Originally Posted by BlUEMDsrt6
Ok, so I'm trying to decide which gauges are most beneficial and need some help. Since our cars are v6's and have two headers would it be a good idea to run two a/f or is that an overkill? I am interested in knowing if running one a/f is close enough estimate on our cars overall a/f ratio without having to run a 2nd? Will tuning with two a/f gauges really that make that much more of a difference?
The short answer is that it depends on the state of your engine.
If you are planning on modifying the intake/exhaust ports, exhaust headers, with individual dual exhausts, AND you are tuning the ECU, then one wideband per cylinder bank would help.
If you are just slapping bolt-ons on then my personal opinion is that running dual widebands is redundant!
Engines that run trumpet-style intakes and individual throttle bodies are often tuned with individual EGT and wideband AFRs on each cylinder!