Fuel flow meters

[Peter Davis <101621.3070@compuserve.com>]

I understand from discussions with various people that these objects work by
passing the fuel through a small hole. How it measures the flow is beyond me and
of little interest but I understand that the area of the small hole is less than
the combined area of the main jets in the carbs.

Is this true? and if so, should people be a bit wary of fitting one as it will
reduce the fuel pressure at the important end.

Peter.