I want to show you how I am increasing the air flow into the carburetor. As you can see in
Photo 1 there is only 5/8" between the carb and firewall, I much prefer to see a gap of around 1 inch. There are many ways to solve this problem, the easiest way of which would have been to have factored it early in the build and set the firewall back a bit and use a longer engine standoff. Too late for that! I have also seen others create a trough so to speak into the firewall to gain more airflow. One could even let the carb draw air through the inside of the fuselage, but that would require a vent in the fuse. I knew it was going to be a problem so I tried to come up with a different more elegant solution.
On the bottom of the cowl on the original Bravo you will find a cowl scoop that directs air into the engine's carb, so I thought, boy won't it be cool to have a functioning cowl scoop. Alas my idea was thwarted when I had to cut out that portion of the cowl for the exhaust system. So here is my plan "B"...
Photos 2-3 here is the ducting that I made up to solve my problem.
You can see I just moved the inlet on the firewall directly inline with the cowl's front opening. I think this will work well!