Ok, I have finally narrowed it down to a GT28RS or a GT2871R. If I buy an aem wideband, what ecu software should I get? I have a buddy who can dyno tune my car as long as I have a wideband. What injectors are needed or reccomended? Do I need a 4 or 5 bar fpr? 2.75' dp back exhaust or 3'? FMIC, do I need one? What else is needed with these setups? I'm trying to figure it out price wise and start gathering parts.

 

yes you will need a FMIC

71r will have more lag, but make more final power... depends if u do mainly highway or city driving...

i know several b6's with the 70r running revo software... check with them, i think ecode can tune the file more specifically for the 71r

 

2.75 is about the minimun you would wana go. go with 3" and let it breath a little more.

 

Send Email to Unitronics. They're good at chip for BT setups.

http://www.unitronic.ca/uni/

 

it all depends on the tune they do as well.

Unitronic mainly has 440 and 630 cc injector tunes, but it all depends on what you pick.

also, you can't go with revo because they don't have a bt file for the B5.

to complete the turbo kit you'll want:

fmic
injectors (depending on the tune)
3" turbo-back (2.75 is good but 3 gives you its full potential)
clutch (don't need it right away, but your stock clutch wond be able to handle it after awhile, i recommend southbend)

 

You are not going to see any real differece from a 2.75 - 3" exhaust but dB level. As for the increase in lag, its going to be all of 200rpms since the turbine wheels are the same and the compressor wheel is slightly larger. The 2871r will make 15-20whp more at ~20psi and still have the potenial to run 30psi and make high 300whp on race gas. This would be a good time to buy a real fmic and not a ebay kit if you plan on going 71r. 034motorsport just released a nice one at a reasonable cost that would suit your needs. And yes, unitronics is the way to go, 630cc's min.

 

is the unitronics pre-tuned for whatever setup I get? Can I hook up a wideband to it and have it dyno tuned?

 

the 630 file will be great out of the box and not need to be dyno tuned.

 

really? Does it self adjust to mods? Or do I have to give unitronics all my current mods and they tune it according to that?

 

well, the 630 file will be programmed to think you have the mods mentioned above, you won't necessarily have to tell them all your mods.