CB Performance Air/Fuel meter?, Who's used it, and with what kind of results?? Options

[jaybird840]

Hey Gang,
I've been eyeballing the CB Performance Air/Fuel meter to assist in dialing my carbs in. My eye is not well-trained enough to do it by looking at the spark plugs, so I though an A/F gauge might do the trick. It's about $130 for a three-wire heated O2 sensor, gauge, and exhaust bung. Anybody used it? Any others I should be looking at? I'd consider the Innovate unit, but it's over $300, and until I megasquirt, I don't think logging data will be that useful for my street only car. Also, as the car has dual carbs, would it be a good idea to weld in two bungs(or even four) so that I could switch between cylinder banks, or even individual cylinders? My thought is to mount the gauge in my existing clock (non-working) hole in the console. Any advice related to A/F meters and carbs is welcomed... Thanks!!

--Jaybird

[Brett W]

There is a reason all the wideband units are kinda pricey. They work. Unlike the narrowband pretty light shows. Those are useless. If you tune a bunch of engines get a wideband unit, otherwise make a dyno run and use theirs. It will do the job you need.

Your dealing with carbs, there ain't a whole lot to them. You can't change every operating zone like you can with EFI. You jet the thing for WOT and idle. Just do a plug cut for WOT jetting and go with 57-65 idle jets. Weather will play a role in what you jet for on the idle size.