I tried doing a burnout the other day and the truck just won't rev up while doing so. It spins the tires, but not fast. I have the advance trac off and everything

 

Probably need to unplug the ABS fuse. I've heard that's the best way to truly deactivate TCS. But I've never tried it.

 

Brake stall it. Apply slight pressure to the brake while pressing the gas pedal. Due to the way the brakes are pressure biased the front brakes engage first then with more pressure on the pedal the rears engage.

If done correctly you should be able to have the truck stay in place and smoke the hell out if your rear tires

 

I was "test driving" a scab 2.7L on the weekend and was able to lay down two nice strips of rubber. The 2.7L has pretty good acceleration.