I sure did and replaced the LPFP pump and the fuel pressure regulator. After that it’s not thrown a code yet. I moved the methanol to behind the heat exchanger yesterday. That helped a ton. I will check them out.

This post kinda died. Any update on car?

Not racing, street car/commuter. AMR tune and hybrid turbo,DV/BOV, intake, charge pipe, downpipe, stock mid pipe, straight pipe to bumper. Some juicy carbon bits attached here and there. Looking for a methanol kit.

this thread is hilarious. started off promising. then once he said i hope to get 5-600 HP out of the motor that's where he lost me. All the while running on stock fueling. lol. WMI can only compensate so much.

Then when no time slips, dragy, dyno, etc or any proof of said "fastest" c300, the dude lost all credibility. Not even a pic of the turbo installed? Maybe i missed but i only saw a pic of a charge pipe and meth.

The c43 struggles to do 500whp, and even with turbos we are still exploring the limits of these motors. The c63, double the cylinders and turbos, is only doing about 600ish +- 50 whp when tuned.

Goodluck, i hope you post some proof of these claims instead of some dead updates. Whats your username on draggy? You have to have some times posted?

what motor and mods are you tuning? The cla amg 4 banger is doing 650hp with mods and tune, which is nuts. I think they are 442hp factory, not sure. The c63 is a totally wild animal compared to the 2 and 3 liters and btw they are doing 900hp+ with mods and tune. I understand the platform I began with and am having fun, even under 500hp.

i understand what these cars full potential, are. I know the c63 is capable of 900hp, but not with stock turbos or stock fueling, and will generally need a built motor or trans for long term longevity. I am not an expert on the cla45 motor but i know the mods required for 650whp would be quite extensive and dont those have forged motors already?

What i mean is this thread is talking about just throwing meth and a turbo on and getting there. all the true amg cars like cla45 and c63 have a huge leg up on fuel systems, and engine strength. with the c43 we had to upgrade the whole fuel system (LPFP HPFP, intercooler, etc to reliably make 500+WHP). By the way, the c300 has the same LPFP as the c43 so you may want to start looking at LPFP upgrades if you want to make 500+

All i am saying is the c300 is going to need many more mods than just a big turbo and WMI to make big power consistently and reliably.

And where are the dyno numbers or the draggy that you guys are doing with these setups. would like to see some results.

Roger that, I too was excited last year when I came across this and wondered what/why/where tf etc lol happened. The weistec package on their website for the c63 is where Ive been drooling for a while. We also have the m276 motor in the slc43 but that’s leased and in pristine condition so the poor m274 is getting all the abuse. IMO our year sedan is sexy af and mine makes all the right noises. The turbokits upgraded turbo made an awesome difference and I don’t feel like the mods and tune etc is too dangerous...It is known though, if money wasn’t a thing we’d all have the beast mode versions of the lineup. (My local dealer has a sweet deal on a zero mile ‘19 c63 with all options). Nope. lol

oh- and are you factory injectors etc? Just new pumps?

Subtle or nope? I think I fn love it....

c43 has the same injectors as the c63. all variants have same fuel lines as well. so yes we just updated the pumps and are good to go. working on a full e85 tune.

im sure your turbo kit is fine, but its not making 500-600 hp. im really just referring to the OP how he wanted 500-600hp. its going to take a lot to reliably do that.

have you dynoed your c300? what does it make with the turbo? any 1/4 mile times or traps?

edit: also for me luckily it was not about the money, but this is my daily so I wanted AWD. the c63 doesnt have that unfortunately. So i made my c43 as close to a 63 as posible, brakes, body kit, engine power etc. just doesnt have the sweet exhaust note , but its faster than any c63 in stock form and even stage 1 tunes.

That was a smart planning choice, mine will drift every corner if I want 🤤 and no this is only the second week with new turbo and new tune, I will post my numbers when that happens though. Want to have meth too. E85 should be really exciting. Good luck with your toy and have fun!

Too bad the c43 has no eq boost. How wicked would it be to put the gls63s engine in a c43 then... À c class with the v8 engine of an e class + eq boost.
If I had money to spare i would make such a project with the e53 coupe or the cls53

yeah the piezo injectors are the same across the variants from the C63s down to the C180, same also for the A class folks....

what was the highest boost you had with the stock pumps before hitting a limp mode?

I'm doing my second engine rebuild cuz of cracked pistons so I've decided to get forged pistons and rods. The pistons were very hard to find but I found a company In China that makes them and the set had cost me around $500. I'm running the weistec downpipe, intake and have a meth kit. I'm not seeing much info on these cars running with meth but I believe these cars always have some knock issue and I just want to go that route. Where would be the suitable area to place nozzle?

Wossner has forged pistons for the M274 engine. For conrods, there are both good/bad reviews of the brand you intend to get. Best to just perform the counter weight tests to ensure they are all well balanced.
I have placed my nozzle just before the throttlebody, utilizing a throttle body plate to mount the nozzle.

where can I get H/Lpfp’s from?

2015 C300 lowered on BC Coils sitting on Ferrada 19x9.5 a custom 3 inch straight pipe from the turbo back and a stage 2 Tune, custom upgraded 270 amp alternator.

Looking to do a meth kit . Where is your boost vacuum source coming from for the meth kit

Those of you who installed Weistec downpipe or any other 'decat' DP, the smell doesn't bother you? I have 200cell and still the smell at cold start in the garage is too strong. no smell inside the cabin though

for me, I usually start the car and quickly drive off (slowly) and get the temps up, i don't usually leave the car idle for too long if the family or myself are not in the car.....

just curious what kit you are using for your meth set up . I’ve seen the ftp charge pipe with bung but everything I’ve seen says that’s not the ideal spot for it . Is it bad to go that route ? I’m awaiting my turbo kits.com turbo upgrade and thinking about meth to keep temps down . I’m not going custom tune , just using the amr tune offered through turbo kits.com since I’m already running their comport . I’m not looking for huge numbers mainly considering meth to safeguard the engine . Considering my goal you think the charge pipe would be ok? Also what did it take to tap your location post intercooler? Thanks and sorry for the noob questions .

I have the same opinion as you on placing the nozzle pre-intercooler, not ideal. You can think about placing a small cc nozzle (as part of a dual nozzle setup) for the purpose of bringing down the temps in the intercooler itself but I myself would not go too big on the nozzle size (<100cc should be sufficient). I went with the pre-throttle setup instead with a 600cc nozzle, you can find the throttle plate online and have a machine shop tap a location for the nozzle install.

I'm using a mix of products; the BMS 2 Gal tank, AEM v2 controller, ProMeth nozzles and fittings. Planning on a dual stage setup now with individual port injection.

Thanks for the info . I found you on ig and man your car and work you have done is impressive . Where did you get the throttle spacer? And was the set up pictures on the end tank not working for you ? Much appreciate you sharing your knowledge

i’ll send the link to you through IG.

Hey guys, i just came across this thread now while searching for a part. Iv done all this to my car already plus more. She runs great and she is reliable, i wouldnt say she runs anywhere close to the 400hp-600hp mark 😂, last time she was on a dyno she gave about 260hp at the wheels which is about 100hp over stock. I can get more out but i dont wanna break her, i think the engine is at its limit now. She has a lot of torque and rips hard, if im not careful the back slips out every time i put my foot down. Its a totally different car from standard once you've done all the mods and very fun to drive. If anyone needs help or info let me know. Here are some before and after pics.