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Originally Posted by rearden82
From my understanding, torque management typically involves programming the PCM to reduce engine power during gear changes. This makes the shifts feel smoother while also reducing wear and tear on the transmission. But aside from when the tranny is in between gears, full power is available at all times.
Based on the Edmunds review and other reports, the new GM pickups apparently run in a "reduced power" mode all the time unless you floor it for more than 4 seconds. Most likely it's for enhanced fuel economy and/or drivetrain longevity, but I don't know for sure. Regardless I think it is BS, since the engine is basically crippled and putting out far less than its advertised power in 99% of real-world driving conditions.
Hopefully Mike@Diablo will be able to shed more light on the subject. I have a Diablo chip in my Mark VIII (which was tuned by Lincoln Motorsport), and I am very satisfied with it. I noticed a significant improvement in low-end torque and transmission behavior. If it works as well on GM trucks, I would definitely recommend their products.
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TM is basically GM's way of putting an end to the fun before it gets started. There are several different scenarios that bring TM into play. Among these are 'abusive launches' and WOT upshifts/downshifts. When TM is enabled, the PCM thinks you are being abusive, and either pulls timing or closes the throttle body on ETC trucks to kill power. You may drive forever without ever realizing what TM is or does, until you experience a vehicle back-to-back with the TM removed....major difference. Suddenly wheelspin is available at low speeds and WOT upshifts feel much stronger and will produce wheelspin as well. Applying the tunes we make available improve the throttle response in these electronic throttle body vehicles drastically...if you command WOT with your right foot, you get WOT, not what the PCM feels like giving you!
In regards to discussion of a 'delay' in power coming on, some of these GM trucks actually do have a lengthy delay before the PCM will allow you to go into power enrichment mode, meaning you are missing out on alot of acceleration. We recently tested an 07 VortecMax on our dyno, and besides the 25rwhp gains up top, we saw as much as 20rwhp and 25-30(!)ft/lbs of torque between 2500-3500rpm as a result of reducing the PE delay time.
Hope I was able to shed some light on this stuff for you guys...lemme know if you have any other questions.
Thanks
Mike