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914World.com _ 914World Garage _ Bought a CHT Gauge

Posted by: McMark Nov 23 2006, 01:34 AM

I finally invested in a CHT gauge. http://www.aircraftspruce.com/catalog/inpages/CHT_gauges2.php
IPB Image

I wanted to get a temperature compensating model. VDO CHT gauges read high or low depending on the ambient temperature in the cabin. And as a bonus, this model is about $15 cheaper than the VDO.

It should be here Saturday, and then I get to install it. It will be interesting to see what my head temps are running at with 9.5:1 compression.

I wanted to get a baseline of CHT and oil temps before I pull the motor and upgrade the cam.

Posted by: Hammy Nov 23 2006, 02:12 AM

Looks cool Mark.
I like the temperature compensation
I've been meaning to get a CHT gauge for myself.

Do you know if it comes with the sender and wires?

Posted by: McMark Nov 23 2006, 05:25 AM

You can buy them on the same site. Click on Instruments and the Probes & Senders. You need the 14mm setup. I can get you part numbers if you need them.

Posted by: bd1308 Nov 23 2006, 08:27 AM

I bought one from Dakota Digital. I like it, it compensates too.

Nice job though, there's something about analog gauges...

Posted by: Demick Nov 23 2006, 10:28 AM

Gotta laugh at the description. They advertise 2% accuracy, but you can only read the gauge to about the nearest 25 degrees.

Posted by: PinetreePorsche Nov 23 2006, 10:51 AM

So where does this one read the temp, and what do you have to do to install the sensor land lead? -Chris H.

Posted by: McMark Nov 23 2006, 12:25 PM

The thermocouple (sender) goes under the #3 spark plug. Just unscrew the plug, slip the thermocouple around it like a washer, and then screw it back in. Route the wire through the factory harness and to the gauge. No problem. I'll take pictures when I install mine, should take about an hour.

Posted by: PinetreePorsche Nov 24 2006, 07:05 AM

OK--even went to the spruce link and looked at it. Still don't know: what does 1-2-3 and 2-4-6 refer to? Hundreds of degrees? Why not 180 to 34o, spread across the dial? Why am I clueless? -Chris H