New Custom Briggs Opposed Twin Exhaust?

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.



And two 1-3/16 pipe interconnecting the two cylinders (so they talk to eachother).





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

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.

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.

i think it will work good, and it should give a good sound, the drain hole is a good idea

I always here.of the racers running two into one exhausts but idk why lol

TroyBilt Pony wrote:

I always here.of the racers running two into one exhausts but idk why lol

Cause cylinder 1 and 2 share block i guess, so they like to "talk" to eachother on all ends. On the opposed intake is shared, so should the exhaust i think.

Will need a Stereo Camcorder for the final test of how it really sounds tho.

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.

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.

I forgot to update this, Also I never can find this Exhaust topic, I keep looking under engine and shiz

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.

Looking good, Thunder!

Looks good gonna sound good