Cylinder Head Temp Sensor? Options

[Puebloswatcop]

Is a cylinder head temp sensor needed on a carburated car? It seems it is just for the "computer" on an FI car, but I need to clarify.

[Dave_Darling]

Note that the stock CHT sensor is not the same type as those used by the CHT gauges. It's also in an area of the head that changes fairly slowly. It's not a good data source for telling you much of anything about the engine.

Use the ring-type thermocouple around the spark plug which is the standard way to get CHT readings.

--DD

[930cabman]

Note that the stock CHT sensor is not the same type as those used by the CHT gauges. It's also in an area of the head that changes fairly slowly. It's not a good data source for telling you much of anything about the engine.

Use the ring-type thermocouple around the spark plug which is the standard way to get CHT readings.

--DD

(IMG:style_emoticons/default/headbang.gif)
Thank you Dave, I have also read the same, under the spark plug is the most accurate location for cyl head temp. Can this be problematic when changing spark plugs? I can see the ring getting lost when threading a new plug into the head

[VaccaRabite]

Note that the stock CHT sensor is not the same type as those used by the CHT gauges. It's also in an area of the head that changes fairly slowly. It's not a good data source for telling you much of anything about the engine.

Use the ring-type thermocouple around the spark plug which is the standard way to get CHT readings.

--DD

(IMG:style_emoticons/default/headbang.gif)
Thank you Dave, I have also read the same, under the spark plug is the most accurate location for cyl head temp. Can this be problematic when changing spark plugs? I can see the ring getting lost when threading a new plug into the head

Just grind a little groove into the boss for the wire to exit under the park plug. No big deal.

The first time you put in the plug it will be challenging. But you figure out how to do it and it is easy the rest of the time. You just have to rememeber to remove the washer from the plug you have the temp sender on.

Zach

[stownsen914]

Is it feasible to put the sparkplug ring sensor at the stock CHT sensor location (presumably using a bolt)?

[GregAmy]

Is it feasible to put the sparkplug ring sensor at the stock CHT sensor location (presumably using a bolt)?

You can, but it won't be useful info.

First, that location never gets as hot, or reacts as fast, as under the spark plugs.

Second - and most importantly - given "first" above you will not be able to compare that information to long-standing historical background:

http://www.914world.com/bbs2/index.php?sho...mp;#entry377466

Do it at the CHT if you just want another interesting gauge in the car. But if you want useful info, put it under the spark plug.

GA