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Originally Posted by ///M˛
FYI, we are AKI in Canada.
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I stand corrected. Tells you how often I travel to our neighbors in the north.
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Originally Posted by Dasnub
This was exciting until I read I have to switch maps at a dealer. I have plenty of access to 93 octane but there are times I end up in an area with only 91. Wouldn’t want to end up stranded unexpectedly... how far could you drive the car (taking it easy obviously) without having to be too concerned?
Also, whatever happened to the whole “the N55 is tapped out?” thing from Dinan themselves? How much are we affecting long term reliability? Is this really possible without even an intercooler upgrade?
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If you arent bouncing it off the rev-limiter and doing full obnoxious pulls or anything there is little concern of using 91 on the 93 octane mapping for a tank of gas. Is it ideal? No, but as long as you don't abuse it you should be fine.
In stock form the N55 M2 is pretty close to tapped out. 2 factors are the primary contributors to this-- the turbo and more importantly fueling. A larger turbo and intercooler will definitily help the top end and improve efficiency for some additional power, but only to a point. The car is more fueling limited then anything. Fueling with DINANTRONICS was indirectly controlled (and limited in scope) so there was little gain with a piggyback itself (stage 1) until some hardware was accompanied with it (stage 4 - turbo and intercooler). With a flash that is turned on its side a bit and we now have direct control of the fueling and are able to maximize what is already there. Getting very similar numbers without any modifications to what you saw with stage 4 previously in the process. When released, what you will see with the flash based big turbo mapping is that peak power is only minimally improved but the top end power lasts longer and will be flatter. Unfortunately it will still be fueling limited as that is simply what the pumps can handle.