Quote:
Originally Posted by wdb
Yep. That, plus no mention of a change in tune, left me skeptical. Hence reaching out to this august group. 
Thanks also for the additional information regarding the intake clutter. Very enlightening.
I did some more research on the 360 HP flavor of the S54. Among the differences are changes to the intake, but I did not find details on that yet. However the big thing I read was that the cams are different. That makes the additional HP very plausible and explainable. |
That's the FIRST I've ever heard of it.
E46 M3 S54 inlet CAM shaft PN: 11317833223
E46 M3 S54 exhaust CAM shaft PN: 11317833225
https://www.realoem.com/bmw/enUS/sho...diagId=11_3006
Z4 M S54 inlet CAM shaft PN: 11317833223
Z4 M S54 exhaust CAM shaft PN: 11317833225
https://www.realoem.com/bmw/enUS/sho...diagId=11_3006
Unless my eyes deceive me, there's no difference in PN for the Z4 M S54 cams?
I don't want to burst your bubbles, but I've done back to back pulls between the S54 in the E46 M3 and the MZ4 Coupe on track (twisty kind, not the straight kind) and the S54 in the MZ4 Coupe is not stronger. In fact, the engines behave almost identically, the only perceivable difference is the fact that the MZ4 Coupe is significantly lighter.