Its torque that auto transmissions worry about. And a high HP NA build won't have anywhere near the amount of torque a turbo'd engine makes.
January 2008 Focus Fanatics ROTM
2003 Ford Focus ZX3 2.3l N/A = 221 HP, 162 ft-lbs, email@example.comMPH
2006 Ford Fusion 2.3l Turbo = 244HP, 247ft-lbs
duratec.wikispaces.com - Duratec Wiki - Sign up and contribute!