| | New Custom Briggs Opposed Twin Exhaust? | |
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+2Doc Sprocket Thunderdivine 6 posters | Author | Message |
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![New Custom Briggs Opposed Twin Exhaust? Empty](https://2img.net/i/empty.gif) | Subject: New Custom Briggs Opposed Twin Exhaust? June 30th 2013, 6:24 pm | |
| I'm making this mostly cause of lack of space on my racer, but also cause i think it will sound sweet. What do you guys think? A 3" Pre-chamber that will connect two 2" pipe that will come out below as straight pipes. ![New Custom Briggs Opposed Twin Exhaust? 8E4E7866-D0B8-4658-9D69-99CCA644F2FB-45700-00000DD3BAFC7E7F_zps3b93c29b](https://2img.net/h/i1208.photobucket.com/albums/cc377/GEN1975/Racing%20Mower%20Project%20Thunderdivine/8E4E7866-D0B8-4658-9D69-99CCA644F2FB-45700-00000DD3BAFC7E7F_zps3b93c29b.jpg) And two 1-3/16 pipe interconnecting the two cylinders (so they talk to eachother). ![New Custom Briggs Opposed Twin Exhaust? CB234236-1EE0-4616-8A0F-FFF1E642C740-45700-00000DD3CA89DEA5_zpsa61b1fc9](https://2img.net/h/i1208.photobucket.com/albums/cc377/GEN1975/Racing%20Mower%20Project%20Thunderdivine/CB234236-1EE0-4616-8A0F-FFF1E642C740-45700-00000DD3CA89DEA5_zpsa61b1fc9.jpg) ![New Custom Briggs Opposed Twin Exhaust? 8290A6A4-B99F-46BA-B60F-D6F8385D5F36-45700-00000DD3D12C09C7_zpse2f52a95](https://2img.net/h/i1208.photobucket.com/albums/cc377/GEN1975/Racing%20Mower%20Project%20Thunderdivine/8290A6A4-B99F-46BA-B60F-D6F8385D5F36-45700-00000DD3D12C09C7_zpse2f52a95.jpg) The 3" pipes end will be getting some end caps. And I see many benefits of having those two connectors. Then I can run two side pipes when I want, and only one if I want. I can implement a new muffled set if i need too. A stacked set, endless possibilitys ![Razz](https://2img.net/i/fa/i/smiles/icon_razz.gif) | |
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![New Custom Briggs Opposed Twin Exhaust? Empty](https://2img.net/i/empty.gif) | Subject: Re: New Custom Briggs Opposed Twin Exhaust? June 30th 2013, 8:06 pm | |
| I think it'll look decent, but I'm not sure about flow/scavenging. Seems the gasses will have a sharp 90* or two to go through, unless I'm envisioning things wrong. | |
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![New Custom Briggs Opposed Twin Exhaust? Empty](https://2img.net/i/empty.gif) | Subject: Re: New Custom Briggs Opposed Twin Exhaust? June 30th 2013, 8:39 pm | |
| Like this quick sketch, Left is viewed from the front, Right is sideview, the red is the exhaust blue scribed is the frame. The 3" pipe will fit between a stock mower frame. Then Two 60* pipes will be side pipes. ![New Custom Briggs Opposed Twin Exhaust? DAA5C6B9-D52B-4F32-93FF-2855E7607D6A-52577-00000FEC27F8DB63_zps5d15f2ae](https://2img.net/h/i1208.photobucket.com/albums/cc377/GEN1975/Racing%20Mower%20Project%20Thunderdivine/DAA5C6B9-D52B-4F32-93FF-2855E7607D6A-52577-00000FEC27F8DB63_zps5d15f2ae.jpg) | |
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![New Custom Briggs Opposed Twin Exhaust? Empty](https://2img.net/i/empty.gif) | Subject: Re: New Custom Briggs Opposed Twin Exhaust? July 5th 2013, 5:52 pm | |
| - TroyBilt Pony wrote:
- I always here.of the racers running two into one exhausts but idk why lol
The reason is scavenging. The prior exhaust pulse (obviously from the other cylinder) creates a low pressure area (a vacuum) behind it, and helps draw out the next pulse. The better en engine breathes, the better it runs. BTW- This is NOT only true for oppys or twins. Any engine can benefit from multiple cylinder scavenging, but the system must be designed reasonably well. | |
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![New Custom Briggs Opposed Twin Exhaust? Empty](https://2img.net/i/empty.gif) | Subject: Re: New Custom Briggs Opposed Twin Exhaust? July 6th 2013, 5:52 am | |
| I run dual into a single, but that was just because I was too lazy to run dual pipes. Sounds sweet though, it toned it quite a bit. ![](https://i.servimg.com/u/f86/19/98/54/71/separa13.png) Head Forum Administrator ** Chat Moderator ** Facebook Page AdminATLTF Facebook Page ** Chatbox ** How To Upload Pictures
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![New Custom Briggs Opposed Twin Exhaust? Empty](https://2img.net/i/empty.gif) | Subject: Re: New Custom Briggs Opposed Twin Exhaust? July 24th 2013, 7:24 pm | |
| Next step is to use Junkstars idea kinda, make a muffled set, and one straight one for shows. Since it's easy to swap out the 2" pipes now. | |
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