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Thread: Which Thermostat?

  1. 20th December 2010, 11:46 PM #1
    milld's Avatar
    milld
    milld is offline Master
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    Which Thermostat?

    I'm contemplating on which thermostat to get for the RRC 93 v8?

    74
    82
    88

    Now I live in Central QLD, so the temp gets pretty hot here, and I'm thinking the 74C would be good and less sudden cooling on the block, but would this make it run more rich and poorer fuel economy? At what temp does the ecu change fuel rates?
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  2. 21st December 2010, 07:19 AM #2
    PhilipA
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    The ECU goes to "normal " at 80C signal from the ECU temp sensor.

    You will have no problem in QLD with 82C except on cold winter mornings which you can get there.

    I had an 82C but changed back to 88C as I was concerned that in winter it may not go over 80c on the sensor.
    Someone on here reported rigging up a switch to fool the ECU by having the sensor report 300 Ohms via a resistor. If you were that keen you could run a 74C with that mod.
    BUT I am sure you realise that the temp should not rise from the thermostsat temp significantly (certainly not on the gauge) if the cooling system is in good nick, and a cool thermostat gives you only an extra minute or so if the car starts to overheat.
    Regards Philip A
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  3. 21st December 2010, 07:28 AM #3
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    Blknight.aus
    Blknight.aus is offline RoverLord Vendor
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    of those 3 Id run the 82.

    I prefer an 84 as 84 degrees is acceptable across the entire range of landy engines and it means I only have to remember 84 degrees for diagnostic reasons.
    Dave

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