Telco
March 13th, 2011, 04:13 AM
Howdy folks. I'm about to replace the engine in my Silverado. The new engine is in the shop now. I'm pulling the worn out 5.3L out and putting in a 4.8L. If DD2000 is anything to go by the new engine at the crank will be making 386HP at 5500RPM, 412TQ at 4000RPM, and the torque band will be 335TQ or better pretty much from idle to redline. :grin: I'm really hoping DD2000 doesn't take the LS1's efficiency into account with this.
Anyway, after I get the new engine in I'll be installing a wideband and doing the proper tuning. Herein lies the problem. How well will the existing program handle the new engine between the initial install and tuning? The engine will need to be broken in, then driven to an exhaust shop to have a new system installed. I'm figuring I should be good to go if I just adjust the cylinder volume to be accurate, then back timing off about 5 degrees across the board. Anything else I need to be worried about? Thanks.
Anyway, after I get the new engine in I'll be installing a wideband and doing the proper tuning. Herein lies the problem. How well will the existing program handle the new engine between the initial install and tuning? The engine will need to be broken in, then driven to an exhaust shop to have a new system installed. I'm figuring I should be good to go if I just adjust the cylinder volume to be accurate, then back timing off about 5 degrees across the board. Anything else I need to be worried about? Thanks.