Quote:
Originally Posted by KiLLeR2001
Not quite. You'll want to measure what is going into the engine. If the normal operating temperature is 180*F for example, you will want to maintain that 180*F entering into the engine. That lets you know that the thermostat is working and the radiator/fan setup is cooling properly.
edit: OP what radiator + efan setup are you using?
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But he want's to know why he's getting shitty MPG not how efficient his radiator is. Cluster sensor is right next to the ECU sensor.
S13 cluster with a S14 motor. Are you using a S13 sender(1 wire) for the cluster?
The 2 wire should match the ECU and the 1 wire should match the cluster(s13/s14).
I noticed a major improvement on warmup going from a 160 to the stock 180. A lot of the low temp thermos have a much different opening curve than an oem style.