hi, can i just ask or makesure, the 8-port engine, the only physical diffrence is the fact it has 4more exhause ports, this make the engine faster because it allows the exhause gasses to be expelled faster than on a standard engine. this is in the same way like a 16v engine on a 1:1 scale car or a 20v engine?! the exhause fumes go faster there by making the time taken for the piston to move back up alot faster, thereby making the momentum of the engine generaly faster.