to make the standard inlet almost as good as a very expensive alternative you need to open up the outlet ports and the inlet port
get a spare inlet manifold and using a dremel make the inlet hole bigger by removing the taper
the outlets need to be opened up by removing 1.5mm from the ports
you can see the taper quite clearly in this pic
here's a ported tb on a standard inlet, you can see the manifold needs opening up
