Rasing the compression ratio (adding more boost) is what increases both torque as it increases the BMEP (pressure) on the pistons. larger diameter pistons give larger torque for the same BMEP. This is ignoring anything to do with electronics, or cam-timing (dynamic CR)

Power = Toque x Velocity(angular). If you keep the same torque throughout the rev range you will get a straight line for the power. and so if you raise the revs but keep the torque the same (not normally possible) the you'll have more power. likewise if you keep the revs the same, but increase the torque, you'll have more power.

JAmes.

 

theyre not the same thing are they?

 

yup they are, more or less. since the gas is pressurised before it gets a squeeze by the piston your raising the max pressure before ignition. This has the effect of increasing the volumetric efficency, following to the OTTO cycle.

I think its about 3.74psi of boost increases the CR by 1. (might be 3.47)

JAmes

 

correctomundo defo the best i've used yet...and the figures are very very beleivable,exactly as you'd expect if you know what your looking at

they also do Autronic don't they.......

 

you can't just run more boost with the same turbo forever though, it will become inefficient

 

Boost will just end up being seen as the engine's reluctance to flow.