I had a JDM 207 with a Litchfield LM450 Billet on it which is basically a GT30 core with a stock position exhaust housing.
With 98 and 15% Methanol mix it made 504HP at the flywheel / 422HP at the wheels.
On a properly built and tuned engine you should piss 400whp with a GT30 sized Turbo. Especially if you run E85.
For reference Here's my graph. First is flywheel, second is at wheels.
