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.
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I purchased my 2014 Malibu in September 2018 because I love the styling of the LTZ. I Found this site online through a Malibu Turbo forum site. Didn't think it was a real upgra…Easy to order, easy to download and set up. Great, quick answers to questions I had. I ordered it. It arrived. So, I dragged my feet for several days. After all, I was do…I have been driving my eco cruze with this tune for nearly a week now and everyday I am stunned at the difference in pick up. It's like driving a new car. Every gear has power, e…I could pretty much mirror and repeat what alot of people have said already. I waited a while to purchase cause I wasn't sure and this is the best car performance purchase I ha…I have a 2019 Chevy Blazer RS and have owned the vehicle for one year and finally I had enough of the Auto-Start Stop and decided I’d like a little more horsepower in the proces…This tune is awesome. It REALLY wakes up the truck and no more slow throttle response - it's instant now. It really fixes the gearing as well. I highly recommend it!As we all know the VSport is a great car straight from the factory. When you add the Trifecta tune it turns the car into a beast. My experience from purchase to install has been no…I have a 2016 Colorado Z71 V6 with 6 speed automatic, 2wheel drive. I really like everything about this midsized truck except the automatic transmission! I have 20000 miles on it a…Looking Forward to this !! phil d Mukilteo waThis is the way this car should have come from the factory. Afrer the tune it is so much more fun to drive. Very happy with the tune and highly recommend it to anyone looking to …The tune is nice. At first I didn't notice much of a difference. I didn't notice the way it shifts gears. MUCH BETTER. Keeps me right in my power band after every shift.Car has been totally transformed and driving enjoyment is very noticeable. For anyone contemplating this, do your homework and make sure your expectations are realistic. The tu…I purchased my 2014 Malibu in September 2018 because I love the styling of the LTZ. I Found this site online through a Malibu Turbo forum site. Didn't think it was a real upgra…Easy to order, easy to download and set up. Great, quick answers to questions I had. I ordered it. It arrived. So, I dragged my feet for several days. After all, I was do…I have been driving my eco cruze with this tune for nearly a week now and everyday I am stunned at the difference in pick up. It's like driving a new car. Every gear has power, e…I could pretty much mirror and repeat what alot of people have said already. I waited a while to purchase cause I wasn't sure and this is the best car performance purchase I ha…I have a 2019 Chevy Blazer RS and have owned the vehicle for one year and finally I had enough of the Auto-Start Stop and decided I’d like a little more horsepower in the proces…This tune is awesome. It REALLY wakes up the truck and no more slow throttle response - it's instant now. It really fixes the gearing as well. I highly recommend it!As we all know the VSport is a great car straight from the factory. When you add the Trifecta tune it turns the car into a beast. My experience from purchase to install has been no…I have a 2016 Colorado Z71 V6 with 6 speed automatic, 2wheel drive. I really like everything about this midsized truck except the automatic transmission! I have 20000 miles on it a…Looking Forward to this !! phil d Mukilteo waThis is the way this car should have come from the factory. Afrer the tune it is so much more fun to drive. Very happy with the tune and highly recommend it to anyone looking to …The tune is nice. At first I didn't notice much of a difference. I didn't notice the way it shifts gears. MUCH BETTER. Keeps me right in my power band after every shift.Car has been totally transformed and driving enjoyment is very noticeable. For anyone contemplating this, do your homework and make sure your expectations are realistic. The tu…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.
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