Which O2 sensor/gauges setups are you guys using?

Innovate dual channel.
I haven't used it on the boat yet, but I installed it on my coronet to tune the 440. It worked great.
400 bucks at summit.

I am using F.A.S.T system

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When i bought the Daytona 8 channel 02 system for dyno i also bought their 2 channel handheld so all software and sensors would be same tuning on dyno, in car or in a boat.

Here is my chart right from my ecm (as target AFR) KPA on the left and rpm across the bottom. Anything over 105kpa and I'm making boost. This is on a twin turbo GM ls but you can atleast see where I'm sitting before boost comes on.

I usally like to have idle around 13.5-14 this motor loved 13.5. at 14 it would want to "hunt"



Should add spent many late nights running it in each area shutting it off and check plugs. I just pulled the heads off (to add studs) and no sign of detonation with these afr. I was a little worried about my cruise (3000rpm) afr but once I got knock sensor dialed in I still had plenty of timing left before it started binging.

NA, I usually shoot for 12.7 or so on the dyno so it drops to about 12.5 in the boat. I usually normally run mid 12.s in the boat on NA's that I've built. In the 11's you're most likely killing power and making a lot of exhaust temp. I run high 11's in my blower engines and they're 965hp.

I'm running the innovative wideband. I put a bung in each pipe and was going to go with the dual band unit, but if my O2 sensor survives I'm going to move to closed loop fuel injection next season using the other bung, otherwise the dual band is the way to go.

So, is 11.2 at wot extremely rich, kinda rich, or am I just losing a smidge of power up top? 502 carbed.

On NA IMO extremely rich.

NA. Thanks.