[1speedbike]

Yeah... a chipped 135i will easily take a 370z, let alone a 350.

There's so much more you can do (easily) to a turbo engine to yield more power than a N/A engine.

Unless there is something wrong with your car, your friend secretly installed a blower or nitrous, or you suck at driving, there is no way he could win. You're putting at least 350 horses and 350 ft lbs to the wheels with a JB4. I just googled "350z intake exhaust dyno" and came up with 270 hp and 233 tq to the wheels. Yeah. No contest.