> > I have done 2 cars like this, the 87 port fi car was not bothered > > by the boost- no errors or lights. The 93 was a different story. It > > Was the '87 car a MAF or MAP based engine? > The 87 was a MAP based car. Believe there was no trouble because that early system did not check that a particular MAP value was within a set of boundries. frank >