Help Wanted: Turbo Lag After Trans. Update?
Thread Starter
Member
Joined: Sep 2016
Posts: 112
Likes: 7
C63S AMG Coupe
Help Wanted: Turbo Lag After Trans. Update?
Guys, I recently got a transmission update to fix a jerky shift from 3-4. That worked and it actually makes my exhaust pop now lifting off throttle at 3k rpm. It feels as though there is more turbo lag and I'm asking your help to see if my gut is correct. I have a 2017 C63S coupe.
Can some of you please test the following scenario and let me know your results:
Driving @ 37mph/60kmh in 5th gear right at 1,500rpm on a flat road. Sport+ & manual mode. If I floor it boost takes a 3 count to kick in and I don't really start getting solid acceleration for about 4 seconds (i get up to 2,000rpm in about 4.5 seconds).
I really feel like even in a scenario at low rpm before I really never could floor it and leave my floor on the ground without getting pretty heavy acceleration. Power when the turbo kicks in still feels the same as before, just more lag. Let me know your thoughts. I mentioned this to the dealer and have yet to hear back from them. Not sure if I should take it back and see if they can re-tune something.
Thanks!
Can some of you please test the following scenario and let me know your results:
Driving @ 37mph/60kmh in 5th gear right at 1,500rpm on a flat road. Sport+ & manual mode. If I floor it boost takes a 3 count to kick in and I don't really start getting solid acceleration for about 4 seconds (i get up to 2,000rpm in about 4.5 seconds).
I really feel like even in a scenario at low rpm before I really never could floor it and leave my floor on the ground without getting pretty heavy acceleration. Power when the turbo kicks in still feels the same as before, just more lag. Let me know your thoughts. I mentioned this to the dealer and have yet to hear back from them. Not sure if I should take it back and see if they can re-tune something.
Thanks!
Member
Joined: Jun 2016
Posts: 146
Likes: 26
2017 c63 Amg s (almost)
Guys, I recently got a transmission update to fix a jerky shift from 3-4. That worked and it actually makes my exhaust pop now lifting off throttle at 3k rpm. It feels as though there is more turbo lag and I'm asking your help to see if my gut is correct. I have a 2017 C63S coupe.
Can some of you please test the following scenario and let me know your results:
Driving @ 37mph/60kmh in 5th gear right at 1,500rpm on a flat road. Sport+ & manual mode. If I floor it boost takes a 3 count to kick in and I don't really start getting solid acceleration for about 4 seconds (i get up to 2,000rpm in about 4.5 seconds).
I really feel like even in a scenario at low rpm before I really never could floor it and leave my floor on the ground without getting pretty heavy acceleration. Power when the turbo kicks in still feels the same as before, just more lag. Let me know your thoughts. I mentioned this to the dealer and have yet to hear back from them. Not sure if I should take it back and see if they can re-tune something.
Thanks!
Can some of you please test the following scenario and let me know your results:
Driving @ 37mph/60kmh in 5th gear right at 1,500rpm on a flat road. Sport+ & manual mode. If I floor it boost takes a 3 count to kick in and I don't really start getting solid acceleration for about 4 seconds (i get up to 2,000rpm in about 4.5 seconds).
I really feel like even in a scenario at low rpm before I really never could floor it and leave my floor on the ground without getting pretty heavy acceleration. Power when the turbo kicks in still feels the same as before, just more lag. Let me know your thoughts. I mentioned this to the dealer and have yet to hear back from them. Not sure if I should take it back and see if they can re-tune something.
Thanks!
Thread Starter
Member
Joined: Sep 2016
Posts: 112
Likes: 7
C63S AMG Coupe
I know it's low RPM but I wanted a test that people could easily and safely try so I can compare notes.
It does feel like more lag than before in lower gears and higher RPM as well. Obviously less lag but more noticeable than before.
It does feel like more lag than before in lower gears and higher RPM as well. Obviously less lag but more noticeable than before.
MBWorld Fanatic!
Joined: Jan 2017
Posts: 1,117
Likes: 182
Mercedes-Benz E63s AMG
By the way, it's really not good to lug your engine like that, only puts risk for engine damage without any benefit... Turbo-charged engines 101. You really should never be in that situation, and I most definitely will NOT do that to my engine for your experiment. I advise others not to either.
Of COURSE you don't have any acceleration in 5th gear at 1500rpm... you're at a HUGE gearing disadvantage... I doubt turbo lag has anything to do with it. I bet if you look at your boost gauge (if we can even rely on that) it'll show at least 2/3 boost, indicating the turbos have no problem spooling... and the ECU is probably holding back at that RPM and load with the boost & fuel injection to avoid low RPM pre-ignition (= boom)
Of COURSE you don't have any acceleration in 5th gear at 1500rpm... you're at a HUGE gearing disadvantage... I doubt turbo lag has anything to do with it. I bet if you look at your boost gauge (if we can even rely on that) it'll show at least 2/3 boost, indicating the turbos have no problem spooling... and the ECU is probably holding back at that RPM and load with the boost & fuel injection to avoid low RPM pre-ignition (= boom)
Last edited by skim7x; Jun 13, 2017 at 05:32 PM.
Thread Starter
Member
Joined: Sep 2016
Posts: 112
Likes: 7
C63S AMG Coupe
You're right my engine broke from doing it. And my comment of it taking 3 seconds for boost to build means I was looking at the boost gauge and it was showing no boost. Thanks for the response.
MBWorld Fanatic!
Joined: Jan 2017
Posts: 1,117
Likes: 182
Mercedes-Benz E63s AMG
And if your boost gauge shows no boost at WOT, then you most certainly have a problem and should go to the dealership. No need for public inquiry if something is wrong or not... There clearly is! �� Good day, mate!
Last edited by skim7x; Jun 13, 2017 at 08:43 PM.
Trending Topics
Senior Member
Joined: Sep 2016
Posts: 328
Likes: 24
2017 c63s
He's right and your attitude sucks. Who gives a **** if you are not seeing boost at such a low rpm in such a high gear. This car can only do that if you are forcing it to you. You have intentionally set the car up for failure. That's the reason you aren't seeing instant boost is because the turbo have no way to produce significant boost with the low amount of gas passing the turbine wheel. Very few turbos will at 1500 rpm. I have no idea why people are so damn convinced that this car has turbo lag. You should sell the car since it is too laggy for you.
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Thread Starter
Member
Joined: Sep 2016
Posts: 112
Likes: 7
C63S AMG Coupe
Wow you people are miserable. All I said was I feel like I notice a bit more lag and was trying to come up with a way to compare it without driving another car since it's very subjective. I know it won't have power or turbo down that low. I didn't want people punching it in higher RPMs and trying to focus on how long it takes for the turbo to kick in. The whole point was to do it at an engine speed so that it's more exaggerated.
I never said this car has a ton of turbo lag. In fact I said before that it seemed like it had near instentanous power. It just doesn't feel that way now. Thanks for the help guys, gotta love the forum. It always amazes me how people love to be negative instead of just trying to help people.
I'll just go drive another C63 to compare myself.
I never said this car has a ton of turbo lag. In fact I said before that it seemed like it had near instentanous power. It just doesn't feel that way now. Thanks for the help guys, gotta love the forum. It always amazes me how people love to be negative instead of just trying to help people.
I'll just go drive another C63 to compare myself.
Thread Starter
Member
Joined: Sep 2016
Posts: 112
Likes: 7
C63S AMG Coupe
I don't think anyone said it was brutal. It's just pointless when people are like that. That's how all forums are though. You gotta take the good with the bad and hope you get a couple helpful responses amongst the many useless ones.
Also, this thread should be closed at this point. It's gone completely off topic and I'll get my answers somewhere else.
Also, this thread should be closed at this point. It's gone completely off topic and I'll get my answers somewhere else.
Thread Starter
Member
Joined: Sep 2016
Posts: 112
Likes: 7
C63S AMG Coupe
I got my answer by doing a little research. Should've started there first, that's my fault. Peak torque is supposedly in as soon as 1,750 rpm. I'm nowhere near peak torque at that rpm. I'm not at peak until around 3,000. At 1,750 I feel like I have about 250tq.
End thread.
End thread.
Senior Member
Joined: Sep 2016
Posts: 328
Likes: 24
2017 c63s
The turbos on this car are capable of spooling really quick. Mercedes actually made a mistake in my opinion on the turbos. They spool too soon and run out at higher rpms.
Boost will not be changed with a tcu update. The shift points would change. I can't think of any reason why the update would change anything in a single gear like that
Last edited by Dthquazi; Jun 13, 2017 at 11:38 PM.
Member
Joined: Feb 2017
Posts: 94
Likes: 12
2017 AMG c63s
After having some work done on my car I had a similar issue. The car had terrible lag, it felt like the emergency brake was on in low gears. My mechanic took it for a drive and agreed with me so they hooked it up to the computers and turned out that the voltages were off. He thinks the battery drained while it was in the bodyshop(simply leaving the key fob in the car for a couple of days could cause a battery drain he said) A simple reboot of all the systems fixed things and it is driving great. I am not sure if this is your issue but it sounds like it might be.
Thread Starter
Member
Joined: Sep 2016
Posts: 112
Likes: 7
C63S AMG Coupe
After having some work done on my car I had a similar issue. The car had terrible lag, it felt like the emergency brake was on in low gears. My mechanic took it for a drive and agreed with me so they hooked it up to the computers and turned out that the voltages were off. He thinks the battery drained while it was in the bodyshop(simply leaving the key fob in the car for a couple of days could cause a battery drain he said) A simple reboot of all the systems fixed things and it is driving great. I am not sure if this is your issue but it sounds like it might be.
