MikeTc63

Hey guys need help.. 13 coupe non p31 also no LSD .. Went to englishtown 2 weeks ago with NO TUNE just secondary cat/res delete with straight pipes , also afe filters with CD..

Weather was humid and low 80s

Ran 12.5xx @113
Went yesterday ran 3 times similar weather ran 12.6xx @112??'!! With the Euro v5?? Very confused ,,
Had it flashed by a euro dealer local shop near me..
Does this tune take a couple days to adjust? Please help tryed calling euro...no answer

CarHopper

Call again.

My guess, driver error. More power in a car that struggles for traction in the first place means you need to adjust how your drive.

MikeTc63

Don't know about that.. Set my tire pressure to the same thing I had it 2 weeks ago.. Very similar weather and used launch control?? So don't think to much driver error there buddy

MikeTc63

Also haven't really felt a power difference since the tune

loungn14

slips will show you the difference ...look at the mph

Ingenieur

He went slower?
113 oem
112 tune
???

kfriedenberger

Did you try this: https://mbworld.org/forums/c63-amg-w...et-my-ecu.html

MikeTc63

I'm sorry but why would I do that? Just got tuned 48 hrs ago?

Ingenieur

Can't hurt and seems to reset and allow the car to adapt to the new tune

Sidv22

Doesnt it take around 200 miles for the tune to 'settle' down. basically, the ECU has to adjust to the new tune.

I sent you a PM yesterday

CarHopper

Could be a few things going on here.

1. Did you buy the car used? Previous owner may have had a tune on the car already and that is why you don't feel a difference.

2. Post data from your time slips. Mainly 60' and trap speed.

3. Tune either didn't take or something funky going on there.

Regardless, I would start with technical support from Eurocharged and ask for advice.

kfriedenberger

The best I can gather is as you drive, the ECU tracks driving behavior and starts to tweak baseline settings (fuel map, etc) with a set of deltas. These tweaks don't change the baseline tune at all. Doing the ECU reset erases these adaptive changes. I would think when a new baseline tune (v5) is applied, the procedure should reset these adaptive tweaks as well, but maybe not? I'm not an expert, but I can tell you that when I do the reset periodically, the responsiveness drastically changes (mine is a dd).

jrcart

The trap speed would be higher if what you are saying is the case. The tune should net more HP and thus a higher trap speed regardless of E/T

jrcart

.........But he trapped slower

Ingenieur

Need to see before & after slips
Density altitude would help too

m a x i m u s

interesting, didn't even think about that one.

CarHopper

That's why I brought up the possibility of the car already being tuned.

Regardless, you'll feel a difference with a tune if you went from non PP no tune to a tune.

Ingenieur

Gotcha
Buth runs were on tunes
That is a good deduction

jrcart

Yes, that is a possibility, and what you said about a slower E/T due to extra power making the launch more difficult is spot on as well, however the lower trap speed 100% kills that theory. Bad launch will almost always equate to a higher trap speed.

The day I went 9.1 these were my E/T's and Traps, as you can see with each improvement of E/T there was a noticeable reduction in trap speed.

9.63 @ 155.5 1.63 60ft
9.60 @ 155.0 1.59 60ft
9.49 @ 153.8 1.51 60ft
9.17 @ 150.4 1.47 60ft

MikeTc63

Bought the car new

CarHopper

I agree, which is why I moved on to the possibility he was already tuned.

Which is now confirmed he couldn't have been tuned.

Has Eurocharged answered the phone? At this point, if the car was not tuned to begin with, and trusting that your butt dyno is accurate and your driving is consistent, I would have to say the car didn't get properly tuned and you should return to a stock map and reflash.

fraktv

Wouldn't Eurocharged know if the car was tuned because you have to send them your original ECU map before they e-mail you the tuned map.

loungn14

totally missed that...

OP what dealer tuned you?

jrcart

Hmmmm....Something is not adding up, as I already stated car should have trapped faster regardless of E/T. Was there a huge head or tail wind one day? Same track, similar temps, weather, DA and over all conditions should have been running quicker with the tune.

This is a perfect example of why I always like to get a baseline dyno figure before starting on mods. It is nice to be able to see how much power a specific mod netted you.

The good news is Eurocharged is a reputable tuner and will get to the bottom of it if there is any issue with the tune. You are in good hands.

kfriedenberger

At least with the handheld, you can't download the stock tune from our cars. It pulls down an ID file (VIN, something else?) from the ECU and then EC encodes the tune file with it. Then they send you both encoded stock and tuned files back.