I know on a SCCA scale with 1/4 tank a base model ZX3 with the 2.3L weighed in at just over 2500lbs. Do remember that the 2.3L weighs 50lbs less then the Zetec. So I'd guess between a base model ZX3 and a CSVT you're looking at around 400lbs difference.

You also have to take into concideration the torque of the 2.3L. When you think that a stock one is making low 130ft-lbs at the wheels and lightly modded ones at over 150, then you have a little rocket coming out of the hole.

Gears are killing these things though. We have 3.41 fd's, everything else is the same as the Contour though. So we have something like 19% taller gears then the Contour.

2004 Focus PZEV 2.3L - KW sport suspension, SP camber plates, Eibach front swaybar, FS intake, FS Stealth exhaust, 3.82 Final, Torsen ATB, Prothane MM insert, E1 CSVT wheels 1/4 mile - 15.201@89.4mph