http://tdiclub.com/TDIFAQ/TDiFAQ-6.html

This is the best and most informative site i've found.

i used it to tune my A4 cheaply and with good results.

If you are handy with vag com theres gains to be had for free.

I'm a member on there too, and can usually be found trolling around the "TDI Power Enhancements" section seeing how the U.S guys do it.

I'm a member on there too' date=' and can usually be found trolling around the "TDI Power Enhancements" section seeing how the U.S guys do it. [/quote']

Me too

What free gains?

What free gains?

I suspect the EGR shutting off is one such gain, which is a guide on TDIclub, but also a guide exists on Briskoda as well for how to do this.

Not sure on other gains that can be done on vag com alone. You can make the car go "beep beep" when you unlock it.