good luck dude unless you are using a safc-ii I've never seen a safc pull more than about 5-6 rwkw extra on a skyline... If it has been in conunection with other mods .. But if you get into the 12's great effort... no one esle has done it with stock turbo and intercooler...
Didn't the HPI S15 pull a 12.9 on the stock turbo?