What is breaking on maxed out stock motors?
Thread Starter
Junior Member
Joined: Mar 2021
Posts: 15
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From: Columbia, MD
2006 E55
What is breaking on maxed out stock motors?
I'm a bit new to the M113K platform and I've read the stock motors' longevity are greatly reduced at around the 600whp range and start popping over that threshold. My question is what is failing over the 600whp mark, ring lands, bearings, rods, etc sufficient the tune was solid?
Anyone making 550+whp that's got some mileage on their set-ups? I would certainly like as much power as the car can muster but reliability takes precedence over ultimate output. Thank you for anyone's input.
Anyone making 550+whp that's got some mileage on their set-ups? I would certainly like as much power as the car can muster but reliability takes precedence over ultimate output. Thank you for anyone's input.
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Joined: Mar 2005
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From: America
1999 C43 AMG, 2005 E55 Wagon
As far as I know the common failures are ringland and specifically in cylinder 8.
I hate Facebook, but there's a couple big AMG groups on there with thousands of people who are currently still doing lots of m113k builds. Might get more info there, combined with a bunch of salt and extremely unhelpful comments that make people not want to be a car person anymore.
I hate Facebook, but there's a couple big AMG groups on there with thousands of people who are currently still doing lots of m113k builds. Might get more info there, combined with a bunch of salt and extremely unhelpful comments that make people not want to be a car person anymore.
MBWorld Fanatic!
Joined: Jul 2014
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2005 e55 AMG
Pistons for sure. First the ring gaps are tight so under high heat and pressure they expand and but up against each other...than the lands break. Second the pistons , although are Mahle and great quality, are cast and will not hold up to long term abuse and that could be years for many including my self.
Cylinder 8 is not a problem really. It's the fueling to that specific cylinder that causes problems. Like Sulaco said lot's of people building them just have to hunt them out. I learned a lot from Chris, Sirboostalot and this guy really knows his stuff.
Cylinder 8 is not a problem really. It's the fueling to that specific cylinder that causes problems. Like Sulaco said lot's of people building them just have to hunt them out. I learned a lot from Chris, Sirboostalot and this guy really knows his stuff.
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04 E55 AMG (totaled), 07 S550 4Matic, 14 E63S
Pistons for sure. First the ring gaps are tight so under high heat and pressure they expand and but up against each other...than the lands break. Second the pistons , although are Mahle and great quality, are cast and will not hold up to long term abuse and that could be years for many including my self.
Cylinder 8 is not a problem really. It's the fueling to that specific cylinder that causes problems. Like Sulaco said lot's of people building them just have to hunt them out. I learned a lot from Chris, Sirboostalot and this guy really knows his stuff.
Cylinder 8 is not a problem really. It's the fueling to that specific cylinder that causes problems. Like Sulaco said lot's of people building them just have to hunt them out. I learned a lot from Chris, Sirboostalot and this guy really knows his stuff.
My opinion is if the rings butt and it breaks a land, that's not because of "weak pistons.". Similarly, detonation can destroy even race pistons. They'll just handle more abuse before finally becoming vented.
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MBWorld Fanatic!
Joined: Mar 2005
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From: America
1999 C43 AMG, 2005 E55 Wagon
Oh yeah, didn't they also do the same with adding a turbo and some parts to a mostly stock 5.7 hemi truck motor? I want to say they were right over 1400hp as well
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Thread Starter
Junior Member
Joined: Mar 2021
Posts: 15
Likes: 2
From: Columbia, MD
2006 E55
I had an LS3 C6 but the Vette tax made everything very expensive even compared to a Benz. I wanted to do so many different projects, a 5.3 turbo truck, a fbo Coyote, etc. but this car suits me best with its features.
