i know you can get a 4.8 cwp with a f13/f15 kit..

will this be the same kind of ratio as an f20 with a 5.1??

i would imagine the f20 gearboxes have different gear ratio's so the 5.1 will probably equal upto about the same as the 4.8 in a f13/f15?

or am i just talking a lot of rubbish?