mine is a stock 207 donk with stock STI top mount. I dont mind what power it make as long as it over the 210kw and 400nm range I'd be happy.
I would love to crack 300 with a 37 but highly doubt it - at the end of the day its just a dyno figure.
as for boost probably try to push as much as possible >1.7bar close to 2bars but see how it all goes, car just gone over 100,000km
been running 1.6bars for 3 year
on 3 diff turbos and numerous track days.
CBf going to 10 diff workshop then putting it on a trailer or towing to another to get it tune, as ASG are the only one that can tune my car so might as well get them to do it - plus they been working on my car since day 1 and Im a lazy prick to DIY.