 A/F gauge Ox sensor bung location? |
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| tmessenger |
 Feb 4 2019, 08:53 PM
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#1
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Member  Group: Members Posts: 70 Joined: 6-December 18 From: Iowa Member No.: 22,707 Region Association: Upper MidWest  |
I ordered an air/fuel gauge so I properly tune my carburetors and now need to weld in the bung for the Ox sensor.
My car has a Triad muffler so I'm thinking the transfer pipe between the upper and lower mufflers? I really want to measure both banks so if one of the carbs goes lean I have some advanced warning. I've read it's better to put the sensor before the muffler so don't know. The only other option is to place the sensor in the header right where it enters the muffler but then I'm only reading one side. Tim  |
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| ablesnead |
Feb 4 2019, 09:25 PM
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#2
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Member Group: Members Posts: 157 Joined: 16-September 13 From: United States Member No.: 16,395 Region Association: None |
QUOTE(tmessenger @ Feb 4 2019, 09:53 PM)  I ordered an air/fuel gauge so I properly tune my carburetors and now need to weld in the bung for the Ox sensor. My car has a Triad muffler so I'm thinking the transfer pipe between the upper and lower mufflers? I really want to measure both banks so if one of the carbs goes lean I have some advanced warning. I've read it's better to put the sensor before the muffler so don't know. The only other option is to place the sensor in the header right where it enters the muffler but then I'm only reading one side. Tim This is probably to late , but you would be better served to have a dual readout gauge , with dual bungs , one at each exhaust merge , that way you can tune each carb , for the desired mixture , instead of the combined flow that could mask a single carbs less than ideal adjustment... |
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| VaccaRabite |
Feb 5 2019, 09:04 AM
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#3
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En Garde! Group: Admin Posts: 13,629 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region 
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(IMG:http://www.914world.com/bbs2/uploads_offsite/c2.staticflickr.com-1435-1549379041.1.jpg)
I put mine on the up tube leading to the mufflers. Works great. ZAch |
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| tmessenger |
Feb 5 2019, 02:03 PM
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#4
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Member Group: Members Posts: 70 Joined: 6-December 18 From: Iowa Member No.: 22,707 Region Association: Upper MidWest |
Thanks, Zach
The gauges I bought also monitors the sensor temperature so I'll give it a try in that location. QUOTE(VaccaRabite @ Feb 5 2019, 09:04 AM) (IMG:http://www.914world.com/bbs2/uploads_offsite/c2.staticflickr.com-1435-1549379041.1.jpg) I put mine on the up tube leading to the mufflers. Works great. ZAch |
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| BeatNavy |
Feb 5 2019, 02:16 PM
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#5
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Certified Professional Scapegoat Group: Members Posts: 2,944 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
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That's where I had it when I had a Triad.
Be smarter than me when you weld in the bung. Conventional wisdom says the sensor should angle down to, as I understand it, prevent moisture build up on the end of the sensor. That's what I intended to do, but the Triad's up/down orientation is a little deceptive. I ended up welding it opposite of what I intended so the sensor was pointing somewhat up. (IMG:style_emoticons/default/headbang.gif) It didn't seem to negatively impact the readings, but that was (another) reason to feel stupid that day. Maybe I am just spatially challenged (IMG:style_emoticons/default/blink.gif) |
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| Olympic 914 |
Feb 5 2019, 02:39 PM
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#6
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Group: Members Posts: 1,710 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States
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I had Dave add the sensor bung when he built my Triad and that's also where he put it.
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| rjames |
Feb 5 2019, 04:02 PM
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#7
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I'm made of metal Group: Members Posts: 4,162 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest
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Yup, before the muffler- angle it up per previous post.
I don't have a triad, but here's a shot of mine installed right before the collector pipe enters the muffler.  What brand AFR did you go with? I went with the PLX Bluetooth one so I could use my phone for monitoring readings rather than installing a gauge (wanted to keep the stock dash look).  |
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| tmessenger |
Feb 5 2019, 07:07 PM
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#8
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Member Group: Members Posts: 70 Joined: 6-December 18 From: Iowa Member No.: 22,707 Region Association: Upper MidWest |
This is the one I ended up ordering: https://www.14point7.com/products/sigma-lam...ntroller-free-2
Tim |
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