Hello everyone,
As i already said the trial carburettor i have made to test the engine works so nicely that i will keep it. The slot i have milled in the venturi barrel improves the suction of fuel so well that it was possible to mount the fuel tank 18 cm below the carb without problems.
I also think there is a huge improvement in atomization ( maybe because of heavy turbulence ) especially at low rpm / idle .
I tried another venturi without the described slot and it was not possible to adjust the needle to a position suitable for high speed and low speed.
This moved me to draw the carburettor as a drawing for sharing it. Maybe some of you guys has some time to build one and test it on a petrol engine of the size 35 - 60 ccm if you can deal with the metric measurements ?
The picture is only low resolution, i will try to post a high resolution drawing in a Zip - file also.
Best regards,
Thomas