08 GMC all-terrain
#21
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Join Date: Jan 2003
Location: Queens, NY
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#22
Launching!
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Join Date: Dec 2007
Location: Ky
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with torque managment you have no throttle responce, Thats the next thing to disable with a tune. an unbelievable difference in throttle responce and power...Shifts when you want it to and in a hurry. HP tuners does a real good job!
#29
On these engines it changes the phasing (timing) of the exhaust valves to improve torque and fuel efficiency. I have no idea what the measured differences are with and without the VVT active.