Really ??? if you were to run your FXT over the scales and then Run the STi over the
scales right behind you ..... Youd see were your car length came from real quick. 4 cylinder engines are pretty sensitive to extra wt. And your pushing alot more wind than the STi is also. That all adds up real fast. It makes total sence that STi pulled you out of the gate.
And the faster you go ??? the worse its going to get for you. Just sayin. The tune is probably just fine. Here's an example of wind and weight and what a difference it makes.
This is first hand. My 67 Camaro ran 10.0 with a pretty good running 355 small block chev. In it. I took the same engine and put it in my rear engine dragster. Right out of the box I ran an 8.10. Almost 2 seconds quicker in the qtr mile with the same engine.I lost
over 1000 lbs in wt and lost all that wind resistance. When from 123 mph to 168 mph all with the same engine. So weight and wind are everything as far as cars and engines are concernd.