Originally Posted by pinky2252s

Alright, so after my engine dies in my Matrix i want a .21 engine so i can race in the "pro" series at my track in stead of (because of engine size .28, dumb huh?) the "unlimited class".

So the track i run at has a 150 foot straight but usually (the track changes every year) its full of tight twists and turns and short jumps. so i need a low end engine. and i have a question, does more ports mean higher top speed and lower ports mean higher low end?

I was thinking the GO .21 3 port. If my theory is correct, The 3 port is low end, the 5 is md range, and the 7 is the high end. Right?

Thanks