by Manaz » Tue Jan 21, 2014 7:18 am
As I understand it, you can get a Kido tune for somewhere under $500. That'd be a great start. Matt allows retunes for upgrades then (to a point I suspect - if you did a turbo replacement and a full TBE and a new TMIC or even a FMIC, that's some pretty serious retuning work to do, and he may charge something for that (or he may not, I won't speak for him). I doubt you can beat a tune in terms of bang-for-buck though (especially if E85 is available to you, though that generally requires injector upgrades too).
If you still want more power after the tune, an exhaust is probably the upgrade to give you the biggest improvement - full TBE by preference, though I believe just a downpipe can have a substantial impact. After that, power increments are relatively small unless you replace the turbo itself.