[Healeys] BJ8 carb adjust question

[Freese, Ken]

I have recently been conversing with a long time British sports car
mechanic, but I think he is mistaken in his approach to adjusting SU
mixtures.
He is using a gas analyser without a rolling road, adjusting the mixture
at idle and then complaining when it changes dramatically at off idle to
2800 rpm or so. He can't understand it.

I say adjust at idle and don't bother with any other rpm since the
needles take care of that and if the engine is stock, they are ok. Just
check the plugs after a drive. If the mechanic had a rolling road then
he could be concerned with non idle conditions and needle profiles.

Who is right?
Ken Freese
65 BJ8