Quote:
Originally Posted by Stef
What upgrades are people doing when they do a "FBO stage 2" on their N55 M2? my guess is there is no consensus, but what is the general, mostly accepted definition for "FBO stage 2" which I read about here and there?
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1. The charge-pipe needs to be addressed before you do any mods, as it'll blow even with stock power.
2. A down-pipe, intercooler and tune are considered to be FBO.
3. The boost pipe, inlet, and diverter valve are extras, but most consider them worth the trouble/price.
4. If you plan to use a 93 OTS tune you are required to do a few logs to make sure your fuel pump is keeping up. On some cars it doesn't, and on others it does, no rhyme or reason. If you don't do the logs you are taking your engine in your hands. If you do the 91 OTS tune you're pretty safe without the logs, but they are still preferred.
The 93 OTS map with the other mods should get you 430 hp and 490 tq, and the kicker is that your throttle response and turbo lag will feel worse than stock, even if they're both better. For most the extra power is worth it.
If I had it to do over again I'd do a charge-pipe, Fabspeed sport cat, boost-pipe, inlet, and DV + custom tune, but I don't track my car or suffer from hp envy.
Lastly, make sure to do your research on which parts fit together easily, and which ones don't, because that's a thing.