FWIW. My Mystake ran 16.9 stock on the track. This was run with some other friends in their Duratec's. They were oulling times of low to high 17's for comparison. One of those cars we later a tune up on and it ran a 16.9 as well. Based on this I would say on the same track with cars in similar tune that the times are in fact very close between an ATX Duratec and a MTX Zetec. As for an ATX Zetec.....
(without forced induction
)
