This is true. Although it depends on the size of TB you're running and what sort of output you're looking for. Simple maths tells you that a 36mm inlet is going to restrict a 43mm TB!
The close proximity to the entrance to the TB was a possible cause of resonance in the inlet manifold. Upshot was that we could not get the engine to rev through with the induction kit fitted, power just fell away after about 70bhp. In the end the car was mapped without the bob and induction kit, and you will have seen the results elsewhere.
I like simplicity of your solution David. Mine is to have a taller, longer alloy air box/plenum fabricated to match up to a shortened GSR induction hose - i.e. a simple 70mm ID elbow, on to the cone filter.
The technical drawing is done, i just need to cost up and commission it.
John
