I did back to back quick fuel vs. FAST TBI self learning years ago...It actually took me a while to get the FAST system to the same ET as the carb. Got to pick the right WOT AFR and get the squirter shot right.
When I was done, they were within .03 of each other.
.03 does not seem like a lot when you consider the extra dollars and parts required for EFI.
