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Carb Balancing - on the bench?

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Lobo:
Hi all,
Lateral thinking or won't work?  Have just torn down / rebuilt the carbs of my K2. Last night had a brainwave (??!) and balanced them on the bench via the Hoover (don't tell the missus). With a steady vacuum got nice / repeatable stable readings across the bank, though of course not in the 16-24 cm Hg range (which I guess is simply that around 900rpm idle). Point is, the carbs are 'balanced' spot on.
Or are they?  In this exercise are you (a) trying to match the throttle openings precisely (which I have) or..(b) are you trying to match the vacuums taking into account each cylinder performance. eg - one worn cylinder would throw its carb slide out of matched position when balancing the vacuum.
Cheers, Lobo.

Bryanj:
sorry matw the answer is B. BUT what you have done will be close

archmill:
I set carbs by eye on the bench then use the carb balancer with the engine running. To tell the truth they are never that far out when using the carb balancer. Like the idea though  :)

K2-K6:
I like that for lateral thinking Lobo and I think you'll be very close in practice if you measure them again with the engine running, be interested for you to let us know what readings you get.

I understand what bryan is saying and can see that it will have some effect, but equally if one cylinder requirment is that much different then the linearity of throttle opening given by the linkage could be equally wrong as the thottles are opened more.

I guess if you thought it through logically then a case for setting them equal at about one third opening and accepting some error at fully closed and fully open would best suit the engine operating range.......You may have created a way to do that Lobo...! if you put a block under the idle stop to simulate 1/3 opening before checking the vacuum readings.

Lobo:
We'll see,...will report back on actual bench set-up versus engine set-up, tho' likely after xmas. Funny old thing K2-K6, I DID set them up at 1/3 throttle - only because the bloody Hoover kept cutting out! (overheat!)
By hoover (!), by eye, they are perfect,  fingers crossed...

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