Quote:
Originally Posted by m3alabama
I don't get why even with the 3 stage and the tune, no aftermarket tuner was ever able to replicate the stock 330i (255hp version) horsepower delivery curve which ran strong to 6750 where it peaked power and would pull strong to redline at 7k. STock 328 engines with the 230 hp always ran out of steam after 6200 which made sense with the single stage manifold but wondering why AA or anyone else was unable to get more of the top end power that the OEM n52 255hp model does from the factory.
Really goes to show you the expertise of bmw and their skill in extracting power
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To answer this question: The 328 uses a little different ecu than the 325/330. We can definitely exceed the 330's 255 bhp on a 325 with 3 stage.
This vehicle in question made a max of 260 bhp after mods.
On our in house dyno our 328 showed no hp drop up to 7000 rpm. I think the dyno operator may have set the dynos max rpm to around 6500 or so.