When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
2025 c3 ('68-'73) of the Year Finalist - Unmodified
2025 Corvette of the Year Finalist - Modified
2024 C1 of the Year Winner - Modified
2023 C1 of the Year Finalist - Modified
2023 C3 of the Year Finalist - Unmodified
2022 C1 of the Year Finalist - Modified
2020 C1 of the Year Finalist - Modified
2019 C1 of Year Finalist (performance mods)
2018 C1 of Year Finalist
Yes I have one on my 57. An accurate sender in like trying to find a unicorn. It's basically a resistor that sets the temp gauge at a known temp. I set mine at 170 degrees from taking a reading on the water neck with a temperature gun. I believe the reading is only good for the temp you set on the gauge. Mine works great.
Does the unit need to be near the temp gauge? Access is difficult on a C2 - the temp gauge is above the ignition switch. It would be much easier to wire it in under the hood
If its wired as a simple "series-connected" rheostat it could go in the temp sender wire from the unit wherever is convenient... Somebody would have to verify.
Interestingly - this is the same fix the factory came up with for the inaccurate temp sender reading on my Sea Ray boat...calibrated for accuracy at 170*..
I saw nothing magic about wiring it in under the dash, other than to hide it from detection. But I have been wrong before about stuff I didn't think mattered. Lots of time on this forum alone