Use the Wideband O2 gage as a reference. When you make a carb or any other engine change, note the effect on the wideband output.
Innovate's products react quickly which is good, but also means it is helpful to log or video with rpm.
For wide open throttle, make changes to the carb for as flat an AFR line as possible. For launch and shift recovery, use the data as reference for any changes you make.
AFR relationships to load for best efficiency.
Wideband
Two posts with examples of using AFR during Dyno Tuning.
post #49 has three pulls showing how timing changes can effect the Wideband's interpretation. Even though its false AFR change, its still important to record and note since whatever it is will be our baseline for carb changes we make later.
post #50 shows a carb with a good primary calibration but incorrect secondary calibration.
Need Opinions. Have nothing to compare to.
If you can do some carb tuning on the dyno in top gear, that can be used to get the AFR flat at max load using 3rd or 4th gear through the horsepower peak. Then jet for best ET or mph at the strip.
Carb Tuning.
Basic Principles:
Books. Urich & Fisher,
Holley Carburetors and Manifolds. HP Books (find an older used copy), or David Vizard's current book has more advanced stuff but just be cautious about following his advice which is often project specific or missing some details. Don't ask how I know this.
On-line.
Carburetion Fundamentals & Facts (Session 273) from the Master Technician's Service Conference
Holley type Carb adjustments, modifications, and tuning for Racing:
racingfuelsystems - Stickies
First step will be to measure each restriction present, along with the thottle positions, pump cam and shooters.
Here's an XLS example sheet.
Holley Carb Sheet
Nice example posted by a hot rodder here:
Mild Ford 289 Tune | '37 Pickup Cruiser
