When I see tests where they’re replacing some “ported” oe heads with some ootb Ede’s and they pick up like 50hp....... it just tells you how “good” their ported stock heads were.
The 906's made tq 500 rpm higher (3500 vs. 4000) but peak hp 200rpm lower (5600 vs. 5800). Very similar power numbers and both cars run nearly the same number.
