this came from Tufftys thread...
If you don't mind loosing fogs and having pipes on show then fit an ebay cooler like Welly has... no apparent flow restriction and repeatable results on the dyno... if you want to retain the fogs then essentially do a ****e load of work like S3 Paul did to get an ebay one in, fit and AH/Forge with 51mm outlets or wait and see 'if' I can get 60mm outlets onto the AH in which case you could have a chat with Alex about producing something similar...
Alex says the core is good for
400+bhp which will be where I am aiming for but thats not to say it wouldn't benefit being larger or deeper...
As I have said in the FMIC thread I started its really down to how much work you are prepared to put in to get something like this fitted and how much compromise you are willing to make as to what has to go...
For a K04 (std or hybrid) then I don't see it being a major problem as tbh they run on the edge when you try to get the most power from them... all the S3's dyno'd so far are very sensative to heat and they produce a lot of it when maxed... there isn't much a larger FMIC will do to help there, WMI is what you want for that...
My engine produces the same power on 1.5bar as it was at nearly 2bar but the difference is it runs cooler... this suggests that despite the turbo being able to produce the the airflow for more power, the components of the engine will not flow it... this backs up and produces more heat which pulls timing yadda yadda yadda....
To answer your question, going 60mm will remove the current bottle neck 'I' am experiencing with the FMIC, on a K04 you would not really notice it... but I will need to do the same (improve overall flow) on the rest of the engine components before I can turn up the boost a bit more and realise the potential left in my GT30... larger throttle body, large port head and eventually a large port SEM inlet mani will give the the full flow potential of the turbo and whack my power up a bit to boot...
< tuffty/>
and look at post #193 in the bit below. I based my purchase on this information.
http://www.audi-sport.net/vb/a3-s3-...y-forge-s3-fmic-image-heavy-4.html#post872642