 Share this post Link to post Share on other sites
Achto 27,827 #15 Posted April 17, 2019 (edited) On 3/11/2019 at 8:34 AM, oliver2-44 said: Show us the rest of the build and installation. Well my chrome pipe arrived and I finally had the opportunity to finish this project up, so as requested I'll share the build on my stack. My louvered pipe is 1 3/4", my chrome pipe is 2 1/2" so I will need to make a transition. To start this I grabbed some hole saws and made some washers from some 14ga sheet metal. First cut, just under 2 1/2" od. Then cut them again to 1 3/4" ID Next the pieces to fit inside the 2 1/2" pipe. First I cut two 2 1/2" pieces of pipe to length, 3" long for the bottom and 1"long for the top. Now you can't slide a 2 1/2" pipe inside of a 2 1/2" pipe and a 2 1/4" pipe is any thing but a tight fit inside of the 2 1/2" pipe. I require a tight fit between the pipes, so this is the best way I know to get there. I cut the pipes length wise so that i could collapse them. I continued trimming this gap until these would slide inside of my stack. Now that it fits inside I can tack weld the seam then remove this piece and finish welding it. This process is repeated for the 3" long piece of pipe. I plan on bolting these pipes together instead of using a clamp so I slide the 3" long piece inside the stack and drilled 3 holes through them. Then I adorned the inside of the baffle pipe with weld nuts. Then I added the washers to these pipes. I welded the upper 1" piece to the baffle. Then I slide the baffle inside the stack and tacked the lower piece on. This method helps keep every thing centered. All welding complete on the baffle. A little paint and a wrap with fiberglass and the baffle is ready for installation into the chrome stack. Here is the finished product. Sorry no picture of it installed on the tractor. That will come later, when the tractor is finished. An important note when installing a new chrome pipe. Make sure that the pipe is completely clean before you start the engine for the first time, unless you want permanent finger prints or or smudges burnt on to your chrome pipe forever. Edited April 18, 2019 by Achto 3 8 Share this post Link to post Share on other sites
PeacemakerJack 10,739 #16 Posted April 17, 2019 (edited) Looks great Dan! Thanks for the very detailed description and plentiful pictures. Looking forward to listening to the beautiful music that it makes... Edited April 17, 2019 by PeacemakerJack 1 1 Share this post Link to post Share on other sites
Shynon 7,461 #17 Posted April 17, 2019 Nice Dan but remember 1 1 1 Share this post Link to post Share on other sites
WHX?? 49,193 #18 Posted April 17, 2019 (edited) Outfreakingstanding Dan ... beats my idea for building a stack all to hell. She looks to be a tall drinkawater too! You best be carfull who sees this you might be taking orders! Edited April 17, 2019 by WHX22 1 Share this post Link to post Share on other sites
Tractorhead 9,065 #19 Posted April 18, 2019 Cool work, a question i have Dan, The exhaust system like you planing was a frequency filter. At your picts i just see only identical distances, so do you just preferr to filtering one rpm in silencing? (workrpm) Think i would work with lightly increasing distances, so that the Filter works over more octaves, means it works with a wider bandwith or in other words it works on different rpm‘s the peak shall be your workrpm, so i understand your muffler. In my experiences and experiments on my Quadbike exhaust i learned, the max silencing not allway’s is in the center of the whole frequencies (rpm) bandwith. but can be shifted up or down with a movable shiftin piece inside. Resonance needs it space to supress the noise. But cool work you did by the exchangeability of the silencer. Share this post Link to post Share on other sites
Achto 27,827 #20 Posted April 18, 2019 (edited) 5 hours ago, Tractorhead said: a question i have Dan, I have no doubt that this pipe will still be loud, and I'm ok with that. I just wanted to tone it down some. My original plan was to just run 1 3/4" straight pipe, so I ran the engine with one on. It was unbearable and had a very high pitched rap that I didn't like. I sort of designed my baffle like after market slide in ones used on motorcycles. It will give some back pressure and hopefully the 2 1/2" pipe will help mellow the tone. Hopefully I will be able to hear the results of my experiment soon. Edited April 18, 2019 by Achto 1 Share this post Link to post Share on other sites
WHX?? 49,193 #21 Posted April 18, 2019 You take Tractorhead's advice Dan you be able to play the Star Spangle Banner on it! What's up with that red reflection in the last pic?!?!? You see his new signature line @Rp.wh!?!? "He who is without oil, shall throw the first rod" Compressions 8.7:1 3 Share this post Link to post Share on other sites
Achto 27,827 #22 Posted April 18, 2019 4 hours ago, WHX22 said: What's up with that red reflection in the last pic?!?!? That's a 10gal fish tank. 4 hours ago, WHX22 said: "He who is without oil, shall throw the first rod" Compressions 8.7:1 You like that? It's a quote from the gear head bible. 2 Share this post Link to post Share on other sites
jimkemp 526 #23 Posted April 26, 2019 Nice job Dan , I like it , how much does that chrome stack cost , there hard to find at a decent price , I know the ones I use for mine they keep raising the price to the point of any higher price on the chrome they wont be worth building , But nice work on your design 1 Share this post Link to post Share on other sites
Achto 27,827 #24 Posted April 26, 2019 1 hour ago, jimkemp said: how much does that chrome stack cost They didn't give it to me, that's for sure. kinda felt bad to cut a foot off of it. https://www.iowa80.com/pd/25d-x-36l-chrome-curved-top-stack-expanded-end/10014/ I agree with you on the price of chrome pipes. I did find some cheaper ones but they were just that,a thin POS with poor chrome. I did get a chance to run the tractor with the stack. As suspected by the shear design (no room for the exhaust to resonate) it is not real quiet. It does give my diesel engine a very nice sound though, much better than it had with the 1 3/4" strait pipe that I had tried on it. 2 Share this post Link to post Share on other sites
MikMacMike 479 #25 Posted January 23, 2020 On 3/29/2019 at 9:21 AM, Achto said: Thanks! Some times us back yard hacks can manage to pull things off. Still waiting for my piece of chrome pipe so I can finish this project. Achto, your a Hack n a half to say the least.....agian you blew me awy. 1 Share this post Link to post Share on other sites
