Sorry for hijacking the thread.Just have a question also with regard to boosters.
I have noticed when I am REALLY driving hard and gearing down I press thebrake pedal and with the heel of my right foot blimp the throttle before letting the clutch out so that the revs equals the gear.If you know what I mean.
Ok, with the datsun it is easy.Revs jump quite quickly and this procedure does'nt upset the braking due to no booster.
With the VW golf, the booster is not so strong and I can get it right without too much upsetting of the brakes.
With the Nissan Almera (Pulsar N16) it just does'nt work. Revs is quick but when blimping the throttle the brakes once almost locked up because the booster is so strong and sensative.

Is this also why racers don't use boosters.Making the brakes to sensative?