i dont know about beating porsches,
but i can beat a wrx in my vr,
stock for stock.
its dumb hard to launch a wrx, without destroying your tranny,
whereas a vr has torque to get a jump.
ive beat 5.0 stangs, for the same reason,
launching...is key.
im sure you have seen newbies with cobras, only running 14s or so..because they either have no traction or bog...
and yes, it takes a lot of money to get a watercooled vw into the 10s, and forget about the single digits...that takes sponsors.
the fastest vw on the planet is owned by a couple of friends of mine at c&m performance.
the world record is 9.69
c&m performance ran 9.692 at Fall Show n Go...in their tube frame jetta.