how much horse power can the audi 225 handle say if it was stroked and big turbo

Im not sure exactly how much HP you can throw at it, I think it withh handle quite a bit. Heres a link to the Audi forum it should have a good answer for you. http://www.audiforums.com/forum/audi-tt-7/

http://www.iseecars.com/car/2003-audi-tt-horsepower

youre defiantely going to need some transmission work with that much power and since its a haldex awd system. meaning if the computer fries, its only front wheel drive which happens alot in these cars without even big power. with that setup expect about 450awhp

Forged bottom end a upgraded fuel pump prob atleast 660cc injectors I’d go 1000cc for future tuning, with a adjustable fpr for different tuning setups. The haldex should be okay with anything under 500hp as long as you aren’t doing 7k launches or donuts like a idiot subie owner. You want a nice fmic and possibly a IE intake mani, other companies make similar style manifolds I believe their 2.2L plenum size. Find a good dyno tuner or a good company that has a premade map (unitronic,giac,)

Haldex has been known to handle very good power so I wouldn’t be too worried. With that kinda power on these cars assuming your in a mk1 TT your gonna want a pretty expensive set of coil overs, big brake kit for sure I’d go with some thick ass aftermarket sway bars and links strut brace and some wider tires to keep from killing yourself when your doing 160mph lol people will build crazy fast cars and won’t do brakes or suspension and I don’t get it .. stopping is more important anyway