I am looking at some gauges online to purchase for my car. Mostly looking at the Lunar 52mm series from Autometer. I just need help picking up 3 more gauges. If you guys could help me out with some simple questions for you probably but unknowns for me. Thanks!

Water Temperature Gauge 100-250F [electric]
1.) Where in the engine does this go/excatly what water temp does it measure?
2.) Is it really one of the more important ones to have?

Pyrometer 0-1600F [electric]
1.) Where does this one go?
2.) What would it be used for?
3.) How important is it?
4.) Why does the temperature go up so high?

Trans Temperature 100-250F [electric]
1.) Does this measure the transmition fluid temp?
2.) What does it do for a stickshift?
3.) Is it one of the more important ones?

Boost 35 PSI [mechanical]
1.) I want to wire this up just for the Nitrous boost, is this a good gauge to do it with?
2.) How would I connect it to see my boost from nitrous when I am on the button?

I am also getting/have goten these gauges already:
Oil Press. 2 1/16 [electrical]
Volt Meter 2 1/16 [electrical]
Fuel Pressure 0-100 PSI [electrical]
Air Fuel Ratio [electrical]
Nitrous Pressure 2 1/16 [mechanical]

1.) Out of the 4 listed which 3 do you guys think that I should get?
2.) I heard that since the Nitrous pressure gauge is mechanical, having it inside the car might cause problems and might break? Is this true? Any input? I want it on the insdie what can I do?

Thanks guys!

Any additional input or information about the gauges or anything let me know please.

Water Temperature Gauge 100-250F [electric]
1.) Where in the engine does this go/excatly what water temp does it measure?
2.) Is it really one of the more important ones to have?


The water temp sensor can go anywhere in the coolant line. I cut the upper radiator hose in half, and installed a home-made piping to install the sensor. You can use the heater-hose, or even try to T-off one of the coolant sensors. Stock coolant gauge (on your dash) is unreliable. It's a "Off-Good-Bad" gauge. The aftermarket ones will give you more accurate readings on the water temp.


Pyrometer 0-1600F [electric]
1.) Where does this one go?
2.) What would it be used for?
3.) How important is it?
4.) Why does the temperature go up so high?

1) It goes on the exhaust manifold, about 3 inches from the block. Many people like to use the #3 cylinder.
2) To measure the exhaust temperature.
3) Important if you modify your engine to accept more horsepower using turbo or nitrous because without proper fueling, the engine would lean out and explode!
4) It goes so high because that's the exhaust temperature.


Trans Temperature 100-250F [electric]
1.) Does this measure the transmition fluid temp?
2.) What does it do for a stickshift?
3.) Is it one of the more important ones?

Yes, it measures the trans fluid temp. It's important if you race often.


Boost 35 PSI [mechanical]
1.) I want to wire this up just for the Nitrous boost, is this a good gauge to do it with?
2.) How would I connect it to see my boost from nitrous when I am on the button?

1) No. Nitrous pressure is a lot higher than boost pressure.


I am also getting/have goten these gauges already:
Oil Press. 2 1/16 [electrical]
Volt Meter 2 1/16 [electrical]
Fuel Pressure 0-100 PSI [electrical]
Air Fuel Ratio [electrical]
Nitrous Pressure 2 1/16 [mechanical]

1.) Out of the 4 listed which 3 do you guys think that I should get?
2.) I heard that since the Nitrous pressure gauge is mechanical, having it inside the car might cause problems and might break? Is this true? Any input? I want it on the insdie what can I do?

1) I would get pyrometer, water temp, and boost gauge.
2) I think you need to use S.S. lines for Nitrous, so it should be fine.

SS lines?.......

Oh and THANK YOU SO MUCH for the response, its been very helpfull!

To measure the Nitrous pressure on a remote location (i.e. dash), you need to feed the line to the gauge. I believe you have to use a stainless steel (S.S.) line. That's what I meant :)

Why choose a mechanical gauge for such a high pressure...

Is it because electrical pressure gauges appropriate for the nitrous' pressure range are hard/impossible to find?

Even with ss lines, over time, a leak could develop, couldn't it?