First there is no lag on a s/c. When the throtle hits the floor it's full boost.(crank driven). Turbos are exhaust gas driven which is why they take time to spool up they need the fast flowing gases to spin the turbo to make the boost.One more thing the s/c freewheels at idle and crusing speeds to be more efficient.I know I 've already said it but here it is again s/c have NO lag turbos DO. Here is the other thing s/c work with higher compression engines wheras turbos need lower compression which would mean I would have to change the pistons in order to achieve a lower compression ratio in my engine.
