In need of some guidance on my 08 Chevy 5.3 tuning!!!!!

[Cbrown.83]

I just rebuilt the top end of my motor and the only thing I have done with the ECM is downloaded the information from the truck to VCM editor and changed the DOD to disable. I got it started up and idling now but when using the Scanner I noticed that the timing is jumping around from 16 to 20. I was wanting to know what would be a good tune for it.

Here is what I have done to the motor:
NON DOD cam = TSP 212/218, 0.600/0.600; 112LSA stage 2 truck cam
LS2 timing chain and damper
LS2 lifter tray
LS7 lifters
Single beehive valves .625 max
GM high performance oil pump
Installed new valve seals and lapped valves (799 heads)
7.4 chromoly push rods
GM L92 valley cover no PCV
New gaskets

[5FDP]

Timing will never be steady. It's going to move around some and it's normal. How much you allow the timing to swing comes down to settings in the spark correction tables.

Nobody can tell you what a good tune would be because the engine is going to tell you what is wrong or needs changing.

Ideally a wideband oxygen would be used to tune the fueling side of this. Fuel trim tuning can be done as well but only for closed loop fuel control. Any full throttle tuning can't be done with fuel trims.

Just from the log it shows that the longer the engine runs the more fuel it's pulling out with the negative trims. It's going to want a little work from the MAF and VVE airflow tables. You'll have some reading to do on how to tackle some of this. There is power to be found with other changes to wide open throttle fueling and timing changes with that new larger camshaft. Could probably pick up 20-30hp with that new camshaft.

[Cbrown.83]

Thank you for your help. I will catch up on my reading.