Quote:
Originally Posted by jksgoh
there were a few discussions on the diff between the 190/200kw engines and the 160kw engines. most people seemed to think it was largely due to the differences in the intake manifold and an ecu change? but nothing was ever verified of course...
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It is verified now.
Euro N52 speced engines from 2008 on differ in ECU only.
Earlier engines (and possibly engines that go to US) had/have difference in intake manifold.
I discussed it with BMW serviceman and at least for Euro, with software change 272HP is immediatelly reachable.
In US, you should talk with some expert in BMW to confirm that intake manifold is same like on Euro 125i or X3 (I think it is so).
Reaching 300HP doesn't require turbo at all in my country, as swaping cat/mid exhaust with straight tube and adding proper silencer do a lot (20 HP at least, more than 30HP on 135i) + intake will do the rest.
Such engine is real N52 beast without turbos and touching vital engine parts.
For bigger appetites, one should obviously start with 135i.