anyone know the top speed of a S5 TII? also wondering if my upgraded turbo would affect my top speed... I got mine to 145 before letting off but it was barely going up after 140 so I don't know if that is about where it stops or not... any clues?

gimme the tire size, the cars redline
the 5th gear ratio being .719 and finaldrive 4.1
we could calculate the theorical top speed of a car that can redline the 5th

http://www.f-body.org/gears/

i heard something like 155

redlines at 7k and the tires are the stock size, I forget what that is

also, the GTUs rear end is capable of a higher top speed correct?

top speed is 175 according you go thru the gear

GTUs rear end has a higher numerical ratio so it would give you better acceleration. does the ring gear fit onto a turbo rearend though?