and they also sell the plug for it.
O2 Sensor Thread Pitch
Thread Starter
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Joined: Dec 2004
Posts: 94
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From: Barrie Ontario
O2 Sensor Thread Pitch
I am getting my headers coated soon and I was thinking of adding an O2 weld bung for a A/F gage.
I am not ready to buy the sensor and gage at this time so I was thinking of making my own weld bung and welding it in before coating. I know that the thread is 18mm but I don't know the thread pitch.
Does anyone?
Thanks.
Mark.
I am not ready to buy the sensor and gage at this time so I was thinking of making my own weld bung and welding it in before coating. I know that the thread is 18mm but I don't know the thread pitch.
Does anyone?
Thanks.
Mark.
Burning Brakes
Joined: Sep 2002
Posts: 1,179
Likes: 3
From: SF East Bay CA
Sorry I don't know the pitch, but most all 02 sensors are the same. You can get an 02 bung with plug from Summit or most any parts store for around $20 US. This way you can plug the bung until you get the sensor installed.
Race Director
Joined: Sep 1999
Posts: 11,361
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From: Plano TX
Easy solution: Go to most any autoparts store to the "help" section. Look around and you should find what they call "spark plug anti foulers". These are just spacers. One end screws into the plug hole in the head, other end you put your spark plug. They will have the smaller version as well as the large spark plug version (18mm). Get the larger one as it is the same thread as an O2 sensor. Cut the "anti fouler" in half and weld it to your header.
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Joined: Dec 2004
Posts: 94
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From: Barrie Ontario
Originally Posted by flood
Going wideband?
Regular 02 sensors suck and it wouldn't be very much use to you.
Regular 02 sensors suck and it wouldn't be very much use to you.
And why do "Regular O2 sensors suck"?
I was planing as using it as a tuning aid.
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Race Director
Joined: Dec 2000
Posts: 10,896
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From: CO
Originally Posted by FLEXUSMARK
What do you mean by "Going wideband"?
And why do "Regular O2 sensors suck"?
I was planing as using it as a tuning aid.
And why do "Regular O2 sensors suck"?
I was planing as using it as a tuning aid.
narrow bands only read up to 1 volt and a wide band reads up to 5 volts. wide bands are much more accurate when tuning a car
Narrowband O2 sensor outputs 0-1 Volt. The higher the voltage, the richer the air/fuel ratio. The problem with a narrowband is that it has an "accuracy window" which means it is accurate ONLY from 14.3:1 - 15.3:1.
A good wideband sensor can read from 10:1-20:1.
Le Mans Master
Joined: Oct 2001
Posts: 5,145
Likes: 125
From: The Motor City
I just checked a bung that I have in the garage and the thread pitch is 1.5.
For tuning, you need a wideband. Check out either the Dynojet Commander, the Innovative Motorsports LM-1, or the AEM. As was said above, narrowband sensors are only really accurate at 14.7:1. The wideband will tell you how rich or how lean your mixture really is.
For tuning, you need a wideband. Check out either the Dynojet Commander, the Innovative Motorsports LM-1, or the AEM. As was said above, narrowband sensors are only really accurate at 14.7:1. The wideband will tell you how rich or how lean your mixture really is.
Race Director
Joined: Mar 2001
Posts: 11,322
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From: Living in the Hartland
Wide bands are great for EFI but for a carb are overkill, change the air temp and your accuracy is shot with a carb since it can't adj. Why spend big $ for a wide band when you can get all you need from a heated O2 sensor? 
Burning Brakes
Joined: Aug 2002
Posts: 1,146
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From: Scottsboro Alabama
Originally Posted by Fevre
Wide bands are great for EFI but for a carb are overkill, change the air temp and your accuracy is shot with a carb since it can't adj. Why spend big $ for a wide band when you can get all you need from a heated O2 sensor?
Race Director
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From: Living in the Hartland
Originally Posted by Older Than Dirt
Glad to hear that! That's what I thought too, so I bought the heated sensor but haven't installed it yet.
