Quote:
Originally Posted by 3GFX
The majority of my search for power has been largely sad and discouraging. I have an M54B30 motor in a 2003 Z4. I can say that I am actually happy with my finals results after much contemplation on if I should do any modification at all.
My mods consist of catless headers, Dinan muffler, panel filter and a Eurocharged tune.
My stock crank hp was listed from BMW as 225. I dyno'd at 229 wheel and the ecu was still adjusting. with simple loss correction I'm making roughly 270 crank. I mostly notice the correction of power delivery under 2500 rpm.
I would recommend headers and a Eurocharged tune all day.
Dyno attached only shows gains after tune. I don't have a dyno pre-headers and filter.
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Those are healthy numbers, but you're leaving some power on the table - a good exhaust, intake and underdrive accessory pulleys (as well as a mechanical fan delete) can really put you over the top with extra power everywhere and no downside. Expect an additional 10whp+ PEAK when all those are done.