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
Just wanted to let you guys know that the tuner program works awesome. I just got my best 25 mile average fuel mileage last week. 64.2 mpg on your tuner, up from 62.8 mpg on the fa…Big difference! Especially in throttle response. Made the little Trax a lot more fun to drive. Averaged about 1-2 mpg on economy mode on long distances. Wish there were more toys f…I have 2017 Malibu LT Advantage tune. And money well spent on this tune. After months of having the tune on my car, I enjoyed every moments I get to drive my car and still en…I received the Trifecta cable and download about one week after I ordered it. When the cable came I then went into my e-mail and found Trifecta had also sent the download links…So far I love it. Ive got after market stock internals on a 8+k mile rebuild that i did my self, been working on my own vehicles since I was 17, im 25(26 on February 20th), and o…I purchased this tune earlier this week and it arrived on Thursday afternoon, very timely. I tried to install it using a coworkers PC and it didn't go through and I got very nervou…i have a 2019 redline 2.0 equinox turbo and purchased the trifecta tune im curently modded before the tune. After the tune what a world of difference. feels like a rocket. spins…Thank you for the Tune. Really easy to download and install to the car was finished in about 8 minutes total. Not only do I feel the car is responding much more to my liking but y…I have been doing lots of research and trying to find the best solution to tune my Sonic 1.4 L Turbo. It's a great car, but I just want to get more power out of the Turbo engine.…1st: Fast shipping 2nd: Easy to install 3rd: Really impressive! The product is really impressive and powerful. If you think than your stock 2.0T is faster, with the trifecta …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…Holy Smokes!!!! Let me tell you about my Trifecta Performance Tuned 2016 GMC Canyon 3.6L. #1) Transmission shifting points are now spot on and not searching all over creation for… -
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.
User Feedback
Recommended Comments
There are no comments to display.
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.