what series STIi is it ?,
AFAIK the series 2 and 3 are close loop systems, then they went open loop, its something to do with lubrication , i think.
ill ask me brother, he has a 400bhp 95D sti ( closed loop ), series 2 or 3
this is now thought to be one of the best engines for tuning, f**KING animal of a car, he has never had problems with this, but lots of part were upgraded during increase in power, there is a generic sti problem with one of manifolds if you increase power too much, this is due to uneven manifold lengths, and can cause pistons to melt and cranks to seize, can anyone elaborate on this ?