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With the RENNtech ECU+ Upgrade the M276 - 43 AMG gains up to +41 HP and +62 LB-FT, based on power numbers measured by RENNtech. Please note that the Mercedes M276 engine performance when measured, obtains higher numbers than rated from factory. The maximum power number reached with the RENNtech ECU+ Upgrade for the M276 - 43 AMG is 416 HP and 460 LB-FT.
Note:
Mercedes M276 engine performance when measured, obtains higher numbers than rated from factory.
Power gains are calculated with stock numbers measured by RENNtech
Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC vehicles.
Our numbers will be dependent on conditions and fuel quality. 93+ Octane gasoline is mandatory with this Performance Upgrade.
What kind of dyne are you using? Have any other cars dyne's for comparison?
Your numbers are very peculiar. And I'm not even talking about the super random 17% figure you're using for DTL.
We have two in-house DynoJet dynos to test all our cars.
Most important are the power gains at the wheel. Which we show in our Dynograph.
For customers that want to compare the performance numbers to stock numbers, we provide crank horespower numbers, since Mercedes-Benz only publishes power at the crank.
We use a 17% drivetrain loss on 4MATIC vehicles, based on years of experience in testing Mercedes-Benz vehicles.
Originally Posted by Lionel_Hutz
Doesn't matter for most people west of the Mississippi anyhow, since they are pretty clear the tune cannot be run on 91 octane.
That is correct. Our full tune is developed for use with 93+ Octane. We want to make sure that every customer can reach our performance numbers and will not damage the engine.
Right? I have NEVER heard of anyone going below 20%. I want to hear the reasoning and not just some BS answer like "because of our years of experience blah blah blah..." c'mon guys.
Your dyno numbers are sketchy if you ask me.
Every other tuner is showing MUCH different whp numbers for the stock car; hell, some companies are showing less whp on their tune than you guys are measuring stock. You guys are a trusted company, at least I assume so for how long you've been in business, but this screams scam job to me...
I'm new the 'Mercedes World'; can you elaborate? From the 'Audi world' 22% is the norm.
Also, do you feel it is safe or unsafe to push pass the performance levels of your tune?
Hey OT real quick, I don't see a current car listed in your stable. You whipping any Audi's these days?
Audi fanboy here. I chose the 450 since the B8 S4 is dead and the B9 isn't out yet, but I gotta say, I think this Merc is changing my brand loyalty a bit. If they introduce the C63 with 4matic by the time this lease is up, I don't think I'm going to be going back to Audi anytime soon
Hey OT real quick, I don't see a current car listed in your stable. You whipping any Audi's these days?
Audi fanboy here. I chose the 450 since the B8 S4 is dead and the B9 isn't out yet, but I gotta say, I think this Merc is changing my brand loyalty a bit. If they introduce the C63 with 4matic by the time this lease is up, I don't think I'm going to be going back to Audi anytime soon
Didn't want the supercharged S4? I actually enjoyed the b8.5. I did miss turbo so I built a turbo car. Then ended up trading in for the merc
Hey OT real quick, I don't see a current car listed in your stable. You whipping any Audi's these days?
Audi fanboy here. I chose the 450 since the B8 S4 is dead and the B9 isn't out yet, but I gotta say, I think this Merc is changing my brand loyalty a bit. If they introduce the C63 with 4matic by the time this lease is up, I don't think I'm going to be going back to Audi anytime soon
I currently don't have a ride. We are buying a house so we use my fiancées car. I was a major Audi fan. For the north east; they are superb all weather vehicles and I'm sure you know that. The A4's got me through some of the worse winter storms here in New York. Had winter tires on the S5; it was unstoppable. I gave the Q7 to my X but it was sweet for what it was. That thing crushed in winter and was solid (300 shy of 6000lbs). The performance was good but always struggled with the understeer even with changing the entire suspension. However, non of those reasons was why I didn't get another one; I just wanted to try something different. So enter the Ghibli ( Mistake) after all the glamour wears off your stuck with great handing piece of tin. It was not put together well.
So I arrive to now and I'm digging the new MB's as I don't like the interiors of the newer Audi's, something just seems too cold but are great, techy and edgy. As I have analyzed this; I realize I'm getting older and I think this is playing a roll now as the MB interior is just more comfortable for me.
So I'm on the fence about a C63 or C43. I have test driven both but not back to back. I want the V8 but want the AWD. Great problem to have tho. I think I will be back at Audi because my fiancé likes the them so her next car will likely be one.
That's true. Luckily the failure rate for the later S4 was pretty darn low. They got the mechatronic issues figured out and they have been good.
Yup that's what community looked like I didn't see many issues. However, for me it would have been like getting into a slightly smaller S5 interior lol.
I currently don't have a ride. We are buying a house so we use my fiancées car. I was a major Audi fan. For the north east; they are superb all weather vehicles and I'm sure you know that. The A4's got me through some of the worse winter storms here in New York. Had winter tires on the S5; it was unstoppable. I gave the Q7 to my X but it was sweet for what it was. That thing crushed in winter and was solid (300 shy of 6000lbs). The performance was good but always struggled with the understeer even with changing the entire suspension. However, non of those reasons was why I didn't get another one; I just wanted to try something different. So enter the Ghibli ( Mistake) after all the glamour wears off your stuck with great handing piece of tin. It was not put together well.
So I arrive to now and I'm digging the new MB's as I don't like the interiors of the newer Audi's, something just seems too cold but are great, techy and edgy. As I have analyzed this; I realize I'm getting older and I think this is playing a roll now as the MB interior is just more comfortable for me.
So I'm on the fence about a C63 or C43. I have test driven both but not back to back. I want the V8 but want the AWD. Great problem to have tho. I think I will be back at Audi because my fiancé likes the them so her next car will likely be one.
Okay rant over.
Back on topic
buy the c43 and get the AMR tune and have the best of both worlds and save 20k
Last edited by White C400; 01-20-2017 at 09:25 PM.
Didn't want the supercharged S4? I actually enjoyed the b8.5. I did miss turbo so I built a turbo car. Then ended up trading in for the merc
I don't necessarily hate the s/c V6, but I don't really like it. I like the efficiency of turbo's compared to a blower any day.
And even though the B8.5 is a nice car, I'd hate seeing the B9 come out in just a few months. If I'm going to spend the money, I want the new new.
Originally Posted by White C400
buy the c43 and get the AMR tune and have the best of both worlds and save 20k
No joke!
My car struggles from time to time to maintain traction (especially so when the tires are cold) even with the AWD. I can't imagine what it's like to try to constantly wrangle the back end of the 63. I would have LOOOOVED the V8, but RWD just isn't feasible for me.
I really want to find a local c63/c63s and do some highway pulls. I know I would walk one from a standstill but I want to see if the top end is in my favor now. [Que c63 fanboys in 5..4..3.......]
I don't necessarily hate the s/c V6, but I don't really like it. I like the efficiency of turbo's compared to a blower any day.
And even though the B8.5 is a nice car, I'd hate seeing the B9 come out in just a few months. If I'm going to spend the money, I want the new new.
No joke!
My car struggles from time to time to maintain traction (especially so when the tires are cold) even with the AWD. I can't imagine what it's like to try to constantly wrangle the back end of the 63. I would have LOOOOVED the V8, but RWD just isn't feasible for me.
I really want to find a local c63/c63s and do some highway pulls. I know I would walk one from a standstill but I want to see if the top end is in my favor now. [Que c63 fanboys in 5..4..3.......]
Given the awd, I'd say that in most conditions you would pull for a bit. However I just did a race launch today on some dry asphalt and I can say this car pulled as hard as the S4. Had very minimal slip. But you don't find good and dry pavement too often around here.
I don't necessarily hate the s/c V6, but I don't really like it. I like the efficiency of turbo's compared to a blower any day.
And even though the B8.5 is a nice car, I'd hate seeing the B9 come out in just a few months. If I'm going to spend the money, I want the new new.
No joke!
My car struggles from time to time to maintain traction (especially so when the tires are cold) even with the AWD. I can't imagine what it's like to try to constantly wrangle the back end of the 63. I would have LOOOOVED the V8, but RWD just isn't feasible for me.
I really want to find a local c63/c63s and do some highway pulls. I know I would walk one from a standstill but I want to see if the top end is in my favor now. [Que c63 fanboys in 5..4..3.......]
id also say it depends on the driver! I'd say some of us wouldn't have an issue, especially with the wider tires now. And if not then after a few seconds you'll hear that lovely V8 roll right on by.
buy the c43 and get the AMR tune and have the best of both worlds and save 20k
This seems to come to my mind a lot. However, the small voice says " it will never sound like a V8'. There is something really wrong with us all . Just this morning i was thinking "it will be fine with winter tires?".
I just wonder why Renntech is so much different than AMR and vice versa; in relation to these tunes.
This seems to come to my mind a lot. However, the small voice says " it will never sound like a V8'. There is something really wrong with us all . Just this morning i was thinking "it will be fine with winter tires?".
I just wonder why Renntech is so much different than AMR and vice versa; in relation to these tunes.
Is It because renntech wants to still be endorsed by dealerships.
So you are saying that the c43 will make faster 1/4 mile passes?
01-19-2017, 11:59 AM
. I think I will be back at Audi because my fiancé likes the them 
so her next car will likely be one.
]
. There is something really wrong with us all 
. Just this morning i was thinking "it will be fine with winter tires?".
