A turbo can basically make up for a crap manifold by replacing port tuning with forced induction (as my own car is a testamony to).

Tuned induction on top of forced induction is the way to go though. Not only will it help fill the cylinders under boost but it also helps when off boost.

Its the main reason why I am switching manifolds on my 930.

https://www.tamparacing.com/forums/s...hreadid=199732

People manage to get over 500 HP from the stock 930 manifold but I am also concerned about improving my total power band and system efficiency.