http://www.perth-wrx.com/vb/mechanic...ce-thread.html


Try this
This will give you a spread of what's been tried and tested and what power were obtained

Not sure if you're asking for 300hp or 300kw atw

Too much power means more stress on other parts apart from the motor, like gearbox, drive shafts, etc
Plus, unless you're using the power on a straight line or....trying to get the bitches wet