"ABA" is a term on this forum used to measure any MPG changes between two variables.
For example: to test to see if there is any mpg improvement between stock vs cobb stage 1
A - do one run with stock tune - measure the mpg
B - do one run with Cobb Stage 1 tune - measure the mpg
A - do one run with stuck tune - measure the mpg
Hopefully, you should be able to see mpg differences between Stock vs Cobb stage 1....thus solidifying that Cobb Stage 1 can increase mpg.
The reason why we do ABA is to further eliminate any outside variables that can affect mpg (weather, traffic, driver's right foot), so that the goal is to be able to say "X mod definitely increased my mpg by Y"
http://ecomodder.com/forum/showthrea...ery-11445.html
Very similar to dyno tuning:
A - Stock with I
B - Stock with S
C - Stock with S#
D - Stage 1 W/93 & I
E - Stage 1 w/93 & S
F - Stage 1 w/93 & S#
G - Custom Stage 1 for DAVCS w/93 I
H - Custom Stage 1 for DAVCS w/93 S
I - Custom Stage 1 for DAVCS w/93 S#