64 Valiant IVR test
I wouldn't fool with the old thermo-mechanical IVR inside the fuel gage. I slipped heat shrink over the arm to disable it. Rather than the $30 ones on ebay (search "voltage limiter") or $60 one from RTE, last pass I bought a generic 5 V adjustable supply on Amazon for ~$10. Surprise, it looked just like the $30 ones. By having an adjustable output, you can tweak it to make either your fuel gage or temperature gage read perfectly (not both). There are other adjustments on the gage needles, though intended for factory-only. To get my fuel gage to read perfectly on the full side, I had to add parallel resistors across the sender (maybe 20 ohm, forget) on the backside of the cluster, but depends on the sender (mine was new from China). The main advantage of the RTE Vreg is that it gets the needles moving faster when you first power on (as the old one did), it that matters (not to me). Photo of my 1964 Valiant cluster (latest effort):
I wouldn't fool with the old thermo-mechanical IVR inside the fuel gage. I slipped heat shrink over the arm to disable it. Rather than the $30 ones on ebay (search "voltage limiter") or $60 one from RTE, last pass I bought a generic 5 V adjustable supply on Amazon for ~$10. Surprise, it looked just like the $30 ones. By having an adjustable output, you can tweak it to make either your fuel gage or temperature gage read perfectly (not both). There are other adjustments on the gage needles, though intended for factory-only. To get my fuel gage to read perfectly on the full side, I had to add parallel resistors across the sender (maybe 20 ohm, forget) on the backside of the cluster, but depends on the sender (mine was new from China). The main advantage of the RTE Vreg is that it gets the needles moving faster when you first power on (as the old one did), it that matters (not to me). Photo of my 1964 Valiant cluster (latest effort):
