GLC43 TUNE
06-17-2024, 08:11 AM
#1
Junior Member
Thread Starter
GLC43 TUNE
Hi everyone
I recently tuned my glc43 to stage 2 with catless downpipes , bmc intakes , aem wmik and turbo upgrade by “das auto” tuning center in Dubai. But the results are not up to scratch. Anyone knows what exactly are the mods I should add or something?
I recently tuned my glc43 to stage 2 with catless downpipes , bmc intakes , aem wmik and turbo upgrade by “das auto” tuning center in Dubai. But the results are not up to scratch. Anyone knows what exactly are the mods I should add or something?
06-17-2024, 09:08 AM
#2
Member
Was this combination dyno tuned?
Typically WMI kits require a fairly extensive tuning process to get the most out of them.
Last edited by TwoC400s; 06-17-2024 at 09:17 AM.
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06-19-2024, 05:59 AM
#4
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06-19-2024, 01:27 PM
#5
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06-19-2024, 05:38 PM
#6
Junior Member
Thread Starter
and a lot of turbo lag
i was wondering if use stock turbos one again
just buy the blades
06-19-2024, 06:05 PM
#7
Member
why such a low RPM? The M276 motor is good to 6250 RPM without issue, the heads flow quite well. If you have upgraded turbos and WMI you should be maintaining boost all the way to redline.
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06-20-2024, 04:55 AM
#8
Junior Member
Thread Starter
because goes into limp mode on 2-3 k rpm on full throttle
06-20-2024, 08:26 AM
#9
Member
No, absolutely not, if you have access to Dyno, custom tuning software, and full instrumentation read outs your tuner should be making those adjustments.
You have some kind of problem, either a bad tune or bad sensors (possibly both). There's no reason for a healthy car to go into limp mode. You need to have a specialist look the car over thoroughly and determine why you have limp mode issues and low power output.
You have some kind of problem, either a bad tune or bad sensors (possibly both). There's no reason for a healthy car to go into limp mode. You need to have a specialist look the car over thoroughly and determine why you have limp mode issues and low power output.
06-20-2024, 02:02 PM
#10
Junior Member
Thread Starter
No, absolutely not, if you have access to Dyno, custom tuning software, and full instrumentation read outs your tuner should be making those adjustments.
You have some kind of problem, either a bad tune or bad sensors (possibly both). There's no reason for a healthy car to go into limp mode. You need to have a specialist look the car over thoroughly and determine why you have limp mode issues and low power output.
You have some kind of problem, either a bad tune or bad sensors (possibly both). There's no reason for a healthy car to go into limp mode. You need to have a specialist look the car over thoroughly and determine why you have limp mode issues and low power output.
06-20-2024, 02:42 PM
#11
Member
I don't know what you have going on. Did you get diagnostic codes when it went into limp mode?
Your original post didn't mention a JB4 at all.
Why would you need (or want) a JB4 if Das Auto can put it on a Dyno and custom tune it for all your specific mods?
Remove the JB4 and go to a shop with an AWD Dyno that has the ability to flash your ECU with a custom tune via the OBD2 port.
Anything else is just guessing in the dark.
Your original post didn't mention a JB4 at all.
Why would you need (or want) a JB4 if Das Auto can put it on a Dyno and custom tune it for all your specific mods?
Remove the JB4 and go to a shop with an AWD Dyno that has the ability to flash your ECU with a custom tune via the OBD2 port.
Anything else is just guessing in the dark.
06-20-2024, 02:53 PM
#12
Junior Member
Thread Starter
No, absolutely not, if you have access to Dyno, custom tuning software, and full instrumentation read outs your tuner should be making those adjustments.
You have some kind of problem, either a bad tune or bad sensors (possibly both). There's no reason for a healthy car to go into limp mode. You need to have a specialist look the car over thoroughly and determine why you have limp mode issues and low power output.
You have some kind of problem, either a bad tune or bad sensors (possibly both). There's no reason for a healthy car to go into limp mode. You need to have a specialist look the car over thoroughly and determine why you have limp mode issues and low power output.
06-20-2024, 04:16 PM
#13
Member
That is FAR too simple of a way to think about it.
The JB4 is a comparatively simple tool, it basically just tells the ECU to push more boost. It is very good at that task, but it relies on the car's controller and maps for fuel and spark control.
If you're already flash tuned it's quite possible to do MASSIVE damage by just slapping a JB4 on top and trying to run Map 4. You have to know EXACTLY what you're looking for with regard to ignition retard, fuel trims, waste gate duty cycle, and boost pressure.
The JB4 is a comparatively simple tool, it basically just tells the ECU to push more boost. It is very good at that task, but it relies on the car's controller and maps for fuel and spark control.
If you're already flash tuned it's quite possible to do MASSIVE damage by just slapping a JB4 on top and trying to run Map 4. You have to know EXACTLY what you're looking for with regard to ignition retard, fuel trims, waste gate duty cycle, and boost pressure.
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06-21-2024, 06:51 AM
#14
Junior Member
Thread Starter
That is FAR too simple of a way to think about it.
The JB4 is a comparatively simple tool, it basically just tells the ECU to push more boost. It is very good at that task, but it relies on the car's controller and maps for fuel and spark control.
If you're already flash tuned it's quite possible to do MASSIVE damage by just slapping a JB4 on top and trying to run Map 4. You have to know EXACTLY what you're looking for with regard to ignition retard, fuel trims, waste gate duty cycle, and boost pressure.
The JB4 is a comparatively simple tool, it basically just tells the ECU to push more boost. It is very good at that task, but it relies on the car's controller and maps for fuel and spark control.
If you're already flash tuned it's quite possible to do MASSIVE damage by just slapping a JB4 on top and trying to run Map 4. You have to know EXACTLY what you're looking for with regard to ignition retard, fuel trims, waste gate duty cycle, and boost pressure.
06-21-2024, 07:06 AM
#15
Junior Member
The JB4 works off the tuning parameters in the ECU so if you have a bad flash tune currently, there's basically nothing the JB4 can do to fix that.
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TwoC400s (06-21-2024)
06-21-2024, 08:01 AM
#16
Member
It took that long for me to know what my car should look like when healthy.
Then, and only then was I confident enough to use Map 6. I self tuned map 6 for several months.
Then I got a flash ECU/TCU tune and was able to use Map 6 to get a couple more horsepower.
I did all that on a basically stock setup (cold air intake only).
OP has thrown every bolt-on mod at once and now has tuning issues.
Not surprising.
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Darrington (06-21-2024)
06-21-2024, 03:07 PM
#17
Junior Member
Thread Starter
Just to give some perspective: I had my car with a JB4 for over a year and logged values constantly during that time period. Over 200 logs, logs at idle, logs cruising stop and go, logs in the quarter mile drag strip. All of those types of Logs on map 1, 2, and 3.
It took that long for me to know what my car should look like when healthy.
Then, and only then was I confident enough to use Map 6. I self tuned map 6 for several months.
Then I got a flash ECU/TCU tune and was able to use Map 6 to get a couple more horsepower.
I did all that on a basically stock setup (cold air intake only).
OP has thrown every bolt-on mod at once and now has tuning issues.
Not surprising.
It took that long for me to know what my car should look like when healthy.
Then, and only then was I confident enough to use Map 6. I self tuned map 6 for several months.
Then I got a flash ECU/TCU tune and was able to use Map 6 to get a couple more horsepower.
I did all that on a basically stock setup (cold air intake only).
OP has thrown every bolt-on mod at once and now has tuning issues.
Not surprising.
I don’t understand the limping on JB4 tho
even on map 2-3
06-21-2024, 03:29 PM
#18
Junior Member
Thread Starter
Just to give some perspective: I had my car with a JB4 for over a year and logged values constantly during that time period. Over 200 logs, logs at idle, logs cruising stop and go, logs in the quarter mile drag strip. All of those types of Logs on map 1, 2, and 3.
It took that long for me to know what my car should look like when healthy.
Then, and only then was I confident enough to use Map 6. I self tuned map 6 for several months.
Then I got a flash ECU/TCU tune and was able to use Map 6 to get a couple more horsepower.
I did all that on a basically stock setup (cold air intake only).
OP has thrown every bolt-on mod at once and now has tuning issues.
Not surprising.
It took that long for me to know what my car should look like when healthy.
Then, and only then was I confident enough to use Map 6. I self tuned map 6 for several months.
Then I got a flash ECU/TCU tune and was able to use Map 6 to get a couple more horsepower.
I did all that on a basically stock setup (cold air intake only).
OP has thrown every bolt-on mod at once and now has tuning issues.
Not surprising.
06-21-2024, 05:14 PM
#19
Member
They cost what they cost for a reason.
Every Mercedes Benz 4 lobe, mechanical HPFP is nearly identical (from a performance standpoint), the only differences in part numbers are due to different inlet/outlet orientation.
Yesterday, 03:51 PM
#20
Member
Yesterday, 04:25 PM
#21
Newbie
If you are in Dubai get intercooler upgrade, split your transmission and turbos cooling (@TwoC400s thanks), and perhaps the most important thing you should do, beyond anything is to visit Tasos (yes that one - https://www.youtube.com/@TasosMoschatos/videos).
If you have access to these guys, you will get the maximum out of your car and it will be done in an intelligent and educated way, no corners cut (also in the maintenance department not only tune-wise).
If you have access to these guys, you will get the maximum out of your car and it will be done in an intelligent and educated way, no corners cut (also in the maintenance department not only tune-wise).
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