pointless modification..anyone who says that just fitting a larger intercooler made a difference is talking
cr@p.
I wouldn't say its pointless but there are better modifications to start with and an increased capacity intercooler isn't really needed till these mods are done...
need to do exhaust at same time, what goes in has to go out. You can not put more air fuel in than can get out............. it is called back pressure. One of several limiting factors for more hp
think your getting confussed on what an IC does, it only cools the air, fitting a larger IC won't actually increase airflow (although it will increase lag due to a larger volume between turbo and cylinders), the cooler air will be denser allowing more oxygen into the cylinder per stroke.
As for back pressure, well, back pressure doesn't really exsist, it is more about exhaust gas velocity, this is what an exhaust needs to be tuned for, it allows the pulse affect of multiple cylinder firing to provide a natural resonance in its exit that runs within the engines harmonics, basically its about having a large enough bore to allow gases out but a small enough bore to make sure there not still there when the next pulse of gasses comes through, you can't just whack a maassive pipe on thinking you will get massive power gains, its all very scientific...
'backpressure' is a term that seems to hang around but actually means nothing to do with what people think it is (it use to be more relevant for 2 stroke engines where fuel mixture would get pulled into the exhaust and then bushed back into the cylinder, doesn't work like this on 4 strokes though)
