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Originally Posted by 3002 tii
They "owe" me a tune so I may ask for a map that's same as factory but with o2's turned down so I can pass emissions. I'm hesitant for a performance tune since I no longer have the weird idle. That's the thing with off the shelf tunes, n52 on z4 isn't same as e90. I'd imagine its same as the s54 tune for the m3 won't work as intended on the z4. Maybe down the road I'll get a custom dyno tune from Frank Smith.
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Probably a wise move. I know the S54's in the Z4 have a newer version of the Siemens ECU than the E46's and the same goes for the Bosch ABS unit. Kinda wierd they use different ECU's for the same kind of engine.
I did some research looking into the E90 with the N52 and the E87, they have the same version of ECU as the Z4's. But the N52 was used in many different cars so the ECU might vary.