lag for a start..

why put a turbo suited to an engine with say 400+ BHP, on an engine thats not going to make 350bhp?

putting a T4 on my 7.56:1 c/r engine, but retaining the standard head (ie no portied etc) is pointless imo, as it'd be laggier compared to putting a T34 on thats more suited to the engine and the characteristics i want from it.