Originally posted by MotorCity: Of course that would be within the margin of error for the dyno. Although it could be an actual increase as well. I am sure it looks a whole lot better too.
a - I always make at least 3 passes when checking for gains/losses for a mod.
b - I dyno'd on the same day - before & after
c - I always use the same dyno, in the same shop, strapped down the same way, same wideband O2, etc.
I'm not arguing that a dyno can't be wrong or that this mod is in any way a real increase in power, but if I tell you I dyno'd a gain you can take it for what it's worth. I mean - sheesh - my Zetec's only made 170+ passes - we are familiar w/ the ways of the dyno
