Abdul, there may be something in the pipeline with XO tuning but it's still work in progress as far as I'm aware.
As a tuner myself, all I can say is keep your expectations realistic. If your car is normally aspirated, even with a Vtec, the best you can hope for is sharper throttle, higher rev limiter and some in gear torque through advanced timing. The gains on NA cars are quite limited, but for most people still pleasing.
The reason the diesel cars are so popular for tuning is due to the fact they are turbocharged and any forced induction car will always get a fantastic gain..