First off you are not goin to make 400whp without changing some of you internals, Apr stage 3+ is about 5500 and that is goin to give you as they say 333bhp on a gt28rs which is alittle low from what i have seen a gt28rs do (Tomritt). A gt28rs with the supporting mods like downpipe, MAF, manifold, fmic, clutch, high flow or cat delete, ecu/standalone, ect, should give you over 300whp on 93 oct. Also you are gonna want to do brakes and some suspension work to make it safe. I am not an expert by any means for that talk to Tom Ritt or head over to audigeeks.com and post in their b5 fourm those guys know alot about the 1.8t engines (bitterchild, mikep2zero).

 

I have just the APR 1 on my B6 now , but I am getting the TT225's for $300 (used) and am going to be going 1+ in a bout 3 weeks.

I CANT WAIT !!

 

Well, you make it sound like once you've finished your shopping list, 400whp is as easy as a night in the garage. The software (your chip) is kinda an important detail that has been tricky for many people. I don't think a fuel rail is strictly necessary, but I might be wrong. Also, you will need a new exhaust manifold. Not so much the SS. Probably you'll want a boost guage, as well as EGT and a wideband O2 sensor, especially if you're doing this yourself.

 

Well all these parts wont be plug and play. They will needed to be tuned and all before u can make close to 400whp. Can i ask why u would chosse a a4 1.8T to do this to? Is it gonna be a daily driver?

 

first off whats an egt and a wide band o2 censor...i know what a reg o2 is neva heard of a wide band.

i like the way it drives looks and the great feeling i get when i say ya thats my audi over there......that and i wand the ultimate sleeper

 

o hahaha, nice, i love having an audi too, plus with a s/c i would have a pretty good sleeper also.