Please note I have no affiliation or experience with dealing with any of these comapanies aside from a few of e-mails and forum messages, however these two cropped up as two decent places :
R-Tech:
R-Tech have some interesting remaps - their stripped down site with just the tables of results are at
bigbhp.co.uk: 216bhp and 422Nm for the 2.5TDI180 for £250.
Chip'n'Spin:
I was thinking more along the lines of
Chip 'n' Spin (
on this forum) - if you go to one of their RR days (e.g.
30th May 2009), they do before and after RR runs with a choice of remaps for £250 for Audi-Sport.net regulars!
E-mail content from Mark (at Chip'n'Spin):
We can offer you Eco (30hp 60nm) fast road (40hp 80nm) or race (50hp 100nm)
and...
With the high remap you may loose 1-2mpg, but depends on how you drive. The delivery is more linear and you'll have more power throughout the rev range.
Last remap day 180 A4 we done was 230hp and 325lb/ft [440Nm] and no issue reported and must have been running 6 months now.
All of our remaps are well within the limits of the engine.
Only caveats worth pointing out: he did concede that although well within engine specs, the clutch would take a bit too much strain if you were trying to use all that extra torque for traffic light grand prix starts.... and it was also recommended NOT to go for the higher remap on the Tiptronic(Auto) boxes, but with manuals they should be fine...
Ya gets what ya pays for.... NOT!
I've previously had some fairly expensive remaps done (on the Golf, so low returns, since it's a NA & petrol) at AMDtechnic back when they were based at Bicester and although I don't really blame them for not caring too much about what was then a 7yr old Mk3 Golf, the fact was I was paying pretty serious money for the work and despite promisng to do before and after remaps when I got my high-lift cams done, they didn't do either of them and despite charging nearly double what most other semi-custom remaps cost, their "custom remap" is also a semi-custom remap (based on previous cars) - it's just a spreadsheet where they plug in the spec's of the car, then apply that pre-defined remap, so if they got something wrong and didn;t dyno it, then the remap would be useless*. After I complained and they said I although they didn't have the space that day as they had a new RS6 to work on, but if it meant that much to me, I could bring the car back again for another run (despite knowing full well that I was driving over from SW London and then catching the train back to London each time I left the car with them)... I duly dropped the car off with them about 3wks later to have the rolling road session done again.
When I picked the car up about 3hrs later... they flapped about for a while trying to find the dyno chart and eventually "printed off a new one".... which was for a chart for a regular remapped 8v GTI - not only did it have far lower torque readings across the scale... but the torque curve on the remap they gave me dropped off more sharply and well before my PRE-cam'd engine did (and nothing like the way the car actually drives)... clearly NOT one with the air-flow work that mine's had, much less the high-lift cam version!
When I pointed this out - they just said they said that when they printed it, they thought that was the right chart for mine, but given the work it had done, they conceded that it was probably not the right print out: then the same old spiel: "although they were a bit too busy that day to fit me in 'agai', if I wanted to bring the car back in a couple of weeks, they could re-dyno it."
I left.
*RE the remap without a dyno run being useless: Since the AMD persistent lack of care for any cars worth <£50k, I took the Golf down to Minispeed @ Brooklands Horse Power in Surrey (ironically just down the road from the new AMDtechnic base) and they rolling roaded it at about 120bhp: I'd lost some torque at the lower revs (as expected with the new cam), but my fuel pressure regulator was playing up over 5000rpm ("not broken, but certainly not quite right either" was teh diagnosis) and although it was still pulling cleanly to 6660rpm, the engine couldn't get enough fuel, so the power curve was FLAT (like somebody had drawn a ruler across it) at about 120bhp from about 5000 to 6500rpm! Apparently the car was running "very, very lean"... something that AMD would have picked up immediately if they'd every bothered doing the last two promised dyno runs.
One new Filter Kings "Power Boost Valve" (fuel pressure regulator) and a rerun on the same dyno and suddenly I was dyno'ing 140bhp @ 6250rpm and there was an appreciable surge of torque from about 3000rpm right through the range that was previously missing...
erm.... whoops.... did I go off-topic with that rant?? kinda, maybe
Will need a cambelt too.
Based in Manchester. I'm not sure what they quote for the 2.5TDI as it's all done to your car on a dyno. 
