VW's latest generation 4 cylinder turbo engine, the 2.0T, has an inherently awesome VE (volumetric efficiency) curve. In fact, it is so great that it is just cause for all new, from the ground up testing in search for the proper matching turbo.
Why such a "large" turbo as a GT3071R? An efficient turbo to match an efficient engine! It's a great match! You could go smaller as usual but you'll choke up the engine in the higher revs!
After countless test sessions, all the data shows the GT3071R allows the 2.0T operate very close to its natural efficiency curve (to develop HP as the revs continue to climb to redline). Not only that, but it's able to do it without sacrificing low end drivability. This allows us to run the full scale 60mm turbine wheel on the GT3071R coupled with the highly efficient GT/T3 VB exhaust housing (which ensures proper engine breathing at the mid to high RPM range to make excellent HP) to gain peak efficiency and STILL have the ideal low end power bandband for everyday street use. That's right, with this new engine, you can have your cake and eat it too! Big power and no lag. You will NOT have to resort to the smaller turbine wheels with smaller exhaust housings just to get the turbo to spool up quicker, but at the expense of higher backpressure numbers and higher EGT temps which subsequently kills peak power to the point where you will have to turn your boost levels much higher than necessary to make good power. By using an efficient and well matched unit like the GT3071R to do the job, you can make the desired power more safely, reliably, and best of all, effortless (with less boost).
Note: You are recommended to source a fueling/tuning solution to compliment this turbo kit.