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Old 08-20-2014, 10:55 PM   #1
captain E34
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Join Date: Feb 2012
Location: Ottawa
Posts: 898
S52 turbo swap into E34 520i

Hey guys, i have come across an s52 motor and transmission that i want to use in my e34, i had my m50nv b20 setup with the tcd turbo and manifold, 42 lbs injectors, 255lph fuel pump, adj fuel pressure reg. Stock ecu, with moates emulator, bigger maf, etc... but i want to swap to something with more displacement and power.

So far i know i want to swap to obd1, which means m50 manifold and crank sensors, i will also be doing m50 fuel rail and everything else needed...

The problem i cant rap my head around is the vanos. My current ecu and harness is for non vanos. Which i wouldnt believe would work with this engine, unless i deleted vanos. Which im not sure is an option. (Searched with no hard evidence on how to) or do i swap to an m50 nv head an swap the cams and lifters and trays, into that head. Or do i swap to a 413 red label (i believe this is the one i need) ecu and harness to keep the vanos going, and just stick with what i have?

Either the outcomes would be...

S52, m50 obd1 manifold and all the trimmings, with 413 read label vanos ecu and harness

S52, with locked/removed vanos cams, on obd1 m50 manifold with current m50 nv ecu and harness

S52, m50b25 nv head, s52 cams lifters and trays, obd1 m50 manifold, current m50 nv ecu and harness

Are these three options, an accurate idea of what i can do? And does anyone have any opinions or thoughts on what else, or what i should do?
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1988 535i M30 (Turbo Build)
1990 520i Soon To Be S52 (Turbo Build)
1991 520i M50 (Beater)
1989 535i M30 (Beater)
1994 525it M50 (Beater)
2009 335i (Daily)
1997 M3 (Donor Car)
The Rest Is History...
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