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Thread: How hot is too hot

  1. 15th December 2008, 07:22 PM #1
    djam1's Avatar
    djam1
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    How hot is too hot

    Just reading Des Hammils book on how to tune Rover V8s and he states that the maximum operating temperature for a Rover V8 should be 80 Degrees C at all times.
    How do people feel about this??
    I personally suspect in the UK that could be all fine and dandy but in Australia I think he could be off the mark.
    Noticed my car was running at 85 Degrees C today and its only 40 odd
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  2. 15th December 2008, 07:46 PM #2
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    The Thor and Storm dont start to open the thermostat until 82 degrees. The Thor engine fan comes on at 100 degrees and the Storm fan comes on at 110 degrees.

    I suspect coolant, cooling efficiencies and engine management have improved since then.
    Cheers
    Slunnie


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  3. 15th December 2008, 07:48 PM #3
    d@rk51d3 Guest
    80 degrees was for a carby engine. I think for EFI, and pollution controls, around the mid 90's was required.

    Interesting to read how the HP drops away, as the engine temp climbs over 80.
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  4. 15th December 2008, 07:53 PM #4
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    Quote Originally Posted by d@rk51d3 View Post
    80 degrees was for a carby engine. I think for EFI, and pollution controls, around the mid 90's was required.

    Interesting to read how the HP drops away, as the engine temp climbs over 80.
    How quickly does it drop?
    Cheers
    Slunnie


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  5. 15th December 2008, 08:36 PM #5
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    Pretty sure my 76 Rangy had an 83deg thermostat.


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  6. 15th December 2008, 09:00 PM #6
    d@rk51d3 Guest
    Quote Originally Posted by Slunnie View Post
    How quickly does it drop?
    maximum power at 75 degrees. Once you hit 100, you've lost 10% of your power.
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  7. 15th December 2008, 09:04 PM #7
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    Quote Originally Posted by d@rk51d3 View Post
    maximum power at 75 degrees. Once you hit 100, you've lost 10% of your power.
    Ooooh, now there is a hot up tip!!!
    Cheers
    Slunnie


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  8. 15th December 2008, 09:05 PM #8
    mike 90 RR Guest
    Thermostats

    My understanding is

    88 degrees for EFI
    78 for carby

    If you do a search you will find a subject at length that PhillpA has done up regarding thermostats & the ECU
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  9. 15th December 2008, 09:45 PM #9
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    I'll back mike 90 RR that for the v8's the cast series 6+4 like it a little hotter.
    Dave

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  10. 15th December 2008, 11:05 PM #10
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    Yea its got an 82 so its not that bad but might try a 76 if I can get one
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