Originally Posted by
Jay2one
Just looking to see if he was still doing tunes. My friend has been playing around with HP tuners on my 2002 2500 Avalanche. (He's not a seasoned tuner) Just playing with some timing and some torque management. I'm not familiar with that stuff. I run Holley EFI on my boat and Mustang custom builds which doesn't have the factory de-tuning features. And usually on a dyno. I really don't know safe parameters on my 8.1 (AFR's, mid cruise lean AFR target, Timing graph and TQ management). It's pretty sad when I have a 496 cu/in engine and can't turn the tires over or has to downshift for an incline. (3.73's) Just looking for more towing power (boat 11,000 lbs) and some pep.