[DGthe3]

Mindz the thing is, with DI you can start at a higher level and then build from there. Basically its just an ultra efficient version of fuel injection. figure if they are getting 450+ out of a 6.2L motor not designed for DI, they should easily get 400 out of a 5.7L designed for that tech. Now i would understand your point if you were going to add direct injection as a performance upgrade. But i doubt that very many would do that. You are very right though when it comes to engines like the LS7, or something that has forced induction from the factory or a number of other things. They don't allow much to be improved upon.

But think of it this way for smaller small blocks: if you have the same block dimensions but a smaller bore and stroke, that gives you more to work with not less.