M157 and M278 IAT's and Summer months: Issues?
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From: Southern Cali (Ontario)
M157 and M278 IAT's and Summer months: Issues?
Gent's I moved over from kompressor to turbos...for now keeping the coupe for 18 months until i can pick up a CPO 2012 E63..
I plan to tune, swap wheels to 18" W212 E63 wheels and slight drop... then it will be time to let go.
So I will post here, figure most of you had exposure lots of forced induction cars.
Based on E550 coupe community, summer was not an issue last year and according a few postings.. they didn't see a drop of "performance"
Since the car does not have a dedicated heat exchanger and it shares the coolant with the radiator set up. Unless I have not done my research correctly, I see this as a big issue for cars that would increase boost by tuning.
So I plan to start recording IAT's before and after tuning..
Any data logging of IAT with the M157 stock and tune?
Does your car have a dedicated heat exchanger that send coolant to the IC core?
Or does the M157 intercooler share coolant with the engine?
separating both system should be worth while OR modifying the T-stat to open sooner.. just ideas.
I plan to tune, swap wheels to 18" W212 E63 wheels and slight drop... then it will be time to let go.
So I will post here, figure most of you had exposure lots of forced induction cars.
Based on E550 coupe community, summer was not an issue last year and according a few postings.. they didn't see a drop of "performance"
Since the car does not have a dedicated heat exchanger and it shares the coolant with the radiator set up. Unless I have not done my research correctly, I see this as a big issue for cars that would increase boost by tuning.
So I plan to start recording IAT's before and after tuning..
Any data logging of IAT with the M157 stock and tune?
Does your car have a dedicated heat exchanger that send coolant to the IC core?
Or does the M157 intercooler share coolant with the engine?
separating both system should be worth while OR modifying the T-stat to open sooner.. just ideas.
Senior Member
Joined: Mar 2016
Posts: 341
Likes: 55
2014 E63 S model
Gent's I moved over from kompressor to turbos...for now keeping the coupe for 18 months until i can pick up a CPO 2012 E63..
I plan to tune, swap wheels to 18" W212 E63 wheels and slight drop... then it will be time to let go.
So I will post here, figure most of you had exposure lots of forced induction cars.
Based on E550 coupe community, summer was not an issue last year and according a few postings.. they didn't see a drop of "performance"
Since the car does not have a dedicated heat exchanger and it shares the coolant with the radiator set up. Unless I have not done my research correctly, I see this as a big issue for cars that would increase boost by tuning.
So I plan to start recording IAT's before and after tuning..
Any data logging of IAT with the M157 stock and tune?
Does your car have a dedicated heat exchanger that send coolant to the IC core?
Or does the M157 intercooler share coolant with the engine?
separating both system should be worth while OR modifying the T-stat to open sooner.. just ideas.
I plan to tune, swap wheels to 18" W212 E63 wheels and slight drop... then it will be time to let go.
So I will post here, figure most of you had exposure lots of forced induction cars.
Based on E550 coupe community, summer was not an issue last year and according a few postings.. they didn't see a drop of "performance"
Since the car does not have a dedicated heat exchanger and it shares the coolant with the radiator set up. Unless I have not done my research correctly, I see this as a big issue for cars that would increase boost by tuning.
So I plan to start recording IAT's before and after tuning..
Any data logging of IAT with the M157 stock and tune?
Does your car have a dedicated heat exchanger that send coolant to the IC core?
Or does the M157 intercooler share coolant with the engine?
separating both system should be worth while OR modifying the T-stat to open sooner.. just ideas.
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,841
Likes: 202
From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
I have a 2014 e63 S. The turbo and engine cooling systems are separate from factory. I have upgraded turbos. I use an obd2 reader app which shows me running approximately 20 pounds of boost at wot and sufficient rpm. My IATs go down to near ambient at wot and creep up when driving slowly or idling in traffic. It was winter time and outdoor temps were about 32F. The WOT runs were very brief, not enough to really test the cooling system.
Senior Member
Joined: Mar 2016
Posts: 341
Likes: 55
2014 E63 S model
Weistec w.3. Conservative tune. Factory exhaust. I haven't found a dyno that works with awd.
Using the same torque app I can do virtual dyno runs. It measures the speed from the ECU and calculates acceleration and from there using the vehicle weight that you enter it can calculate a wheel horsepower value.
I entered 2000kg including my own weight. With that value I got 633.4hp at 4831rpm in third gear. I did not go to 6000rpm, in fact I was practicing launches I didn't realize it was recording these horsepower values. I assume wind resistance is not accounted for and I doubt there is sae correction or uphill/downhill, rolling resistance.
Power = force x velocity. These variables are measured directly on a dyno. Force = mass x acceleration, acceleration is calculated by app (delta v / t) and velocity is used in both acceleration calculation and power calculation. Its all done by the phone processor. Any momentary error in velocity value could mess up the max hp number. I think if I had done a graph instead of a max static value I could be more confident of the result as a momentary error should show up as a spike on the graph.
Using the same torque app I can do virtual dyno runs. It measures the speed from the ECU and calculates acceleration and from there using the vehicle weight that you enter it can calculate a wheel horsepower value.
I entered 2000kg including my own weight. With that value I got 633.4hp at 4831rpm in third gear. I did not go to 6000rpm, in fact I was practicing launches I didn't realize it was recording these horsepower values. I assume wind resistance is not accounted for and I doubt there is sae correction or uphill/downhill, rolling resistance.
Power = force x velocity. These variables are measured directly on a dyno. Force = mass x acceleration, acceleration is calculated by app (delta v / t) and velocity is used in both acceleration calculation and power calculation. Its all done by the phone processor. Any momentary error in velocity value could mess up the max hp number. I think if I had done a graph instead of a max static value I could be more confident of the result as a momentary error should show up as a spike on the graph.
Super Member
Joined: Nov 2015
Posts: 773
Likes: 44
C300
Weistec w.3. Conservative tune. Factory exhaust. I haven't found a dyno that works with awd.
Using the same torque app I can do virtual dyno runs. It measures the speed from the ECU and calculates acceleration and from there using the vehicle weight that you enter it can calculate a wheel horsepower value.
I entered 2000kg including my own weight. With that value I got 633.4hp at 4831rpm in third gear. I did not go to 6000rpm, in fact I was practicing launches I didn't realize it was recording these horsepower values. I assume wind resistance is not accounted for and I doubt there is sae correction or uphill/downhill, rolling resistance.
Power = force x velocity. These variables are measured directly on a dyno. Force = mass x acceleration, acceleration is calculated by app (delta v / t) and velocity is used in both acceleration calculation and power calculation. Its all done by the phone processor. Any momentary error in velocity value could mess up the max hp number. I think if I had done a graph instead of a max static value I could be more confident of the result as a momentary error should show up as a spike on the graph.
Using the same torque app I can do virtual dyno runs. It measures the speed from the ECU and calculates acceleration and from there using the vehicle weight that you enter it can calculate a wheel horsepower value.
I entered 2000kg including my own weight. With that value I got 633.4hp at 4831rpm in third gear. I did not go to 6000rpm, in fact I was practicing launches I didn't realize it was recording these horsepower values. I assume wind resistance is not accounted for and I doubt there is sae correction or uphill/downhill, rolling resistance.
Power = force x velocity. These variables are measured directly on a dyno. Force = mass x acceleration, acceleration is calculated by app (delta v / t) and velocity is used in both acceleration calculation and power calculation. Its all done by the phone processor. Any momentary error in velocity value could mess up the max hp number. I think if I had done a graph instead of a max static value I could be more confident of the result as a momentary error should show up as a spike on the graph.
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,841
Likes: 202
From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
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Super Member
Joined: Nov 2015
Posts: 773
Likes: 44
C300
аgree , exhaust what makes the different , so he using 40 % of the turbochargers potential
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Senior Member
Joined: Mar 2016
Posts: 341
Likes: 55
2014 E63 S model
I think there is a plenty to be gained by exhaust and higher octane tune... and revving to 5.5k at least. I had measured this inadvertently while timing my 0-60mph with different launch methods, which is not an ideal way to measure peak rwhp. I think there is also a torque limitation that might be limited to lower gears/speeds. Allowing for all this I think that number is close to what I am making at the wheels with my setup.
Last edited by e65; Mar 13, 2016 at 06:20 PM.
