A quick update. It may be the cold weather here in Seoul, Korea (around 1~2 degrees Celsius) or that the engine management system is finally getting adjusted to the pulley mod, but I am beginning to feel a definite difference in response.

Can't say it's pulling the skin off of my face during acceleration, but the engine revs MUCH quicker to redline in first and second, and I am beginning to notice some wheel spin during 1st to second gearshifts (with an Autostick!) Definitely an improvement since 2 days ago, when I felt as if I had just blown money that I could have invested in an engagement ring.. haha.

I am still wondering what kind of power gains (not manufacturer claimed, but realized by real-life X-fire owners) have been netted with a ECU / pulley (underdrive, not overdrive) combination. I searched on the threads, but nothing was really there to substantiate the ridiculous price of the ECU (Powerchip).

It will surely help me with my purchase decision. Thanks guys.