I'll get there but I was hoping that you guys could help me confirm the order of mods I posted above. I used to be auto so there was no point in lightening my tailshaft but I'm manual now so there's no reason why I shouldn't do it. Maybe I should do a Bass Junky and do them in opposite order just to test the effect...
Ahh I get it now. Your inertia helps you up the first bit of the hill - or the whole thing if it's small enough - which saves fuel, but without this inertia you need to be straight onto the gas.
The response I'm talking about is the transition between off the throttle and back on. Ie; coasting along then plant your right foot. How long does it take to get up on boost? I can tell you from my experience that in this one area, a smaller intercooler is better.
I think the total volume is the important part here.
On the stock R34 there are already holes in the inner guard lining behind the cooler for this reason. When I put an oil cooler in the opposite guard I cut the same holes in that lining. Some ducting that lets no air escape the cooler would be great too.
The only other thing to consider is the heat sink aspect. How long are you going to be on boost? Will it be long enough to completely saturate the cooler with heat? I don't know but it's worth considering. If this was a drag racing thread then no way would it be good enough, and probably not on the circuit either, but street - probably.