cyberorth

So my research so far indicates that having a P31 dev pack pretty much makes ECU tuning eg Kleemann stage 1 redundant.

While the claimed and measured HP increase of most tunes is around 50hp, the side by side tests and dynos show pretty parallel results between P31 and a leading tune.

Now I don't know if some of the advantages of aftermarket tunes like increased throttle opening is also translated in P31 or not.

So the question is: Should a P31 owner get an ECU tune?

Please comment o' wise ones

Sheep

If you are talking about JUST an ECU tune over the stock P31, then my answer would be no. However, any major upgrade beyond that will be a different story.

Sheep

BFNYM156

u can still see gain from tuning a P31 C63, 20 whp?

MiamiAMG

This ^

Exacc

Tuned P31 showed a faster time of .79 seconds in 60-130mph run than the same P31 car before the tune...VBox verified.

Non P31 C63 is about .98 seconds slower in the same 60-130mph run...Vbox verified.

Same road, different driver, different day.

DD GT3 RD

when, where, who? and where the vbox files? who did the tune?

C63newdude

I have a better question. Can't we just get straight up a P31 flash from the dealer? forget about the internals and the 2 piece rotors and the LSD, I just want straight up the P31 tune/flash from factory, that is it!

cyberorth

Actually no more two piece rotor and the LSD is a la carte.

C63newdude

^^ didn't know but thanks for the info. I would do Evosport two pices rotors the next time I need to do brakes.

SonnyakaPig

Exactly. OE Tuning did this. It pretty much makes the P31 neck and neck with their tuned regular C63. Basically, it seems that AMG holds back a touch.

SonnyakaPig

I would guess that the answer is "yes" it can be easily done. But, I think CARB would be the real hurdle.

DuaneC63

The other issue beside CARB is warranty with a tuned non P31 car. The ECU has to be removed and opened, hence the dealer will know. Any driveline issues and you'll be in some "discussions" if MBZ will honor that part of the warranty.

_AMG_

Tuned C63 is dead even with a P31 C63. Tuned P31 C63 is faster then tuned C63.

cyberorth

Brave man. Would you elaborate for us mortals please?

_AMG_

I haven't ran a P31 before but I have seen an OE tuned C63 keep up with a P31 C63 neck and neck.
I was there during this run...
http://www.youtube.com/user/OEtuning...17/VxFiC6_oMsA

khmergod

Did they stop having 2 piece for MY 2012 and beyond? My 2011 has them in the P31.

propain

Bring it to the track and lets see... None of this roll racing nonesense..

cyberorth

Wait what...?
Can you post a pic of YOUR brakes please?

cyberorth

I meant brave for the bold statement you made, of course.

_AMG_

Good call, I would wanna see a tuned C63 go heads up with a P31 at the 1/4 mile.

The P31 is pretty fast compared to a normal C63. I was skeptical at first though.

rory breaker

Ive talked to my SA and the lead tech at my dealership and both say this is not possible on non P31 cars. Disclaimer, this is from a dealer and as you know every dealer is different and most dont know much, but they said the only software updates they can do is the typical STAR stuff. Cracking open the ECU is a big no no.

Mort

My 2010 P31 has composite rotors but they are cast together and not bolted together. A different design from Brembo I think. I found the info:

http://www.brembo.com/US/Cars/Dual-Cast/

cyberorth

Correcto, Mort, but khmergod seems to believe he has two piece on his MY 2011.

khmergod

Sorry, confused myself. Composite, not two piece. BTW, which perform and/or last longer?

DD GT3 RD

I think this is false, as Propain and John both have faster 60-130 times than me. I think they are even, they do have better weather and 93 octane , but I'd guess on same day, same gas would be on the driver, so Propain would win