At a variety of low loads(35-80-ish hp), at a variety of rpm's(2200-3200), looking at A/F ratios being displayed from the flow turbines and a Daytona Sensors wide band showed that none of the 5 had what either of us considered "acceptable" part throttle operation...... with the best of them being in the low-12's, and some in the 11.0-11.2 range.
They worked perfectly well to use on a "race car", but wouldn't be the hot ticket on the street(in their current configuration).
I can't believe I'm going to say this........but........this is an example of a good argument for EFI.
Why do you say that? Just because nobody had time to fix a part throttle lean issue? An EFI system with a lean part throttle concern is still going to need calibration also. 5 minutes booting up a laptop or 5 minutes changing a bleed. I had someone drive over their laptop on a test day. Guess how much data we got that day?
The part-throttle was rich on all of them, not lean, and really out of normal range in at least one case.
It was a loooong day. Met Dwayne a the dyno at 8:00 AM, last pull was close to 7:30 PM. Then time to break it all down, etc.
