going in a straight line requires traction on the ground... it has nothing to do with cornering... more rubber, less air pressure = bigger footprint of traction at every given moment... and if you have 1200 HP you need it all if you arent using complete drag setups..
Anyways... onto the real tech.. you said you have an intercooler... I guess you have a turbo, since supercharging would not make those numbers... or perhaps a dual setup? ... If you cannot produce slips on your times,.. the least you can do is tell us exactly what setup your using? What turbo? Intake, exhaust, tranny, compression ratio, pistons?.. new heads? higher strength springs and rockers? what cams are you using? How about fuel management.. that has got to use a lot... what octane fuel does it need to run correct? Also, most importantly, what suspension is keeping those tires on the ground... any chassis reinforcement? I would think it needs it with those numbers..
Please quench my thirst... mechanical enthusiast here that just loves those kind of numbers in cars that require massive tuning for that kind of performance.