Tune Sanity Check

[Batmanntexas]

Hey all, I'll post this in the tuning section as well....

OK, I helped a buddy out and built him an LS3-based 416 (24X Reluctor) with a Novi 2200, 95-lb/hr injectors, ported 821s, 227/243/.620/.629 @114 cam, 2" LT headers, NW 102mm, 10% OD balancer. This is in a 2002 Corvette, M6 car.
Fuel system is a custom built return style using twin 525lph pumps @58psi.

Anyways, I'm trying to get the tune straightened out and I need a little advice/assistance.

The car has been tuned before, as it came to me with a N/A 416 (spun main bearing). So, first thing I did to the tune was apply the appropriate injector data, and update the MAP sensor (3-Bar) information. It is still currently utilizing the 1-Bar SD VE table.

The car will start right up, idle for maybe 2 seconds and then die....repeatedly. Can't even operate the throttle pedal to keep it going. The WB reads 20.

Here's the strange thing: on one of these attempts, the intake pipe popped off the throttle body. The car proceeded to idle and respond to the throttle pedal (not great, but it did respond). WB read 10, and my eyes and nose believed it.

The intercooler is equipped with a 50mm Bypass Valve that closes ~2 inHg, so in my mind, it should be opened, and bypassing air, at idle.

My assumption is that the VE table and/or MAF table are significantly off and causing my initial issues. Tune is attached.

Thoughts?

Should I just add 10-15% across the board to both VE and MAF tables?