hell got the 2.0l blacktop mk4 fiesta up and about, its running on the 1.6 ecu and 1.3 gearbox but i did the quarter mile in the same time the 1.6 did it and my friends mk5 zetec s beat me!

im not best pleased, it was just spinning off the line, my dads a machanic he said its the ratios, i intend to get it remapped.
Im just wondering what gearbox and engine managment should i use? any other advice would be great.