The interesting reality is these numbers are only predictions - there is no specific hardware in the powertrain that can measure ACTUAL delivered engine torque. However, the predictions are extremely accurate so long as the mathematical model behind them is correct. Initially implemented as a series of 78 three dimensional "coefficient" tables located in the ECM, they have grown to become the cornerstone of everything from idle control, to boost control, and things like the way the accelerator pedal feels in the vehicle. The end result is commanded timing, throttle blade position, and a host of other things are directly affected by how much power the engine is predicted to be making. The so-called ECM power-reported numbers are the end result of these calculations.
These tables describe how manifold pressure, measured airflow, timing advance, and even the commanded fuel ratio affect the engine torque output under all operating conditions. As vehicles are modified away from the factory configuration, it is important to keep this model accurate by adjusting the coefficient tables.
Select Your Vehicle
-
Testimonials
WOW just WOW. I was giggling like a school girl. So I just received my cable and flashed the Advantage+ tune on my truck. Then took it for a spin. Pulled off my street and gave it…I will keep this short and to the point. Other than a Flowmaster muffler, my 2022 Colorado ZR2 truck is stock in regard to performance and drivetrain and tires. I couldn't be hap…Didn't know what to expect...but pleasantly surprised! While I definitely noticed a difference off the line with quicker acceleration and better throttle mapping (tune holds th…Really amazed at the difference in power with this tune. Never was a believer in tuners for gas engines before but I am a believer now. The power is greatly improved in the tune …I received the program today. The download and install went smooth. Now I have to wait for better weather here in Michigan to try it out. Thanks for the great service. HarryI've been running this tune on my 2013 Malibu LTZ for over 4 years now. From the moment I installed it I noticed a huge difference in power and responsiveness. If you want you…The instal was smooth and simple and It does what it says. This is not a subjective thing like a tune where one person might like something another does not. This is either disa…This Tune is AWESOME!! ive been running this tune for about 2 months. Its been great all around. The performance is a huge boost i also have an AEM air intake installed and the …Great Bang for the Buck Upgrade, 21 PSI boost makes a huger difference! Plus can turn on and off via cruise control if necessary.First of all I will say I very seldom write reviews. I purchased the advantage calibration for my 2018 Buick Regal Sportback. The Buick was sporty enough from the factory but I H…Five star service and support. I had some gremlins not related to product and Michael walked me through them.This woke up my truck! My 2014 GMC Sierra V6 4.3 used to be sluggish but after this I was able to make it go faster. It's not fast and the furious fast but just faster than what …WOW just WOW. I was giggling like a school girl. So I just received my cable and flashed the Advantage+ tune on my truck. Then took it for a spin. Pulled off my street and gave it…I will keep this short and to the point. Other than a Flowmaster muffler, my 2022 Colorado ZR2 truck is stock in regard to performance and drivetrain and tires. I couldn't be hap…Didn't know what to expect...but pleasantly surprised! While I definitely noticed a difference off the line with quicker acceleration and better throttle mapping (tune holds th…Really amazed at the difference in power with this tune. Never was a believer in tuners for gas engines before but I am a believer now. The power is greatly improved in the tune …I received the program today. The download and install went smooth. Now I have to wait for better weather here in Michigan to try it out. Thanks for the great service. HarryI've been running this tune on my 2013 Malibu LTZ for over 4 years now. From the moment I installed it I noticed a huge difference in power and responsiveness. If you want you…The instal was smooth and simple and It does what it says. This is not a subjective thing like a tune where one person might like something another does not. This is either disa…This Tune is AWESOME!! ive been running this tune for about 2 months. Its been great all around. The performance is a huge boost i also have an AEM air intake installed and the …Great Bang for the Buck Upgrade, 21 PSI boost makes a huger difference! Plus can turn on and off via cruise control if necessary.First of all I will say I very seldom write reviews. I purchased the advantage calibration for my 2018 Buick Regal Sportback. The Buick was sporty enough from the factory but I H…Five star service and support. I had some gremlins not related to product and Michael walked me through them.This woke up my truck! My 2014 GMC Sierra V6 4.3 used to be sluggish but after this I was able to make it go faster. It's not fast and the furious fast but just faster than what …prevnext -
By TRIFECTA Performance •
TRIFECTA: ECM Calculated Horsepower and TorqueFor years now, GM engine controller modules (ECMs) have had the necessity to determine how much torque the engine is making, largely for drivetrain "torque management" operations. These are called torque output predictions, and they became a heck of a lot more important once GM switched to "torque based" engine management strategies (in Delphi variants, first with the E83 controller, followed by the E39, then the E78 controller used in our LUJ/LUV Cruze and Sonic vehicles) - a switch that was needed to properly support factory turbocharged engines.
- 1
User Feedback
Recommended Comments
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.