Fuel Injected CHT under #3, Question about FI and CHT Options

[nditiz1]

So I know that FI cars use the CHT from the factory to make the magic happen (IMG:style_emoticons/default/biggrin.gif) (you D/L-jet guys and your mysterious voodoo) , but do you guys also put an additional one under #3 for cockpit info purposes? Does the factory one shutdown the motor if temps get too high? (Now that would be cool)

[BeatNavy]

So I know that FI cars use the CHT from the factory to make the magic happen (IMG:style_emoticons/default/biggrin.gif) (you D/L-jet guys and your mysterious voodoo) , but do you guys also put an additional one under #3 for cockpit info purposes? Does the factory one shutdown the motor if temps get too high? (Now that would be cool)

Yes, if you want head temp info it is typical to use a sender (e.g., thermocouple) under #3 sparkplug. The CHT is actually located next to cylinder 3, and all it does is send info to the ECU for balancing mixture based on engine temps. It won't shut the engine down (as a safety), but it will shut down the engine if it fails in open mode (e.g., disconnected). The ECU will make the mixture way too rich at that point and essentially flood it.

[tmc914]

So I know that FI cars use the CHT from the factory to make the magic happen (IMG:style_emoticons/default/biggrin.gif) (you D/L-jet guys and your mysterious voodoo) , but do you guys also put an additional one under #3 for cockpit info purposes? Does the factory one shutdown the motor if temps get too high? (Now that would be cool)

Yes, if you want head temp info it is typical to use a sender (e.g., thermocouple) under #3 sparkplug. The CHT is actually located next to cylinder 3, and all it does is send info to the ECU for balancing mixture based on engine temps. It won't shut the engine down (as a safety), but it will shut down the engine if it fails in open mode (e.g., disconnected). The ECU will make the mixture way too rich at that point and essentially flood it.

So, where could I get one of these under the spark plug CHT sensors? Need a gauge to go with it also. Kinda like digital gauge that would have analog graphic too. Ones I looked at from another thread were for all 4 cylinders and seemed like overkill. Anyone recommend a simple CHT sensor and gauge? Maybe a combo so oil pressure could also be checked.