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If you're managing a steady speed round the track and not going up and down the banking
There's an interesting thing here for more advanced maths illustration. Leaving the inner tubes aside, because they are nothing like a simple change of mass, let's say the initial sample bike comes in at 6.75kg. To pass scrutineering, you buy a 50g slug of Tungsten and glue it inside one of the frame tubes. On a pursuit bike, where do you glue it to maximise the benefit?
gbj_tester-
I can bullshit rationales for a number of locations, but can't decide what the magnitudes of the effects would be. Purely on the ∆h of the mass I'm going to guess at the rear dropout?
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In the head tube, to help even out weight distribution and tyre deflection.
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As close as possible to the centre of mass of the frame, so that it doesn't make the bike respond in any unexpected or unusual way when peeling off the front of the paceline.
Assumption: pursuit = team pursuit; maximize benefit = minimize adverse effects
Thrustvector
Sumo
Cupcakes
Depends on your path round the velodrome, doesn't it? If you're managing a steady speed round the track and not going up and down the banking, the only difference is going to be in the initial work of accelerating up to speed.
I would have thought that on a track it was the reduced rolling resistance of lightweight tubes that made the greater difference (and wouldn't they have used tubs?). Rolling resistance is also a function of load on the tyre, but a 50g difference is going to be an infinitesimal effect at track pressures.
(Edit - beaten to it by Tester)