Have just upgraded the turbo in my MY 95 WRX wagon from a td04 to td05.
Also changed the B3 ECU to a Z4 unit. Easy swap to do and all went well.
The issue I have is that the boost (as measured by boost gauge) hasn't changed. It is still producing around 10 psi dropping to around 7. The same numbers as the td04/B3 combination.
I haven't changed anything else so the MAP sensor and boost control solenoid are stock for the wagon. I presumed that these components would be the same as fitted to a sedan (where you would normally find the td05/Z4 combination).
I intend on taking the car to a mapper - would the mapper be able to achieve the 12.7 psi boost target that you would normally expect from a td05/Z4 with the existing components or will I need to use upgraded ones?
Any other suggestions also gratefully received!
Cheers
Andy
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