I'm not saying its a walk in the park but if a tuner is worth his salt should be able to tune a turbo 2.5 six cylinder on some form of engine management.
I agree, there isn't many M50 turbo engines or to be honest not many relatively standard M50s mapped in Ireland but there's feckall S50s done properly too really and standalone management costs far more for them if you want a lot more power.
S50 is the obvious choice for an E36 and especially an Evo as the whole car is ready to go and you can easily get upto 340bhp without too much work but fitting an S50b32 into an E30 is quite abit more work. Exhaust manifolds are a complete pain and you need to get a new M50 oil-pump, E34 sump, moving the brake servo over etc.
If you want around 300bhp which is probably more than enough for any track in Ireland, the S50 is brilliant. V8 could possibly be cheaper when everything is done and fitted in an E30 but my point was just if you want alot of power 400+ from an BMW engine for relatively little money, an M50 turbo is hard to beat.
I prefer NA too in fairness and I'd nearly go to the trouble of getting an S85 before turboing an M50 or any other engine but its just a point I was trying to get across :)
