As far as being able to roll back to a different ECM strategy, I really think that only matters if you keep your truck stock. I could be wrong but if you are running a "custom" tune, the tuner will no doubt modify (what they have found to be) the best strategy for making power so rolling back isnt that important IMO. Hope this helps.
The earlier strategies provide a little more power and better MPG. From what Bill (PHP) told me, the early strategies use the EBP sensor as an input to the PCM to better control/operate the motor functions.
Yes, rolling back to a earlier strategy will require different strategy custom tunes on the SCT. The VXAP1,VXAP2, VXBC7, VXBC9, VXCF7, and VXCF9 get rolled back and required you to have your custom tunes re-written to match.
For me, it's worth a shot to rollback for $75 if I'm gonna gain a little more power and possibly gain 1-2 mpg.
To each their own, going with PHP just gives you more options, but you pay for those options. PHP FICM tuner is $100 more, then add in $75 if you choose to rollback the PCM. The Gyphon can also be used as a monitor and code reader.
LOL!! I bet we are confusing the heck out of the OP!! LOL! Decisions..... Decisions!!! He He!
2004 F350 CC DRW King Ranch
X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB