AFR Gauge Added

[Titan1969]

I installed an AFR gauge on my 340. I am dialing in timing, vacuum and AFR before eventual cam swap, so I have a before and after. Car does smell rich at idle and the picture confirms I need to lean out the Edelbrock AVS 625 a bit. I have not gone for a cruise or WOT yet.

I purchased this wideband for $90 and installed, very easy.
Sensor is just below the collector, on top side of pipe to avoid excessive moisture build up.

I do not drag race the car, I did not need recording , so chose a lower cost unit.

https://www.amazon.com/dp/B0CJHS2FWN?psc=1&ref=ppx_pop_dt_b_product_details

 

[540HemiCuda]

I'll offer a few points on the first time use of a wide band O2;

First, with most any cam in a performance engine, you will not be able to dial the idle mixture in with it. With any valve overlap, the reversions will make the readings basically worthless. I can provide details, but that is the long and short of it.

Second, things happen very fast when going through the RPM range. As such, trying to watch the O2 AND drive is near impossible. So, the ability to record is almost mandatory. As is RPM tracking with the ratio.

And the only way to fix your best WOT ratio is at the track. With consistent atmosphere, simply jet up until it slows down and back up to the best jetting. Then you can use the O2 to dial in the curve.

When trying to set the steady speed/cruise ratio, even a narrow band can get you there, so a basic wide band with no other features can too.

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