I have just done a quick check , if you search for this part no you get a cross reference from lucas site here http://www.lucaselectrical.co.uk/cat...8_crossref.pdf to it being a SEB176 .

If you then look here http://www.lucaselectrical.co.uk/cat..._technical.pdf and find SEB176 it states its range is 15 to 102 kpa

looking elsewhere this means the range is 2 psi to 14.7 psi and remember that we live with an air pressure of 14.7 psi all the time this would suggest this map sensor is not able to measure any positive pressure ie boost .

Sorry to say that this looks like the std rs2000 one .... whilst typing this remembered I had a XR2i one , its no is E7EF-9F479-A1A and it also goes to a SEB176 so that is kinda conclusive , I have got the turbo no somewhere , will look it out and post it later