hyperion667

I should be careful you're right, thanx for continuing to show your *** to all on MB World

57 GTR

Yea, I am really worried what the forum thinks of me unlike you

Here you are as Seinfeld in this clip.
SEINFELD FANCY BOY PURSE JOE MAYO PARTY FUR COAT - Bing video

EddieNel

Not sure where the hate is coming from. I’m new here. Long story short I’m sick of Corvettes and Challengers etc. I want something different. I have fallen in love with the GTS but I’ve never ridden in one. I want a fast GTS that will beat all the Hell Cat fan boyz.

Im looking to learn all I can before I pull the trigger on one and start modding it. Turbos exhaust dyno time etc. Fortunately I can do most of the work myself.

On a side note. Any opinions on modding the 4liter V8? Is it a pretty tough engine?

chassis

Tuning reports on this site for the 4.0TT seem to be mainly in the C63 and E63 crowd. Basic ECU tune, then exhaust work is the most common. Then injectors, fuel pumps and turbos.

Tough engine? Hard to say. It has been used by MB since the late 2000-teens, so less than 10 years of production history, and low-ish volume during that time. Early build years had chronic misfire which seems to have been solved with coils and software update. Later build years are reporting failed rear main crankshaft oil seal because of failed vapor separators causing crankcase overpressure. No true solution for this yet, other than replacing the separators before they fail, which is reported to happen at less than 100k miles. Seems like an every two year replacement interval would be good, but this is a guess.

So in my view the RMS is a weak link and the separators are problematic, and should be removed if you are going all-out for horsepower.

No reports yet on this engine for bore scoring, chain or valvetrain problems, or piston cracking/wrist pins, etc. All of these items have been reported on recent MB engines.

AMG 17GT

The DCT is the weak link in powertrain. Look to upgrade after tune.

EddieNel

I’ll do a little homework but you’re starting to push me to the Supra. I wonder if you can bypass the separator and just do a vent and catch can? Tranny I’ll have to see what a stage 1 would cost. Thank you for the reply’s.

MalibuScott

Now there's some feedback!

MBNRG

Additional data on Engine Durability:

AMG Affalterbach's dyno cell ran the GT's M177/178 Engine at Full Redline, Non-Stop, for 5 Months without destruction
(https://mbworld.org/forums/coupe-roa...ml#post7720013)

Above was from 2016, too.

I recall another online auto publication also noting the same as above.

EddieNel

Well you son of a *****!joking!!!! I was started g to sway towards the Supra now I’m back in the middle looking at the GTS. Thank you so much for sharing or maybe not for sharing!!!lol. I do love the looks of the GTS but it’s definitely more expensive in every aspect. No comparison in the WOW factor. Speed? Ehhh?

MBNRG

;P

My humble perspective: the GT x lineup's Achilles' Heel:

1. Getrag/Magna 7DCL750DCT that is also shared across multiple Ferrari and Ford GT models. Recommend looking for as late a model year as wallet allows, and ensure any Trans Recalls (Oil Leak issue on the 2016 (?maybe other years), CF Driveshaft Issue)) have been addressed by Mercedes. A good 3rd Party Extended Warranty, or at least an Extended Drive Train Warranty, are very prudent investments.

Trans issues can be mitigated by observing Fluid Change Intervals, and perhaps some Trans re-building at Year 8-10+ with replacement of the original seals, etc.
Reports of the Trans Speed Sensor failing causing Trans to become inoperative are cropping up (see other Forum Threads on this topic).
I believe Mercedes has likely further upgraded/optimized this Getrag/Magna DCT Trans over its years of service across the GT lineup, hence the later model recommendation.

Members who have significantly increased HP/TQ above factory, have used Dodson clutches to further build the Trans to hold the power. (Stock Trans reportedly can handle max ~750 Nm)

Further reading on Trans, potential issues and fixes as below:
https://mbworld.org/forums/coupe-roa...ir-manual.html

2. Exhaust Module/Exhaust Valve Failure
If vehicle you're looking at features Valved Exhaust, either the Module can fail, or the Valve(s) can stick.
Either of these conditions can cause a Limp Mode and severely knee-cap vehicle.
Fixes:
Prophylaxis: Can install an Aftermarket EVM controller to allow "Always Open" valve function.
Another remedy is to mechanically fix the Valves in Open position.
Other members have identified the OEM MB Module with Part # for replacement, if module has failed.

Good luck on your search!
I can def empathize: I was absolutely seduced by the debut of the GT R in Green Hell Magno revealed in 2016 at the L.A. Auto Show.
In 2021, the right one came along after a 6 month search/courtship, and I was able to bring her home.
Honey moon ever since.

W205C43PFL

Completely different car though, Supra has a six after all, you could also consider the C 63 S V8 for cheaper than the GTS but I am not surprised you like the GTS. I remember there was a youtuber, which channel name goes by AMGentics or something went from C 63 S (or was it C 43?) to AMG GTS, you could watch his videos telling you their experience with the transition and any general maintenance needed.

W205C43PFL

To forum member EddieNel, the tramsission used is a Getrag 7DCL750 double clutch Transmission according to the forum member of another thread, it is widely used in many different vehicles but of course AMG has their own tuning on it.
That thread is here, you could read more on this transmission problem/issue here: https://mbworld.org/forums/coupe-roa...ispreloading=1

GTConn

@MBNRG As someone who has the GTC Roadster at the top of my list for my next vehicle...I really appreciate this post. Great info here.

chassis

Agree. MB's DCT and Porsche's PDK are not impressive to me given the likelihood, expense and not-really-DIYable repairs.

In any sports car I would look for a manual transmission or an autobox, preferably from ZF. The GTx family doesn't have a manual transmission variant to my knowledge.

W205C43PFL

Well, I mean... AMG didn't have a manual for a while (or even never?) They would had laughed when you mention manual to them, I think?

I guess the reason being AMG is still based on MB and (they think?) that MB customers aren't as enthusiast driver as BMW (for example...) and don't want to shift their own gears, maybe? Although I could be completely wrong with that assumption.

W205C43PFL

Okay so it was a C 43 to AMG GTS, there is another channel called yaboibakalli which had a C 63 S but went to CLA 45 instead.