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Hi everyone, just curious if anyone has added wideband oxygen sensors to their C3 (mine is a 1979), I am doing it for tuning purposes. Curious where you added them? I am running headers with straight pipes back to mufflers, no catalytic converters. I've read a lot of articles that say put them after header pipes merge, others say right after the header connection to the pipes?
Thoughts???
Thanks
Steve
Don't weld the bung on a low surface where the sensor could get condensation on it. Put it in a convienient place after the collector in the side of a pipe if you have long tubes.
I just looked and I have about 4 to 5" after exhaust tubes merge before the exhaust pipe connection, looks like there is plenty of room there at the terminal portion of the collector. Or is there any advantage to going after the collector connection to the exhaust?
Here is what I did. Adding the gauge was a real game changer when it comes to tuning. I had a great time tuning both a Holley 4160 and a 78 Quadrajet. I really like that model of Quad because of the APT screw for tuning your part throttle efficiency.
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
I have ramshorns and an AFR gauge but wanted to chime in. mines mounted in the 10 0clock position so that it stays out of any exhaust byproduct water.
I used mine in tuning my edebrock, then on my quadrajets. Greatest piece of equipement ever. I tuned idle, cruise, and WOT with it and I get 15.5 mpg on the highway at 80 and 4000 rpm. That was measured over a 2 hour drive, each way, to my cousins house in RI.
The bigger question I thought this was going to be about was where to mount the gauge. I mounted mine on my A pillar without any modifications. You can run the wire up beside the pad and into a pod without anything showing and using the existing screws. You ust need heat to make the pod grip. When I went to a triple pod I did the same thing but used heat on the end to form it to the upper windshield moulding.
Back to the original question, One of our members had a reversion problem on his sensors so he mounted it in a down tube with great results.
drivers view single pod from the side. Only one I had
Last edited by Rescue Rogers; Aug 23, 2019 at 03:36 PM.
just had to heat and mold them to the pillar, then dyed them to match interior color.i placed them so i could use the existing screw to hold along with the clamping force of wrapping the to fit tight
Last edited by Rescue Rogers; Oct 24, 2019 at 07:18 AM.
Looks pretty slick with that pod set up. I installed the same AEM A/F gauge, but I also see you installed a vacuum gauge as well. I was considering the same for tuning; were you able to figure out at what amount of vacuum the primary rods begin to lift out of the jets?
Was that Summit gauge pretty accurate?
I see 1 summit gauge going for $15, but I'm assuming it's not accurate at all. DId you get the SUM-G2885-6 for $65?
I like the pods, but I also like the look of the stock interior....to each their own.
I figure once I get the carb tuned, I will likely remove the A/F gauge so it just looks stock. I just used this cheap gauge bracket and put it next to the vacuum override switches. You can use one of the screws going from the big steel bracket to the surrounding paneling. Not as ergonomic for viewing, but more out of the way looks wise.
Just thought i would throw that out there for the OP, depending on what they want for their car
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Originally Posted by mongoose87
Looks pretty slick with that pod set up. I installed the same AEM A/F gauge, but I also see you installed a vacuum gauge as well. I was considering the same for tuning; were you able to figure out at what amount of vacuum the primary rods begin to lift out of the jets?
Was that Summit gauge pretty accurate?
I see 1 summit gauge going for $15, but I'm assuming it's not accurate at all. DId you get the SUM-G2885-6 for $65?
I like the pods, but I also like the look of the stock interior....to each their own.
I figure once I get the carb tuned, I will likely remove the A/F gauge so it just looks stock. I just used this cheap gauge bracket and put it next to the vacuum override switches. You can use one of the screws going from the big steel bracket to the surrounding paneling. Not as ergonomic for viewing, but more out of the way looks wise.
Just thought i would throw that out there for the OP, depending on what they want for their car
yes its the electric vacuum gauge, https://www.summitracing.com/parts/s...85-6/overview/
and no I didtn go that far intot he needlsa nd seats. By the time I got this installed I had the carb tuned in very nicley with the AEM A/Fr guage
Last edited by Rescue Rogers; Oct 24, 2019 at 09:02 PM.
I will voice my preference for an analog rather than digital AFR readout, as mentally, it is easier to average the needle. If you are going with some sort of data logging, well that is a different animal. I am wondering, Rescue Rogers, if that AEM gauge does both? It's been a while since I bought mine
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Originally Posted by ignatz
I will voice my preference for an analog rather than digital AFR readout, as mentally, it is easier to average the needle. If you are going with some sort of data logging, well that is a different animal. I am wondering, Rescue Rogers, if that AEM gauge does both? It's been a while since I bought mine
It does to some extent. digital reading in the middle and a light that runs around the outside that acts like a needle pointing to an analog number written around the face. But I find myself just reading the number as Im driving. I too would prefer a gauge with a needle sweep to match the rest of the gauges and get a quicker reading, but its not as important as oil pressure or water temp. I just glance at those to make sure they are pointing in the right direction without having to concentrate on them
Also make sure there are no exhaust leaks near the O2 sensor.
There are some models that do logging as well so it's not as critical to see what the reading is all the time. Some will let you use your cell phone as a display.
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Adding wide band O2 sensors
