I have a lightly modified GTR as you say, exaust, bit more boost etc..
couple of mats have ~220rwkw 33gtsts...
MSPEC (he's on here), if i launch, he has no chance, i get a good 3 or so car lengths on him, and its all over... when he launches and i dont, he beats me over the 1/4 by about a car length or 2.... rolling in 2nd gear as you say, i generally pull away slowly, i think because i have longer gears, 8000rpm shift as opposed to his 7000rpm...