Benefits of an ECU tune for your C63 AMG - What Are They?
06-01-2011, 03:55 AM
#26
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08 C63, 07 ML63, 92 500E, 70 300SEL 6.3, 63 220 SEB Conv. Sold 02 G500, 97 E50,92 C280,71 280SE 4.5
I think the ECU tune should be the same regardless of octane rating for fuel as the Timing and other parameters for octane rating are adjusted based on the engine sensing Knock I think the ECU will advance the timing and other parameters as far as it will go until it senses knock. I don’t think the engine can decipher octane but probably the effects of octane through engine knock
Last edited by jafores; 06-01-2011 at 02:11 PM. Reason: spelling
06-01-2011, 10:59 AM
#27
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2013 ML63 AMG PP
Thanks GMW so if tuned to 525 or more don't you need to adjust the vehicle's brakes because even if you opt for P31 the brakes are now bigger so in order to compensate for the extra power you'd need extra braking, correct?
By the way, how have some of you U.S. guys dealt with the warranty issues of a tune or dealt with re-flashes to stock? I understand some tuners offer a free re-flash with their tune but I always assumed that if you were to modify any internal components, dealers would use that as an excuse to not service the car or void the warranty?
By the way, how have some of you U.S. guys dealt with the warranty issues of a tune or dealt with re-flashes to stock? I understand some tuners offer a free re-flash with their tune but I always assumed that if you were to modify any internal components, dealers would use that as an excuse to not service the car or void the warranty?
The stock brakes are more than up to the job. That said I did notice a difference (as in having to apply fractionally more pressure on the pedal) after the tune but this can be attributed to the fact that I could build up more speed, more easily. The brakes still stop with great force that has you (driver) leaning forward. We should be able to anticipate it and prevent the lean, unlike a passenger, but that's just how strong they are!
. Don't worry yourself about that.
06-01-2011, 12:20 PM
#28
What does that even mean? I thank you for your great contribution to this post but I don't quite understand that reply. 
Anyway, I'm really not sure now what to think about all this now. Octane here is really pitiful compared to other places. We, in California don't have access to more than 91 for the most part. Therefore, I'd think that the stock ECU would be tuned to adjust for the 91 Octane. Now, if that's true then by tuning the ECU to put out more power, you'd need to run on higher octane levels to really achieve that power, right?
I apologize for my naiveness here, I'm just really trying to inform myself better since I'd like to really believe that tuning the ECU would not have any harmful effects during the long run of the car's life. It really bothers me to see that P31 offers more HP and it's completely fine, but my C63 may have issues with an ECU tune because it's not direct from the factory.
Anyway, I'm really not sure now what to think about all this now. Octane here is really pitiful compared to other places. We, in California don't have access to more than 91 for the most part. Therefore, I'd think that the stock ECU would be tuned to adjust for the 91 Octane. Now, if that's true then by tuning the ECU to put out more power, you'd need to run on higher octane levels to really achieve that power, right?
I apologize for my naiveness here, I'm just really trying to inform myself better since I'd like to really believe that tuning the ECU would not have any harmful effects during the long run of the car's life. It really bothers me to see that P31 offers more HP and it's completely fine, but my C63 may have issues with an ECU tune because it's not direct from the factory.
06-03-2011, 06:13 AM
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2013 ML63 AMG PP
There are times they both spin together as if I have an LSD so the software must be pretty good! I'm guessing an LSD will just give me more control, 100% of the time from the get go of the slide because either way, LSD or not, there is a LOT of torque going to those rear wheels. In summary, if you plan on going to the race tracks a lot, get a diff otherwise, it's down to your driving style and preferences.
