I've been doing trackdays for about 7 years now and my engine has done 132,000 miles and never been rebuilt, like others have said cooling is the main issue and an oil cooler is needed 100% ;-)
I'm running a standard turbo at its limit so probably around 320/330 bhp. I've got a uk spec radiator (thicker than the standard jap one) and a 19 row oil cooler and oil temps rarely go above 100 degrees even in a 20 min session.
I only ever use mobil 1 motorsport 15/50 oil in my engine too, yeah its expensive but not compared to an engine rebuild ;-)
I'm running a standard turbo at its limit so probably around 320/330 bhp. I've got a uk spec radiator (thicker than the standard jap one) and a 19 row oil cooler and oil temps rarely go above 100 degrees even in a 20 min session.
I only ever use mobil 1 motorsport 15/50 oil in my engine too, yeah its expensive but not compared to an engine rebuild ;-)