something i just read on the boost sites about our ecu's ... seems we can run different fuel maps via the comfort setting.... our cars already run a different boost map in C vs S/S+ and tuner says can reprogram to make it so those are different fuel maps... basically like C is 93 oct and s/s+ is race fuel

here is the post : "This car specifically, there is two boost settings, comfort and sport! Basically we have more aggressive boost curve on sport than comfort, both are completely different from stock so technically the whole idea with this is to be able to run 93 + meth for a daily driving, and sport for 100 + meth, different boost targets=different loads, by setting up your timing tables to run more timing when hitting higher boost/higher load you can actually make the car behave like it was two different maps... on the meth dependency idea, its really not that big of a deal, reason why is because #1 a mixture of 50/50 doesn't impact extremely your fueling, #2 we prefer to use meth/water as a cooling agent and for consistency, not really as a power adder or auxiliary fuel. It really comes down to the way you tune both the Ecu and the meth kit to work with each other! Same afrs with or with meth, couple degrees more of timing, so in case meth fails, closed loop fueling will take care immidiately using fuel trims (which as long as they are -5/+5 range, Ecu has room to adapt), and the knock detection/prediction on this cars, being so accurate will pull 1-2 degrees with no problem or even sweat it! They can get to pull even more than that just by the increase of IAT between couple pulls on the highway."

 

I saw this too, and will be reaching out to Jerry @ EC to discuss options.

 

Usually only pedal maps and torque limiters are altered between C/S/S+
Hopefully I am wrong on this one.

 

someone else brought that up :

"I find it hard to believe that we could have dual maps being 1) C mode 2) sport/ sport +/ manual mode. Most tuners for the m156 use the dimsport software. Unless you mean we flash tune the ecu and then run a piggy back ecu ontop with another tune (I still don't see that working). If you could please elaborate more about what your saying and how it can be done that would be great. I'm sure it would be another great option for many of us who race our cars.

reading your reply again, wouldn't the torque tables be adjusted from the traction control button? I'm assuming this does exactly what you mention. When it's on, throttle response is less aggressive, throttle opening is restricted etc yet when traction control is off you have access to full power (this is how it is from factory right?) and your telling us we can adjust these features to our advantage and manipulate it as though we run dual maps via the torque tables? I'm just trying to get my head around it."


and tuner replied :

"It doesnt matter everyone uses the same software or a different one, at the end of the day they all are just tools, some people take it further than others. Maybe you could ask other tuners why they dont make other cars go as fast as other tuners too... I cant answer you questions for them, maybe you should ask them instead. This is really a matter of how far you want to take something, at the end of the day im not here to probe you or anyone else what im saying its true or not, if want to be one of those living in a bubble where something is not true because Others dont do it thats on you. Now to answer the second question, no they have nothing to do with traction control... traction control is just a logic that reduces throttle and even adjust braking in some cases when see different wheel speeds..... Its really completely out of the context when it comes to torque management in the ECU, completely different topics... maybe knowing a little bit more about how the ECU manages the engine in general will make my statements a little less hard to believe."

 

I saw this on another forum as well and I'm wondering why information like this is just kept in the dark until people start actually discussing it. I'm not sure who the guy is who is revealing some of this information, but this is probably not what your local tuners want to hear because if they were capable of doing it already, they would be offering it.

 

i think it eludes to a point i have made many times....99.0 % of mercedes owners are hapy with stock performance and 99.9% of mercedes owners are satisfied with running ~11 @ 125-129 with just tune, so the .01% like you and me are not enough to spur further aftermarket development... economies of scale

 

Link please?

 

mbworld wont let you post a link to other benz forums, but if you google search this , you will find it "
Bolt on tuned 2015 W212 E63 AMG 4Matic with methanol and Precision ECU tuning runs 10.9@128 in the 1/4 mile"

 

Thanks, found it.
I registered there, but haven't received my email to verify so can't post

 

If the ecu truly has the ability to hold 2 ecu tunes, which remains to be seen, it's relatively easy from a tuning perspective. Can't think of reason why no tuner has mentioned it before now.

DSm and Evo guys have been doing it for years via cruise control stalk or other trigger.

His whole meth idea, IDK about that, as a fail safe should always be incorporated regardless of how "safe" your meth tune is. Wiring up a fail safe is where it gets complicated.

 

The idea would be run your max street tune in Comfort, and race tune with higher boost targets and Timing bump in S, however the meth system would still be seperate, not selectable based on drive modes. basically, arm the meth, switch the drive mode. Talked to Jerry at EC and in fact may be doable. After I get the new turbos on, I have an AEM meth kit I might try out if we can make this work.

 

That's not my point... my point is RennTech, EuroCharged, AMS, etc. should have been aware and offering something like this.. especially since it will give one of the tuners the edge over another.

 

it seems like they were only using it for cooling, so no need for a meth fail safe if you arent tuned for it and just using it as cooling... kinda same if you pour some race gas in your gas tank tonight... no fail safe but your not tuned for race gas so no big deal... just would prevent your ecu from pulling some timing

no if you tune for it and start advancing timing then yeah, fail safe needed