New turbo...do I need to tweak XFI?

[MSDGN]

I've been running a 70GTQ for awhile now and have the tune where I want it...I'm replacing the turbo with a new Precision 71HPQ...do I need to tweak the tune to add more fuel...or will XFI be able to compensate for it OK?...the 71 should flow more air...

 

[HighPSI]

If the tune was close before the swap, you'll be fine to make a pass with the new turbo then tweak it from there.

 

[bobc455]

The time you'd really need to make a change is if you flow more air without making more pressure (i.e. cam change, head porting, etc.). If your intake tract has not been modified, then all you probably need to do is tweak the VE vales and timing values at the new higher pressure.

-BC