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Gunson's "Colourtune" is the coolest thing ever
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martx-5
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Re: Gunson's "Colourtune" is the coolest thing eve
I helped a friend install one on his TR6 that he put a supercharger on. The procedure is pretty straight forward. The biggest problem is welding in the O2 "bung" in the exhaust manifold. You could put it just about anywhere, but you have to consider how many cylinders it will read by it's placement. Ideally, you want it to read all four or six, depending on the number of cylinders. That usually means pretty far downstream, especially if you have a header. In that case you need a heated O2 sensor, as there won't be enough heat to make a one wire work. Also, the actual location must be so that you can easily access the sensor if it needs replacment and that it doesn't interfere with anything else like the frame or something. You'll have to drill the manifold and weld on the bung...which means you'll most likely have to remove it.
Once the bung is in, a little never-seize on the threads of the sensor, and screw it in. The four wires consist of two for the heater, one ground, and a signal to the gauge. You want all of that to go on with the ignition circuit.
I've always used Westach Air Fuel Ratio Gauges, as they are analog and have a buffer in them which seems to give much more useful readings then those LED light display gauges.
I've thought about getting real tricky with the TR3, and install two O2 sensors...one for each carb. Then have a switch to toggle between each one to read the AFR of each carb. /bcforum/images/%%GRAEMLIN_URL%%/smile.gif
If you use just one O2 sensor, total cost should run somewhere between $100-$150. $30-$40 for the sensor, $5-$8 for the bung, and about $50-$60 for an analog gauge. The LED gauges are cheaper. The rest for incidentals, etc.
tdskip said:
I helped a friend install one on his TR6 that he put a supercharger on. The procedure is pretty straight forward. The biggest problem is welding in the O2 "bung" in the exhaust manifold. You could put it just about anywhere, but you have to consider how many cylinders it will read by it's placement. Ideally, you want it to read all four or six, depending on the number of cylinders. That usually means pretty far downstream, especially if you have a header. In that case you need a heated O2 sensor, as there won't be enough heat to make a one wire work. Also, the actual location must be so that you can easily access the sensor if it needs replacment and that it doesn't interfere with anything else like the frame or something. You'll have to drill the manifold and weld on the bung...which means you'll most likely have to remove it.
Once the bung is in, a little never-seize on the threads of the sensor, and screw it in. The four wires consist of two for the heater, one ground, and a signal to the gauge. You want all of that to go on with the ignition circuit.
I've always used Westach Air Fuel Ratio Gauges, as they are analog and have a buffer in them which seems to give much more useful readings then those LED light display gauges.
I've thought about getting real tricky with the TR3, and install two O2 sensors...one for each carb. Then have a switch to toggle between each one to read the AFR of each carb. /bcforum/images/%%GRAEMLIN_URL%%/smile.gif
If you use just one O2 sensor, total cost should run somewhere between $100-$150. $30-$40 for the sensor, $5-$8 for the bung, and about $50-$60 for an analog gauge. The LED gauges are cheaper. The rest for incidentals, etc.
R
RonMacPherson
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Re: Gunson's "Colourtune" is the coolest thing eve
Art, one difference with the last sentence. Toyota or Nissan use a different acting/reading 02 sensor on the last couple of years on several engine lines.
Art, one difference with the last sentence. Toyota or Nissan use a different acting/reading 02 sensor on the last couple of years on several engine lines.
davidk
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Re: Gunson's "Colourtune" is the coolest thing eve
This is where I mounted the O2 sensor for my TBI injection system. I put it at this location on the manifold because there is a hole there in the divider in the manifold. This way the sensor can read both halves of the engine. It seems to work well in this location.
This is where I mounted the O2 sensor for my TBI injection system. I put it at this location on the manifold because there is a hole there in the divider in the manifold. This way the sensor can read both halves of the engine. It seems to work well in this location.
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Re: Gunson's "Colourtune" is the coolest thing eve
If you're thinking about buying an oxygen sensor and using it for engine tuning, this article will turn you on to another use for it - mapping your ignition advance curve!
https://www.britishv8.org/Articles/Ignition-Tuning-201.htm
martx-5 said:
If you're thinking about buying an oxygen sensor and using it for engine tuning, this article will turn you on to another use for it - mapping your ignition advance curve!
https://www.britishv8.org/Articles/Ignition-Tuning-201.htm
Re: Gunson's "Colourtune" is the coolest thing eve
Indeed it is! Jeff is on-the-hook to write a regular technical column for The British V8 Newsletter... so if you've got ideas for ignition topics you'd like him to write about let us know.
Here's Jeff's previous column - an introductory explanation of how mechanical advance is changed within a distributor: https://www.britishv8.org/Articles/Mechanical-Ign-Advance.htm
Incidentally (and off-topic), here's a link to the "Triumph Section" of our website's photo gallery too: https://www.britishv8.org/Photos-Triumph-Conversions.htm
Indeed it is! Jeff is on-the-hook to write a regular technical column for The British V8 Newsletter... so if you've got ideas for ignition topics you'd like him to write about let us know.
Here's Jeff's previous column - an introductory explanation of how mechanical advance is changed within a distributor: https://www.britishv8.org/Articles/Mechanical-Ign-Advance.htm
Incidentally (and off-topic), here's a link to the "Triumph Section" of our website's photo gallery too: https://www.britishv8.org/Photos-Triumph-Conversions.htm