Could lack of VVT tuning be my issue?

[JasonHD]

I've felt my truck has had issues since the build. 2015 GMC 2500HD. Heads, Comp 222/236 VVT cam (grind 275PHR14), longtubes & ORY, 2.9 whipple (with low vacuum bypass), and circle d 3200 converter.

I get to zero vacuum at what I feel is low pedal % (with ETC Position within 2-4% of Pedal). Basically trying to come into boost at 42-44% pedal, and wondering if that's normal?

From what I can find, some companies supply the VVT tables with cam purchase. Looking over my tune after the build, I still have the stock tables just with the areas in boost zero'd out. Is that really the proper way to do that when changing to an aftermarket VVT cam?

Tune and stock tune attached. Any help or insight would be appreciated.


2500HD-8psi.hpt 2500HD-Stock.hpt

[JasonHD]

Anyone? Any input on leaving the tables stock and the upper regions being zero'd out being an acceptable way for an aftermarket vvt cam to be tuned?

[schpenxel]

Log?