Are cylinder pressure and boost pressure inextricably linked

[darrenjlobb]

I think its important to note here, that the whole "more flow as less psi" thing is kinda missleading, and people dont really understand...

For as long as you dont change anything on your engine (cam / head / ports etc) then there is only so much air you can flow at a set pressure, changing the turbo wont change this....(it will due to exhaust back pressure etc, but ignore that for now)....the reason people make more power is more due to the fact the turbo is making its pressure higher in the rev range, hence making more horsepower....its only now, because your doing MORE rpms, that your flowing MORE air at the same psi, and making more power, not just the same setup / same rpms somehow making more power and more flow even though the pressure is the same....

And yes, boost effects cylinder pressures massively...as does compression ratio and injection timing / quantity....