Help me upgrade this beast.
Last edited by sault11; Jun 12, 2014 at 07:17 AM.

1. Get a tune. (Hear good things about OE, Eurocharged, and Weistec)
2. More Exhaust work - Full tube headers cat-less
3. Supercharger from Weistec.
4. Wider tires (Order them in bulk)
If money is not an issue, throw out that 6.3 NA engine, put in a twin turbo V12 from an S/CL600, put in bigger turbos, tune THAT engine, then you'll have a real "upgrade".
Here is an E55 with the V12 tuned motor:

You also don't know much about the M156 if you think a tune alone is going to get you 5-10HP.
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Read this so that you don't think that I pull things out of my a$$:
http://www.b(delete this)enzboost.co...-91-octane-990
This is not rocket science here. I highly doubt that AMG limits their engines and leaves aftermarket companies room to develop 50-60hp more by simply adjusting ECU. If that were the case, I'd say AMG owners were being ripped off and they should file a suit. If you want to believe marketing campaigns, be my guest...
I've yet to see a naturally aspirated engine gain serious power numbers just by tinkering with ECU.
Sure, once you add headers, forced induction, exhaust, you will want to get a tune to get the best bang for your buck. But like I said before, buying an ECU tune on a NA engine is a waste of money IMHO.
Last edited by 06E5004ME; Jun 12, 2014 at 09:05 PM.
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