Which is more important?
 

which is more important to keep an eye on oil temp or head temp? i only have enough room for one gauge so i have to decide.

Head temps.. give an more precise value of your engine.
(don't have experience with them but this is what I've heard)

Wiebrand

You could use the gauge for head temps and then use another indicator lamp / idiot light on a Berg dipstick to alert you to high oil temps. Should be fairly easy to find space for a 10mm indicator lamp.

Cheers
Jeremy

you can get a combo gauge from Westach and have both in one spot. i have a dual CHT like that from them. top of the line stuff...priced to match though. plan on $120 or so.

ZEN you have a pic of your dash?

why not use one gauge and two senders, work out what the max and min temps will be for both the head temp and the oil temp and get a gauge that covers the total range fit two sensors one for the head temp and one for oil temp run both the wires up to a two way switch and connect the signal wire from the gauge to the switch...the best of both worlds flick the switch left and have head temp, right and have oil temp and it will only cost you the extra sensor and the switch.

you could even run 3 sensors and a 3way switch that way you could have both left and right head temps and a oil temp as well.


simple

because typically, CHT is thermocouple and O/T is thermistor -- they work different and would be difficult to connect to the same gauge and have equal temp scales.

I'd recommend Westach also.

[QUOTE=Bill K.]because typically, CHT is thermocouple and O/T is thermistor -- they work different and would be difficult to connect to the same gauge and have equal temp scales.
QUOTE]

Well at least someone here has some knowlage, yes Bill your correct, as a rule oil temp and water temp gauges use the resistor type sender unit and head and exhaust temps are done via thermocouple and they don't work together very well.
I had assumed that someone wouldn't mix and match sender units, you can make a thermocouple take oil and water readings (very successfully)and make a resistor type sender unit measure head temp.
It would be easier to make a thermocouple measure oil temp than a resistor type sender unit measure head temp, (i think you would have to dril and tap the head to fit the sender)

I have use both of the above to measure temps on industrial machines both fluid temps and component temps, as a rule we would use the thermocouple type probe 95% of the time they easy to use and very versatile.

:)

pics is attached. not the greatest pic for what you want though. Westach is in the center of the gauge cluster under the ashtray area.