All GT’s have same engine?
Thread Starter
Senior Member
Joined: Jul 2008
Posts: 436
Likes: 64
From: Dartmouth, MA
1967 250SE, 2022 GLC300 2023 EQB300, 2018 AMG GT
All GT’s have same engine?
Apparently all GT’s, base, S, C and R have the same engine, right? So using engine ECU chip from a R can bring another 100 HP to a base GT? Or there are other needs?
SPONSOR
Joined: Apr 2021
Posts: 1,569
Likes: 475
From: Scottsdale, Arizona
2001 E55AMG
No, it the differences are more than just a tune.
"Base AMG GT / GT S: These models feature lower horsepower ratings, ranging from roughly 456 hp to 510 hp (340–375 kW).
AMG GT C / GT R: These models feature upgraded turbochargers, different tuning, and higher output, reaching up to 577 hp (430 kW).
AMG GT Black Series: This version features the most significant changes, often designated by the internal code M178 LS2. It features a flat-plane crank (rather than the cross-plane crank in other M178s), larger turbochargers, new camshafts, and a new exhaust manifold to support 720+ horsepower."
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
"Base AMG GT / GT S: These models feature lower horsepower ratings, ranging from roughly 456 hp to 510 hp (340–375 kW).
AMG GT C / GT R: These models feature upgraded turbochargers, different tuning, and higher output, reaching up to 577 hp (430 kW).
AMG GT Black Series: This version features the most significant changes, often designated by the internal code M178 LS2. It features a flat-plane crank (rather than the cross-plane crank in other M178s), larger turbochargers, new camshafts, and a new exhaust manifold to support 720+ horsepower."
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
Thread Starter
Senior Member
Joined: Jul 2008
Posts: 436
Likes: 64
From: Dartmouth, MA
1967 250SE, 2022 GLC300 2023 EQB300, 2018 AMG GT
No, it the differences are more than just a tune.
"Base AMG GT / GT S: These models feature lower horsepower ratings, ranging from roughly 456 hp to 510 hp (340–375 kW).
AMG GT C / GT R: These models feature upgraded turbochargers, different tuning, and higher output, reaching up to 577 hp (430 kW).
"Base AMG GT / GT S: These models feature lower horsepower ratings, ranging from roughly 456 hp to 510 hp (340–375 kW).
AMG GT C / GT R: These models feature upgraded turbochargers, different tuning, and higher output, reaching up to 577 hp (430 kW).
Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,342
From: San Francisco Bay Area
2019 C63CS
Sort of and at a shortened engine life. Pistons are different for the various power levels to achieve different compression ratios and the higher output engines have forged pistons, whereas the lower output engines don't. An ECU tune eats into the engine's internal components headroom and will invariably shorten their lifetime w/o upgrading the internal parts to handle the additional power and not sacrificing reliability.
Last edited by superswiss; Apr 19, 2026 at 10:13 PM.
Thread Starter
Senior Member
Joined: Jul 2008
Posts: 436
Likes: 64
From: Dartmouth, MA
1967 250SE, 2022 GLC300 2023 EQB300, 2018 AMG GT
You are right. I was hopping the engines were built for maximum stresses possible. I don’t track the car but it would be nice to have another 100 HP when you get challenged by BMW M on the road. These roads are not straight like in CO and there are a lot of drivers so you have a very short window to show yours is longer
.
.Last edited by gafitanu; Apr 19, 2026 at 08:15 PM. Reason: Misspelling
MBWorld Fanatic!
Joined: Oct 2007
Posts: 2,299
Likes: 380
From: Texas
10 C six trizzle
Turbos are a different part number for gtc/gtr comparted to gt and gts but look identical. probably 5% more flow or something negligible. Gt black are way bigger. completely different animal.
Super Moderator
Joined: May 2002
Posts: 10,544
Likes: 3,675
From: Land of 10,000 lakes
AMG GTC Roadster, E63s Ed.1, M8 Comp. Coupe
The GT and GTS have the engine setup & turbos, then GTC and GTR but your engine can easily be tuned. No turbos needed for just 100hp. A tune can do that something like that. The original GT already went from 456hp to 469hp to 523hp (in 2021) from factory alone.
Trending Topics
MBWorld Fanatic!
Joined: Jun 2021
Posts: 3,119
Likes: 1,354
From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
You are right. I was hopping the engines were built for maximum stresses possible. I don’t track the car but it would be nice to have another 100 HP when you get challenged by BMW M on the road. These roads are not straight like in CO and there are a lot of drivers so you have a very short window to show yours is longer.
.MB World Stories
The Best of Mercedes & AMG
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
