I haven't tried doing it upright yet though. Maybe i'll remember next time. Doubt it would work anyhow.

The cowl is cut open alot on the bottom already because the pitt muffler would not fit in anyways and to get the cowl on you have to open it up quite far back as well. The hole's size must be at least close to 5 by 6 inches shaped a little like a heart. I thought about cutting the front holes next to the spinner open more because on the head side the carb is obstructing the port quite a lot. But there is not much one can cut away. The LHS owner said cutting it open more is not going to help. He said the air just takes the shortest route in and then down the bottom of the cowl out the big hole. Bypassing the head of the engine. He suggested glueing in some flat pieces of balsa to direct the air to pass through the head, in other words closing up from the intake right to the engine. This should not be too difficult, it's just going to be alot of work fitting and sanding and then fitting and so on?