Attached are 3 pics.

First is the original values of TVUB in 551R vs 551M.  You'll see the values are different between the bins.

Second is the DEF of TVUB in 551R

Third is the Def of TVUB in 551M

You'll notice that the factors are quite different between the bins.   Also, KRKTE factor is different between the bins.  551R is .000167 vs .000111 in 551M.

Okay thanks Nyet for the clarification on KRKTE

Either I am completely stupid, or TVUB just isn't working (at least the same) in this binary.   Using the values from the injector data sheets just doesn't work like every other ME7 binary I've modified.

I never had any issues with TVUB (only one AFAIK) or KRKTE with the 551R bin when going to the EV14s and 4-bar PR (for reference; don't know what you are switching to.)  With FT21s and stock exhaust my KRKTE was 0.0613.   TVUB was 2.2280    1.4920   1.0520   0.7720   0.5080
Idle trims were -1% and partial was -4%.  FKKV=1s.  Cold start improved to avoid the brief bucking by increasing KFFWL_0_A / KFFWL_1_A 10%-12% in the -30* to +9.5* range.

Later when Iadded catless 3" DPs and 2.5" all the way back KRKTE needed to be something smaller, something like 0.056.  Didn't have to change TVUB.