Hey everyone, I am considering a turbo upgrade for my S450 Coupe 2018 (European model, M276 3.0 TT, M276.824). I've previously covered Intake & Downpipes, and Intercooler Kit choices.

The following turbo upgrades seem to be available for our engines:

1) Weistec
2) TTE
3) TTH
4) MuchBoost
5) MW (stage 2 and 3)
6) TurboKits

Does anyone have any idea which of these turbos would be the right choice for a daily driver with target of 500-525 BHP (not talking about built engine with 650+ BHP)?
What is your experience with turbo upgrades for these engines?

NB. I have already: purchased HPFP pump for BMW's B58, installed S63 coupe (m157) exhaust, removed the OPFs, pre-ordered ZAC's intake, purchased upgraded intercooler, right-side wheel arch radiator (from the m176/m278 engines), and gotten blow-off valves; will remain with the stock downpipes. I believe (and I might be delusional) these upgrades plus turbo upgrade would be sufficient to get to the 500-525 BHP range, in a relatively safe manner, given that I do regular maintenance as indicated in my other posts.

 

I had at one time considered the Weistec upgrade but then thought about the potential strain on the transmission. It's not the HP that will stress the transmission; it's the added torque. Have you looked at whether our stock 7G transmissions can handle the increased torque?

 

I would anyway limit the torque to ~720 Nm. Yes this will be stressful for the transmission because for our cars it is specced for 500 Nm, but there hasn't been any reported cases of issues for Stage 1, 2 and even 3 cars which have been driven for 30-50-100k km after the tune.

 

Also I am with the 9G transmission.

 

I had my torque set to around 580whp. Never had any issues with the transmission worked beautifully with the TCU tune.

 

your best choice is to get a different car. the car was not made to handle that much power.

the amount of money and effort it will take you, you will have been better off getting a different car.

not to mention all the things that can go wrong during the rebuild, like the shop messing up your car

 

Yeah, there is really no point in any hobbies?
just lay down and do nothing.
Have you considered that some of us tune our cars because it's fun?

 

The comment wasn't about you. Effing up an S-Class isn't the same as building model airplanes.

 

Now I dont follow, what got your panties in a knot?

Was just commenting that not everything is about makings sense, its about having fun.

I build my own turbos, my own connecting rods, make everything myself because its fun.

It doesent make sense to buy a CNC milling center and turning center for hobby but I dont care.

 

I think the term is "panties in a wad". My panties aren't in a wad, but it is rather cocky of you as a newbie with 2 posts at the time to make snarky comments about someone offering prudent advice. The OP was asking about experience people have had with the list of turbo kits, that led to a discussion about what was reasonable torque for the 9G transmission. I don't know if @waisoserious advice was just being conservative or if he actually has experienced trying to upgrade the M276. Regardless, it was reasonable to suggest that @Lou275 consider the possible consequences of his mods since the car is his daily driver.

 

Oh this is a pissing contest forum about post counts?
have seen it over and over again online, someone who the comment didn't even refer to has something to say to boost ego or something/

MY point was, about every time there is something that is not reasonable or is out of the ordinary the answer is no point why just bother. Buy the faster car.
its the same in all the car forums, and some of the members just forget that its fun and a hobby to tinker with ones car.

I might be a newbie in this forum but have built stuff that have won races, been the best, the fastest.
but it seems I am not worthy as I don't have a some super poster title to comment on a public forum.

its a shame as I was building my own set of turbos for my own C43 but it seems I need to find a better suitable forum for that stuff.

 

Sounds about right.

Sounds like you have been here before.

So, doing all that stuff lets you think you can just stroll in and start mocking people? This is a community of enthusiasts that try to help other members. You should go back and reflect on what you posted when @waisoserious offered prudent advice.

Sounds like a plan.

 

I can give you an update as soon as I get my turbos back from Weistec. I have a ‘17 E43 that I’m looking to get the most out of. I too haven’t seen much if any reviews of turbo upgrades for the M276 either.

 

[QUOTE=Lou275;9073456]Hey everyone, I am considering a turbo upgrade for my S450 Coupe 2018 (European model, M276 3.0 TT, M276.824). I've previously covered Intake & Downpipes, and Intercooler Kit choices.

The following turbo upgrades seem to be available for our engines:

1) Weistec
2) TTE
3) TTH
4) MuchBoost
5) MW (stage 2 and 3)
6) TurboKits

Does anyone have any idea which of these turbos would be the right choice for a daily driver with target of 500-525 BHP (not talking about built engine with 650+ BHP)?
What is your experience with turbo upgrades for these engines?

NB. I have already: purchased HPFP pump for BMW's B58, installed S63 coupe (m157) exhaust, removed the OPFs, pre-ordered ZAC's intake, purchased upgraded intercooler, right-side wheel arch radiator (from the m176/m278 engines), and gotten blow-off valves; will remain with the stock downpipes. I believe (and I might be delusional) these upgrades plus turbo upgrade would be sufficient to get to the 500-525 BHP range, in a relatively safe manner, given that I do regular maintenance as indicated in my other posts. [/QUOTe


you can get to 520-550 hp without turbo upgrades. They are useless If you can’t turn up the boost and use them.

 

Thank you all for the "valuable" input on the "unapparent" risks of blowing up my engine by increasing its BHP by 40-50% - I really couldn't have come up with that, truly helpful info.

On another note, Jimmy I got all these parts and I want to push the boost but I am afraid for the rods going bendy bendy at 550 BHP, also given the fact that my tuner is not a reputable one like the one you have been working with on your legendary build (one and only really, congrats on that built thanks for showing this community what this engine is capable of), I am afraid to push it beyond 520 BHP with the stock internals. I am thinking that at 1.2-3 bars (17-19 psi) of boost I will get to 500-520 BHP with the upgraded turbo (given that I have all of the other parts in place). Thanks for letting me know about the transmission strength by the way, I didn't know it is that tough (my car btw is a non-AMG so I am not sure if I have the torque converter one or the DCT and if that would matter at all)! By the way, did you have sleeved block in your build, I saw one guy made one a while back on Facebook but no word since?

Turbo Choice
I have chosen the TTE540 (https://tteglobal.com/amg-mercedes-b...-turbochargers) and I got them with 25% discount on the Black Friday sales. Their website claims that they got to ~545 BHP with downpipes, WMI, and 102 RON. I won't have neither highflow/decatted downpipes and WMI, but I think, considering the rest of the upgrades, I mentioned earlier, I should get to the 500-520 range. Also a few people in Germany got to 550-580 BHP with such a turbo on C43 and GLE43. Will report on the results once I get them.

 

I did not sleeve the block Carrillo rods and pistons and studs. You can get to 450-460 whp which is around 540 bhp with just catted downpipes TCU ECU TUNE intercooler and HPFP& LPFP e40 tune and you are there. No need for turbos if you can’t turn up the boost. With that set up I made 450/486 whp car was running 11.1 1/4 mile 3.2 0-60. Not sure why you are so hooked on updating the turbos to add 1-2 pounds of boost. . As the car won’t handle anything else without rods and pistons.

 

I guess you are right and I underestimated how much better is going the route of fuel pumps, downpipes, and intercooler and went all out overkill on all other upgrades totally unwarranted. You got to 450 whp with the stock internals and held alright?

 

held perfectly. Strong no issues at all. Consistency and great power all across the board

 

Slightly bigger turbines will help to get the heat out of the engine and bigger compressor wheel means more flow with same pressure.
Less heating the intake charge, again easier on the engine.
Mass flow through the engine, makes power not pressure, the easier the flow the more power you make on same pressure.
Our stock turbines are way restrictive, and really start to suffer after 400hp, compare the turbos to the M278 ones and you see what 500hp turbo design should look like.

I think Mercedes deliberately put very small turbos on the M276 to reduce its power so it wouldn't rival the M278 models. But that is just my line of thought.

 

Actually, one of the main reasons (apart from power) for me was to keep the engine off the stress of that extra power as much as possible.
That's why I also want to add the auxiliary radiator in the right wheel arch, and perhaps if not enough, also the "horizontal" one see my thread here where I talk about these radiators (in Image 1 that is the number 1 radiator), and even perhaps split the transmission and intercooler circuits via the MW or ZAC kits.

I did also some research on the available turbo upgrades and from the information available I thought that the TTE upgrade should be best, especially for its price, note that the numbers in red are implied based on the Trim values from the Mamba and Weistec upgrades.
For Weistec I used the image they provided on their website and counted the difference in pixels between the two images to get to the size of the compressor wheel (given that I knew the stock values from the Mamba upgrade). There is really not much info on the rest, but I suppose I understand their reasons.

About the deliberate placement of smaller turbos on this engine - I agree, this engine is very capable, it could very easily rival the 278 and 157 especially due to the fact that they are very prone to scoring if you tune them, also their Garett turbines turned out to be really weak (hot side cracks, Tasos documented both issues extensively). What I think is that the 3.5 liter version of the m276 with larger turbines would easily beat the m278 in both reliability and performance. By the way Garett (for gasoline engines) turned out really poorly for Mercedes; IHI in the M276, and BorgWarner in the m275/279 and m176/m177 hold well.

DM me please about your research on turbo upgrades, really interested in learning more about what you found out yourself when checking all of these first hand.