Yes higher is leaner, as the number expresses the parts of air to the one fuel part. Bigger number means more air and thus a leaner mixture. 14.7 is stochiometric: i.e. a perfect mixture, but not viable for engines.... also people talking about AFRs. is a higher no. lean or rich id assume lean
@Benji: That video is simply wicked! Thanks for the view over your shoulder. That certainly proves a picture is worth a thousand words. Hope you don't mind I posted it to the German forum too. :bowdown1:
@Dave: Take a look at COBB Map 1 or COBB Map 2?
The COBB site answers your question too. Haven't I seen you post on the NAGTROC forum?