AFR gauge installation
- Thread starter leejewell
- Start date
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nvrenuf
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Does your a/c work? If not, are you going to fix it?
75gmck25
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Is it a wideband gauge, and does it have a heated sensor?
No heated sensor - usually needs to be within a few inches of the collector, or in the collector fitting. This because it needs the exhaust heat to read properly.
Heated sensor - anywhere between the collector and the muffler or crossover. Exact location is more flexible, but you don’t want leaks in the pipes in front of it to screw up the reading.
All O2 sensors - bung should be pointed straight up or within about 30-45 degrees of straight up. This ensures residual moisture from the cooling exhaust pipe does not collect on and contaminate the sensor.
Make sure everything in the wideband gauge wiring is grounded to a single point, which is then grounded to the engine and body. The gauge works by reading very small voltage variations at the sensor, so you do not want any difference in ground potential to throw it off.
No heated sensor - usually needs to be within a few inches of the collector, or in the collector fitting. This because it needs the exhaust heat to read properly.
Heated sensor - anywhere between the collector and the muffler or crossover. Exact location is more flexible, but you don’t want leaks in the pipes in front of it to screw up the reading.
All O2 sensors - bung should be pointed straight up or within about 30-45 degrees of straight up. This ensures residual moisture from the cooling exhaust pipe does not collect on and contaminate the sensor.
Make sure everything in the wideband gauge wiring is grounded to a single point, which is then grounded to the engine and body. The gauge works by reading very small voltage variations at the sensor, so you do not want any difference in ground potential to throw it off.
nvrenuf
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Ok. If you weren’t using the a/c vent I’d say install the gauge in that hole using some rough textured plastic (Lowe’s and HD carry it).
You could do the same with the radio hole.
The only other alternative is to put it on the column or hanging along the bottom of the dash.
nvrenuf
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CoggedBelt75
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Here's where I have my Innovate A/F gauge
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Old picture but this is where I mounted the gauge in my 76.
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Race truck? I see a roll bar...
nvrenuf
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No, this one is just a wheeler. The cage is because it’s a full top but some of its parts are from my last truck that was a wheeler + deep pit racer.
SquareRoot
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Buy EFI and/or Dakota Digital. Then you can see it on your gauge panel or phone.
Craig Nedrow
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I did the same install, go here start on post 108: https://www.gmsquarebody.com/threads/1973-k20-350-to-454-swap.29840/page-8
An amazing tool to tweak your carb, which I run, (Holly 4150.)
ChuckN
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I don’t have a functioning radio, so I took it out, made a plastic plate that mounts in its place since the dash bezel was already hacked up.
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