stangxs

hmm, I don't know it it's possibly the different "tone" that's throwing me off, or not. But I feel like the throttle response got slower. Maybe I need to have the car get used to it? Any way to "reset" the computer to start from fresh?

Mort

I have heard you can reset the adaptive cells in the ECU if you disconnect the battery for at least 15 min. Never tried it myself.

GHAZAN

less back pressure

_AMG_

Never heard of power loss because of an X pipe.
I actually gained HP when switching to the MBH X pipe. The ECU reset actually works I tried it last week and the car felt great.

khmergod

Maybe weather is hotter? This 100f weather is making my car feel sluggish.

stangxs

It was 72* out when I drove the car yest, I love beach weather


btw, I may have confused you guys, I didn't complain about loss of power (actually feels a little quicker), I was complaining about the throttle response, didn't feel as sensitive as it did before.

aznkuja328

shouldn't be exhaust leak right

bushburninc63

How did you reset the ecu? Unplug the battery terminal?

_AMG_

Yup, I unplugged the battery for about 15-20 minutes then reconnected it.

bushburninc63

does it delete all the settings on the car, radio presets, seat memory etc etc?

Maverick1975

I had an xpipe/kiss pipe put into my SL63 and it dramatically changed the tone (not aggressive enough now and lower decibels) but it really changed the low down torque on the butt dyno. I am never trust the butt dyno but it was a bit of an experiment and i didnt know what to expect so i discount the placebo effect....just need to get the aggressive tone back now, maybe reduce resonator size i think

sgtstanko

Just installed an X Pipe on mine that replaced the rear cats.
The comparisons were all done at the same dyno/time of day, weather and within 2-3 weeks of each other. Its a Dynojet so it reads a bit high in IMO. Minus about 10HP/Tq for an SAE type reading. The dyno sheet shows Run #002 that is the best out of three with no mods/stock....#005 is best out of three with the X Pipe. #009 is after a local tune.

It takes 3-4 pulls for the adaptives to take place, that is why I take best out of three.

It actually sounds like it is pulling a bit on the intake, which is probably some resonate pulse caused by the X during overlap....IMO.

Mort

Your tune file #009 looks way too lean to me.

sgtstanko

I agree......I hate the fact that no tuner actually readjust fuel on the spot. A real tuner can actually make changes to the air fuel during a dyno session. MB tuners are not at that point......every tune sold by all of them is a one shoe fits all because it worked on some other random engine.

Mort

Your results for the tune file do look very good but I would not be happy with the AFR especially at high rpm. It looks like you have a lean cruise file...LOL.

They are going to be able to adjust your AFR for you are they not? If not I would suggest that you find someone who can.

sgtstanko

I would assume he will being that he has a dyno and all the electronics available to him. The Xpipe significantly leaned out the stock tune but it was still safe. I think the tuner loaded a tune that did not take into account what the Xpipe did to the overall A/F. The XPipe was custom fabricated and placed up closer, unlike the mass produced one. For the most part, most tunes simply address the fact that the throttle blades do not open all the way and begin to close slightly more as the RPM build. They dont take other mods into consideration in my opinion.