Fascinating Video - How a carburetor works

[JPSmit]

Got this in my inbox this week. I learned things and the high speed photography is stunning.

 

[DrEntropy]

'k, JP. That sent me down th' rabbit hole. His vid on how film works is really good. And the fascination with the entire process, from choosing when to push the shutter release to hanging a captured instant in time on the wall, has held me spellbound from early youth. I was fortunate to have been mentored by a second generation professional, learning the craft in all its aspects. This fellow's descriptions of it all are splendid.

 

[JPSmit]

It took a significant act of the will not to jump down that same rabbit hole! I have bookmarked him though so will be back. He is an exceptionally good host as well.

 

[John Turney]

Now, all we need is a transparent SU.

 

[DrEntropy]

That video makes plain the force of the venturi effect.

In a couple instances, I've had folks say they just couldn't get their Zed-F carbs to run well anymore, especially at idle. On examination, the "floating needles" had been rubbing the jets so long they wore the jet orifice to ovality. Jet and needle swap out and all was better again.

 

[DavidApp]

I have just posted that video on the fb page that our car group has. That guy dose some great videos.

How would have looked if he could have printed a round venturi?

David

 

[waltesefalcon]

That was fun, after all these years I actually got to watch, in slow motion no less, fuel be drawn into the venturi and mix with air! I skipped around a bit, I felt that much of it was elementary but we probably have a much different background than his typical viewers. He has some good videos, I rather enjoy his video on the Whitworth cannon.

 

[GregW]

Here is a video I saw a month or so ago about a new engine design.They've made it transparent as well so you can see the combustion happen. What I think is cool about this motor is it has 3 combustion events per rotation.

 

[Boink]

The slow-mo makes that carb movie. Fun to see it up close like that. Thanks.

 

[Basil]

Definitely fascinating.

 

[Boink]

His carb is ultra simple, of course, with no compensation for the Venturi problem that the faster the airflow, the richer the mixture – making compensation jetting necessary – as in Weber carbs – or variable Venturi / constant depression design, as in SUs and Strombergs.

One of the best descriptions of a carburetor:
“A scientifically-based device providing the wrong mixture to an internal combustion engine at all speeds.”
True, but of course could also read “approximately correct”.

 

[John Turney]

One of the best descriptions of a carburetor:
“A scientifically-based device providing the wrong mixture to an internal combustion engine at all speeds.”

I thought it was a French verb meaning "leave it alone."

 

[pdplot]

SU - should be SA - stay away.