Quote:
Originally Posted by IMOA
What you're looking at is a different intake manifold with different length runners, different cams and to a lesser extent headers. You have to understand though that to close that hole you are going to be taking power from somewhere else. This isn't a 1:1 kind of thing but ultimately the parts have been designed to have maximum efficiency at a certain point in the rev range so to improve the efficiency in a different point you are going to gurt it somewhere else. What I would expect to see is some cams and probably new intake manifold which will be optimised for mid to high range so will fill the hole but also knock off the peak from 2000 - 3000rpm.
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This was my original thought with the torque dip, that they had maximised the bottom and top ends and did their best with the mid range which had to be a compromise. The only other option would have been to reduce the power in those areas to give an even delivery. Clearly this is the best option in a sports car that has budget limitations
You only lose power elsewhere if the changes are fixed. Variable solutions will work and maintain power throughout the range, they are just difficult to implement and the best variable cure so far is a turbo.