Here is "How a carb works " great You-tube .

[ArticiferTom]

 

 

[JACK M]

Thanks for posting this Tom.

Being a mechanic I always knew the theory of a carburetor.

But the work these guys put into demonstrating the workings of each stroke is amazing. 

Now if I only knew more about these high speed video cameras.

[ArticiferTom]

Yeah , Believe it said 28000 frames per second . doesn't seem possible . But really show alot about how prewar carbs mostly work . Was surprised by the bowl agitation ,going on .

[Max4Me]

I have worked on and rebuilt many carbs in my life and understood the function of them, but this video was really amazing. Many thanks for posting this video. 

[Fermato]

Really ,really good 

Thanks for share

[edinmass]

Running carburetors with the top off or “open” is nothing new. Here is a 1935 Pierce that had an unusual problem I fixed two months ago. It was a “ professionally rebuilt“ unit that had plugged channels, dirty idle air bleeds, and a crappy modern needle and seat that was machined incorrectly causing a rich condition from fuel dumping. Notice the 1933 Snap On Stromberg float adjustment tool............I have a video of it running with the top off. It’s standard procedure on cars I sort. You can see fuel pressure and how it’s effecting float height, as modern fuel density is much different than 80 years ago.

[Grimy]

That center screw is a potential "oh shxt" moment--make sure your screwdriver is thoroughly magnetized....

[Bloo]

It's nice, isn't it, when they don't put the valve in the lid.