Sluggish acceleration for 1.6 EU
I've just bought a 2004 1.6 (Z6) manual European Mazda 3 with 200k kms. My biggest problem is that the car feels extremely sluggish, especially coming from a 323 / Protege 1.6 2003. I've downloaded a "dyno" app called PerfExpert (and spent an afternoon looking for details like gear ratios and drag coefficient).
I've done a dozen runs today, deleted the obviously bad ones (where it thought redline was under 6000 rpm), and looked at the results. The surprise is that the car can still do close to 100% of the factory specs! 105 PS / 145 Nm.
Here are all my results (one is with AC on, it takes -15 PS from engine power!):
Even if the car is OK at peak performance, under 3000 rpm acceleration still feels extremely bad. Or at least it feels like that especially compared to the 323 / Protege. What can I do to make it more powerful in the lower half? I'm thinking of replacing spark plugs and possibly the MAS sensor.
Does anyone with a 1.6 BK has any dyno results or is willing to do a few runs with PerfExpert and share them? I'm really curious if my curves look OK or not.
BTW, what is the official rev limit on the 1.6 Z6 engines?