Fastest W205 C300
Thread Starter
Newbie
Joined: Apr 2018
Posts: 3
Likes: 1
From: St. Petersburg Florida
2015 C300 W205
Fastest W205 C300
Hey everyone,
I have a 2015 Mercedes C300 that’s in the shop right now because of a blown engine and turbo. I’m having the same 2.0L I4 engine put back in, but pure turbos are building me custom turbo internals that are stage 2. After the engine, turbo, and a new Weistec downpipe are put in the car is going to get tuned. I should have about just shy of 400 crank horsepower. I am very curious if anyone has beaten this number with a W205 C300. If so I’d love to hear about your setup.
I have a 2015 Mercedes C300 that’s in the shop right now because of a blown engine and turbo. I’m having the same 2.0L I4 engine put back in, but pure turbos are building me custom turbo internals that are stage 2. After the engine, turbo, and a new Weistec downpipe are put in the car is going to get tuned. I should have about just shy of 400 crank horsepower. I am very curious if anyone has beaten this number with a W205 C300. If so I’d love to hear about your setup.
Thread Starter
Newbie
Joined: Apr 2018
Posts: 3
Likes: 1
From: St. Petersburg Florida
2015 C300 W205
I actually had an oil leak while running the car at a rpm and speed it probably shouldn’t have been at at the time, because I was misfiring out of cylinder 1. But basically the car ran itself out of oil and caused the motor and turbo to seize. I haven’t exactly got a straight answer yet out of what caused it but I was told it was caused internally and not by aftermarket parts that I had on at the time
Member
Joined: Feb 2016
Posts: 75
Likes: 5
W205 C250
My opinion is that there is no way to safely hit 400hp (not even less than 300hp) without upgrading engine internals like rods and pistons. You can check SKN tuner from Switzerland, they did managed to push it to 400hp. but with serious engine upgrades.
Newbie
Joined: Nov 2023
Posts: 3
Likes: 0
2015 C300
Its possible
Hey everyone,
I have a 2015 Mercedes C300 that’s in the shop right now because of a blown engine and turbo. I’m having the same 2.0L I4 engine put back in, but pure turbos are building me custom turbo internals that are stage 2. After the engine, turbo, and a new Weistec downpipe are put in the car is going to get tuned. I should have about just shy of 400 crank horsepower. I am very curious if anyone has beaten this number with a W205 C300. If so I’d love to hear about your setup.
I have a 2015 Mercedes C300 that’s in the shop right now because of a blown engine and turbo. I’m having the same 2.0L I4 engine put back in, but pure turbos are building me custom turbo internals that are stage 2. After the engine, turbo, and a new Weistec downpipe are put in the car is going to get tuned. I should have about just shy of 400 crank horsepower. I am very curious if anyone has beaten this number with a W205 C300. If so I’d love to hear about your setup.
So I am at just 400hp with no internals changed except valve springs and let me tell you I have so many issues with my gearbox. Here is my setup
1. tornado tuning intercooler
2. tornado tuning Charge pipe
3. tornado tuning catless down pipe
4. tornado tuning turbo intake pipe
5. carbon fiber intake pipes
6. tornado tuning cold air intake
7. Turbo kits.com 59mm turbo with coated manifold
8. AMR stage 3 tune
9. AMR transmission tune
10. brand new 722.9 transmission
11. Tornado tuning high performance coil packs
12. turbo kits.com valve springs.
13. GFB BOV (because recirculating 32psi can cause turbo lifespan issues)
make sure you have a good tune on that transmission because the 722.9 from the c43 does not play nice so the factory transmission is the only option.
Trending Topics
Senior Member
Joined: Feb 2018
Posts: 333
Likes: 102
2019 CLS450 (C257)
Sorry I know im late to the party here.
So I am at just 400hp with no internals changed except valve springs and let me tell you I have so many issues with my gearbox. Here is my setup
1. tornado tuning intercooler
2. tornado tuning Charge pipe
3. tornado tuning catless down pipe
4. tornado tuning turbo intake pipe
5. carbon fiber intake pipes
6. tornado tuning cold air intake
7. Turbo kits.com 59mm turbo with coated manifold
8. AMR stage 3 tune
9. AMR transmission tune
10. brand new 722.9 transmission
11. Tornado tuning high performance coil packs
12. turbo kits.com valve springs.
13. GFB BOV (because recirculating 32psi can cause turbo lifespan issues)
make sure you have a good tune on that transmission because the 722.9 from the c43 does not play nice so the factory transmission is the only option.
So I am at just 400hp with no internals changed except valve springs and let me tell you I have so many issues with my gearbox. Here is my setup
1. tornado tuning intercooler
2. tornado tuning Charge pipe
3. tornado tuning catless down pipe
4. tornado tuning turbo intake pipe
5. carbon fiber intake pipes
6. tornado tuning cold air intake
7. Turbo kits.com 59mm turbo with coated manifold
8. AMR stage 3 tune
9. AMR transmission tune
10. brand new 722.9 transmission
11. Tornado tuning high performance coil packs
12. turbo kits.com valve springs.
13. GFB BOV (because recirculating 32psi can cause turbo lifespan issues)
make sure you have a good tune on that transmission because the 722.9 from the c43 does not play nice so the factory transmission is the only option.
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
Newbie
Joined: Nov 2023
Posts: 3
Likes: 0
2015 C300
Senior Member
Joined: Feb 2018
Posts: 333
Likes: 102
2019 CLS450 (C257)
Just trying to set realistic expectations..... its definitely not easy to hit 400hp (and also depending on whether its on wheel or on the crank)... even with the Turbokits hybrid turbo.
you would need something larger like a Borg Warner EFR 6758 with meth and a lot of boost to get there... OR... if you are using Ethanol fuel to bump up the power.
So far with those who have extensively modded their rides, there is a substantially higher torque which they will feel, but it doesnt constitute the higher hp since the torque is more low to mid rpm and dropping off thereafter at the higher rpms.
Cheers!
Newbie
Joined: Nov 2023
Posts: 3
Likes: 0
2015 C300
Cool, keep us updated!
Just trying to set realistic expectations..... its definitely not easy to hit 400hp (and also depending on whether its on wheel or on the crank)... even with the Turbokits hybrid turbo.
you would need something larger like a Borg Warner EFR 6758 with meth and a lot of boost to get there... OR... if you are using Ethanol fuel to bump up the power.
So far with those who have extensively modded their rides, there is a substantially higher torque which they will feel, but it doesnt constitute the higher hp since the torque is more low to mid rpm and dropping off thereafter at the higher rpms.
Cheers!
Just trying to set realistic expectations..... its definitely not easy to hit 400hp (and also depending on whether its on wheel or on the crank)... even with the Turbokits hybrid turbo.
you would need something larger like a Borg Warner EFR 6758 with meth and a lot of boost to get there... OR... if you are using Ethanol fuel to bump up the power.
So far with those who have extensively modded their rides, there is a substantially higher torque which they will feel, but it doesnt constitute the higher hp since the torque is more low to mid rpm and dropping off thereafter at the higher rpms.
Cheers!
Stock HP 241
1. intake: +10 = 251hp
2. catless downpipe + 15hp = 266hp
3. Turbo kit turbo + 80 hp = 346hp
4. stage 3 amr tune +30hp = 376hp
5. downpipes back exhaust + 10hp =386hp
so he figures we are sitting at 386hp at the crank are these figures unrealistic and why? Obviously the dyno will answer that but on my 335xi when I lived closer to town we dynoed after each mod and made a bit higher for each one of the mods above. like 15hp for intake and 25hp for the catless pipe, 50hp for the tune and so on... thank you for setting me straight either way.
