ok so i was out messing around in my truck and a realized that from a dead stop with my ac off i can only stall to about 1000, anything over that i will just do a stand still. BUT if i have my ac on i can stall to about 1500 and have a good launch. I just cant figure this out can anyone help me out its driving me crazy.

 

What size engine?

 

5.3 with intake, cat-back, shortys, tune and 3.23s

 

Just guessing, but when you turn on your ac doesn't it pull timing, thus letting you rev more to achieve the same torque?

 

Sounds like torque management.

 

so does this mean it about the same thing either way?

 

I am fixing to put 3.73s and posi so that should fix it right?

 

+1, I'm no tuning guru, but I'm guessing brake torque management...

 

By saying stand still, do you mean a burn out?

 

ya burn out