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Something like I did with my boost gauge. Second pic is normal boost at highway speed. Third is dash shot towing an M35 out of Albany Ga. Boost will it 12psi on uphill climbs or when getting on interstate. Would love to know what my EGT was during that trip!
I have towed 12psi@2500rpm uphill. Figure about 800*F (post turbo probe w/D Turbo) w/ambient temp in 60-70*F range. If the hill is steep enough to pull rpms down (and it always is) the temperature slowly climbs as RPM and boost drop. Maybe 900*F around 2000rpm (9psi). Loitering at ~1600 (5-6psi) EGT gets too hot (975+*F). Down shifting increases boost and lowers EGT. I try to keep it below 975, though 1000 should be OK for, say, 10-20 seconds. Add 200-250*F if probe is ahead of the turbo. Add if ambient temp is higher.... Just conjecture, the C may run hotter than the D. I think the compressor may be less efficient at high boost levels. If so this would raise EGT too. Getting up to speed (on-ramp) does not drive temps up very much.
I paid just a tad over $200 or my EGT/Boost set up. I had them install 24 Volt LEDs and copied the black background and white numerals to match the OEM Deuce gauges. I like the idea you don't need a power source for the probe (K style), and with the factory installing the 24 Volt LED, no resistors or 12 Volt power source needed.
The “K” type thermocouple generates a voltage dependent on temperature. That way you do not need a power source for the pyrometer. That is why I went with the isspro turbocator. No need to have a power source unless you want a light.
A thermocouple is a temperature-measuring device consisting of two dissimilar conductors that contact each other at one or more spots. It produces a voltage when the temperature of one of the spots differs from the reference temperature at other parts of the circuit.
Its a isspro r609-10 and isspro r7603. 3" gauge bracket and 3 inch turbocator kit.
Congrats on your gauge purchase, I have been very happy with my Hewitt products. I didn't want to cut a buch of holes in the dash, so this is what I did...just a suggestion. I cut some 2" aluminum angle, and mounted that to a gauge panel I purchased from Jeg's or Summit. The only hole I drilled was in the top of the dash to run light power (tapped off the instrument lights), the thermocouple wires, and the air tubing. I packed these in plastic wire looming material.
