Why are my corrections never what they should be?

It should be so simple... I'm getting 10.5 on the wideband , so I take actual and divide it by commanded to get the correction factor. Lets say we need to multiply by .70 to bring it in, but a correction like that might only get me to 11.5 from 10.5 when it as suppose to get me to 14.2 . I'm working on a blown 4.6 ford 2v SCT advantage 3 tune with 80# injectors.

Are you in open loop or closed loop? Maybe there's a vacuum leak somewhere or your getting bad data from the o2's

I'm sure I dropped the ball and let it do close loop corrections. Not sure how much they will adjust though and no real short term trim adjustments were seen . I have seen a little on one bank, might need a set of plugs again. I do have adaptive learning off. both O2,s are new. Aside from injectors with no data I worry about the headers. They just tetherd together and might leak a little skewing the reading. Seems to me though if that caused the car to see lean the wideband should see leaner readings as well and the car is very rich. A vacuum leak might be possible, but shouldn't that get the car leaner? I bought a dual wide band today and will put them where the primary O2 's are now after shutting them off in the tune and see what happens. Now I only have a who knows how old wideband after the X pipe.

most widebands max out at 10.5 so it could be very much richer, keep leaning it, and dont be scared to make large changes