2.5" should be plenty for your needs... i use 2.75"ID IN and 3"ID OUT to prevent pressure loss in the core itself and assist through flow. GReddy does this with their FMIC kits to begin w/ (the inlet is smaller than the outlet)...

wouldnt a electronic boost controller help build boost a little faster with a FMIC??

When doing things I always try to do them as good as I can manage.

That means the mechanical setup has to be to my liking befgore I actually consider alternatives.



That way I won't find myself limited by the stuff I already did when trying to work my way up to more power later. Kind of is an economical consideration really. This means that by spending an extra few hours in research I will avoid having to replace stuff later. Furthermore, I'm not that fond of electronic devices trying to patch up bad constructions (not generally bad but maybe not ideal would be a better way of describing it).



So with the turbo, to mechanically avoid lag I have to do my best to keep the intake side of the system as short as possible, yet still place the intercooler at a place where it'll catch plenty of fresh air. Or at least, that were my initial thoughts on teh matter.



I'm currently trying to weld up some pretty neat piping for the intercooler.



(that won't mean I will not add an electronic boost controller. I probably will do so anyways.)

A boost controller can work to adjust the lag to an extent, you might even be able to eliminate the added lag from the FMIC all together, but that will depend on your turbo and fuel setups. If you have an upgraded turbo (even a stock upgrade one) you can get the boost to come on a little earlier w/ a boost controller...but you have to make sure your not running lean at the lower RPM level when you do that...

At the moment I have all the basic maintanance done. Spark plugs replaced, fuel lines and electronics refreshed and the likes.



As for the first set of alterations/additions to be made I was thinking of the FMIC, fuel controller, bigger fuelpump, Corksport ECU, BOV and porting the wastegate on the stock turbo.



I'll see that I get that setup to run properly before adding a boost controller, having a look for the need for larger fuel injectors etc.