Ian Vincent Posted July 3, 2021 Report Share Posted July 3, 2021 My son sent me a link to this video, he thought I might be interested. It could probably be condensed a bit but for me it does what it says, it explains how a simple carburettor works. Rgds Ian How a carburettor works Quote Link to post Share on other sites
Peter Cobbold Posted July 3, 2021 Report Share Posted July 3, 2021 I like the seethrough venturi ! As an intro to the venturi it's OK. And Webers and Dellorto uitlise a venturi. But SUs and Strombergs do not involve a venturi at all. They are based upon gate-valve fluid mechanics. Any attempt to smooth out the edge of the piston or ramp to make it more venturi-like will fail ( because the venturi depression will pull the piston down !! ). Peter Quote Link to post Share on other sites
Ian Vincent Posted July 4, 2021 Author Report Share Posted July 4, 2021 12 hours ago, Peter Cobbold said: I like the seethrough venturi ! As an intro to the venturi it's OK. And Webers and Dellorto uitlise a venturi. But SUs and Strombergs do not involve a venturi at all. They are based upon gate-valve fluid mechanics. Any attempt to smooth out the edge of the piston or ramp to make it more venturi-like will fail ( because the venturi depression will pull the piston down !! ). Peter I agree about the Venturi but the effect of the gate valve in an SU is to create a low pressure area which draws the fuel up into the air flow where it is vaporised in the same manner as the model in the video. Rgds Ian Quote Link to post Share on other sites
MilesA Posted July 4, 2021 Report Share Posted July 4, 2021 Enjoyed that and it filled in the gaps in my 'knowledge'. Would be great if they could do something similar with an SU... Miles Quote Link to post Share on other sites
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