<VV> Carb mystery

[Hugo Miller]

You mean the float chamber isn't always vented to atmosphere? SU's are. 
Unless you want to turbo-charge them, then the float has to have the 
same pressure as the air intake. As I write these words I've just 
realised something - th Spyder SUCKS through the carb, like a 
supercharger, doesn't it? I've never seen that before - the only 
carburated cars with a turbo I've seen are the MG Metro's, where the 
carb is AFTER the turbo (which is why the float chamber need to be 
pressurised). Interesting. Turbo-charging didn't really come in until 
fuel injection, in the UK at any rate. Does that make the Spyder unique?
On a broader note, your comments about that flap valve thing, and 
bending linkages to make them work, point up the difference between 
American and European engineering. American cars are, without wishing to 
be insulting, crude by coparison. But they work, and work well.
It was the same in WWII - German aircraft were built to perfection by 
skilled matser-craftsmen. Consequently they took ages to build, and had 
to be sent back to the factory for repair. The U.S., by contrast, 
churned out aircraft by the million. They were not perfect, but they 
were good enough to do the job. Instead of Master crafstmen, they were 
built by 'Rosie the rivetter' on the production line - housewives who 
wer trained to do one specific job and nothing more. We all know which 
system prevailed.
The Nazis believed that a woman's place was in the home, so, when they 
had to send their skilled men to the front, they used slaves from the 
concentration camps. When these poor sols weren't actually dropping dead 
on the job, they were sabotaging their work.
So American pragmatism triumphed over nazi ideology.

On 2020-03-22 03:12, FrankDuVal via VirtualVairs wrote:
> Bending linkages on carburetors is normal for many brands. Choke
> links, accelerator links, etc.
>
> I have no idea why you think the idle vent valve is egregious. It
> just vents the float bowl to atmosphere (not through the air cleaner)
> at idle to eliminate the hot percolation problem.  Real simple
> solution to a problem. The Rochester HV is NOT the only carburetor to
> have an idle vent valve function. And BTW, you bend the tang to
> adjust.
>
> Remember, our cars need to survive (let me recalculate for you ) -20°
> C to 50° C and from less than sea level (-100 feet, [-200 in Death
> Valley]) to 10,000+ (Pike's Peak is 14,000!) feet in operation off 
> the
> showroom floor for hundreds of miles at a time.
>
> Frank DuVal
>
> On 3/21/2020 5:22 PM, Hugo Miller via VirtualVairs wrote:
>>
>> And the method of adjusting the accelerator pump, if I recall, is to 
>> bend the operating rod.
>
>> The most egregious thing I found was a hole somewhere near the base 
>> of the carb that was covered by a rubber bung which was attached to 
>> some sort of lever. I have no idea what its function was, but it 
>> struck me as a proper Heath-Robinson arrangement which was just asking 
>> to give trouble (Heath-Robinson may be a British in-joke, I'm not 
>> sure).
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