The folks on the old-German sports car forum I frequent use a gauge kit, including the wideband sensor and dash-mounted meter. There are no connections to the ECU, which doesn't use this info. anyway, and the data aids in making tuning decisions. There's no reason why the same data can't, or won't, help in tuning a carburetor setup...single, double, or more. Personally, I want to know what the actual A/F ratio is at idle, at WOT, under load, with a dirty air filter, with a K&N filter, in summer, in winter, etc. I'll spring for the couple hundred to know at a glance.
EDIT:
http://www.summitracing.com/parts/sum-g2997/overview/Now, since you've already started the testing, Deve, will you be trying different jet sizes to see the difference in the exhaust or in the fuel consumption?
