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View Full Version : BMW E30 1988 M325i



boydus
10th-September-2007, 11:40 PM
Here is the dyno sheet from my BMW's first tune with the MAP-ECU installed..
The engine has had a few modifications:

M20 B25 Big valve head, ported/polished
288 Schrick Cam
New Valves rockers retainers, Schrick double valve springs etc etc...
M20 B27 Block, surface planed 1mm
M20 Pre-facelift high comp pistons
1.4mm head gasket
Custom made headers and 2.25inch exhaust
Cold air intake
Lightened flywheel
Close Ratio dogbox
Removed AFM for MAP
MAP ECU

Pretty happy with the result , factory the M20 was putting out 170hp @ the flywheel, but that was twenty years ago!! I would estimate it would be around the 140-145hp today..
Im netting about 200hp @ the flywheel and a truckload more torque which is where it counts :) The MAP ECU has certainly given this engine bagloads of midrange torque and superb throttle response! The punch when the big cam comes on @3500rpm is out-right amazing! I cant wait to get it on the track :)

bmw
14th-September-2007, 01:32 PM
Looks good. I'm nearly finished building a very similar engine for my 325i racecar - ported head, 288 schrick, 2.5 litre, extractors & mapecu. I still need to source bigger injectors. Are you able to provide me a copy of your fuel table? How is the drivability - were any parts of the table difficult to tune?