I have a DOHC ZC with full I/H/E setup. I have been told that this often results in a lean mix and that something like the B&M CommandFlo is needed to up the fuel mixture a tad. What is a cheap way of determining A/F mixture? I am not going to tune this thing to death. I just want to make sure it is getting enough fuel.

 

To do it right you need to use a wideband O2 sensor like the the PLX or AEM units. The narrowband O2 sensors only know stoich, rich, and lean which doesn't help a lot since it isn't exact enough to determine exactly how rich or lean it is running.

 

I would take it to a shop with a dyno. Alot of times they have "Dyno Days" in the spring and you get a deal on dyno time. They can tell you if you are running lean or not.