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rumors and such....
Posted by Ed S (more from Ed S) on Fri, 20 Jun 2003 09:16:21
In Reply to: better ECU for 85 900t ?, JJ, Thu, 19 Jun 2003 19:05:36
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LH2.2 turbo ecu's (which are at home, not with me at work)
my car: 1985 900t sedan
last three numbers???
0 280 00 515 early
521
533
537 later
I've heard that the 537 have a better cold-start, less lean at start-up than the 515. I've swapped all of these in/out so many times and I could not tell. Needless to say the 537 is in the car now. I've also used a 538 which lists for a non-turbo. Worked just fine. YMMV.
My opinion is that the head design/cam issue has more effect than the ecu, see site below for fuel curves. Otherwise the ecus look all the same. Maybe a volvo would have a fatter curve(extra mass?), but who knows.
Further info here, nice graphics which show actual fuel curves:
http://www.scotsglen.com/saab/ecu/
Ed S
posted by 208.148.189...
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