<VV> Surprise surprise

[Hugo Miller]

A bit of tubing in each venturi & the other end in your ear and compare 
the hiss. That works better with variable venturi carbs such as SU's, 
but it's a lot better than nothing. You can get all sorts of clever 
gadgets that you can plug in to the mouth of the carb these days, but 
I've never bothered with them. I don't think it will make a lot of 
difference off idle. I'll tell you what IS useful though - one of those 
laser thermometer things. You can point it at various bits of the engine 
& check that everything is generating the same temperatures on each side 
and even on each cylinder if you can get at them. I use them mostly for 
finding blockages in compressor air lines on commercial vehicles also - 
where you get a carbon build up the pipe will get hotter at that point. 
It's one of those things you wonder how you ever managed without!

On 2020-03-03 23:25, Matt via VirtualVairs wrote:
> Way to go!   Most times that’s all it takes….   Being a Brit….  How
> do YOU balance Airflow of the carbs?
>
> Matt Nall
> Sea Mountain
> SW  Oregon Coast
>
>
> Sent from Mail for Windows 666
>
> From: Hugo Miller via VirtualVairs
>
>
> Well, I took that abomination of a carburettor to bits & cleaned it -
> and not only does it now idle smoothly, but the detonation has GONE. 
> It
> must have been running lean throughout the range. It wasn't running 
> on
> the idle jet, but you could hear it come in quite clearly as soon as 
> it
> came off idle, so I assumed the rest of the carb was working ok.
> Obviously it wasn't. I am genuinely surprised that a simple weak 
> mixture
> would cause that amount of detonation, and I am equally surprised 
> that
> simply cleaning one carb would cure it. But it has.
>
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