Cylinder Head Temps?

Discussion in 'PSI Superchargers Tech Questions' started by funnycarguy 230, Mar 16, 2007.

  1. funnycarguy 230

    funnycarguy 230 New

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    I Have Put A Cylinder Head Temperture Gauge On The Car. It's A Solid Block With Solid Heads On Alky What Range Should The Head Temps Run? Thanks
     
    #1
    funnycarguy 230, Mar 16, 2007
  2. ITS IN MY BLOOD

    ITS IN MY BLOOD TAFC

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    Once or twice, I checked head temps on our warm up, on alky
    JUST PRIOR TO SWITCHING TO NITRO...
    with a hand held thermo gun,
    it was reading 100 to 106 (external temp)
    then on the cackle, 118-124 after the tug.

    ANY body else have any readings for this question.
     
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    ITS IN MY BLOOD, Mar 17, 2007
  3. Mike Canter

    Mike Canter Top Dragster
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    I found that if you use a thermo gun directly on an aluminum head or block one gets a false low reading. If you paint a small flat black circle about the size of a quarter on the head or the block and take the temp of that black circle you will get a much higher more realistic reading. I would be interested if anyone else has experienced this.
     
    #3
    Mike Canter, Mar 17, 2007
  4. ITS IN MY BLOOD

    ITS IN MY BLOOD TAFC

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    so would this also be true at the starting line...
    its hotter than what the temp gage is reading,.. off of
    the flat black rubber surface..????? hmmmm
     
    #4
    ITS IN MY BLOOD, Mar 18, 2007
  5. Mike Canter

    Mike Canter Top Dragster
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    No, flat black or dark surface reads the correct temps. It is the aluminum surfaces or shiney surfaces that can read incorrectly.
     
    #5
    Mike Canter, Mar 18, 2007
  6. funnycarguy 230

    funnycarguy 230 New

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    I"m Running A Gauge That Has A Sending Unit That Is Screwed Into The Back Of The Head So Would That Be Different Than The Black Spot Thanks
     
    #6
    funnycarguy 230, Mar 18, 2007
  7. eli

    eli Banned

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    Are you running water in the heads? if not I don't think the sending unit will read air temp. inside the head??
     
    #7
    eli, Mar 18, 2007
  8. Mike Canter

    Mike Canter Top Dragster
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    I would think the gauge and the temp gun should read the same temp in the same area.
     
    #8
    Mike Canter, Mar 18, 2007
  9. Mike Canter

    Mike Canter Top Dragster
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    I try and heat the motor up to a thermo gun reading on the front of the head to about 130* because after I shut it off it tends to heat soak and the temp climbs for a while. The best temp for the oil is around 160* on warmup. I believe the best temp to have after the burnout prior to launch is probably somewhere between 170-180* to make the most power. This will probably give you around a 210-220* at the end of the run.
     
    #9
    Mike Canter, Mar 18, 2007
  10. bruce mullins

    bruce mullins Top Dragster

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    actually the gauge he his talking about is the type i used for years. it is an electrical gauge that has a small sending unit that you mount to the head. you have to drill a hole aproximatly .750 inch deep and thread with an 1/8 inch pipe tap. i used the gauge religiously to warm the car and for a certain temp that i always wanted the heads when i pre- staged . i looked at it as one varyable to eliminate. seemed to work for me. but as usual everyone has different ideas. just don't ask me what temps i ran. you can't afford that info jamie.
     
    #10
    bruce mullins, Mar 18, 2007
  11. clint thompson

    clint thompson Member

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    we used to run a head temp gage. the temp at stage was usually 185-200 and would acutally go down in high gear, then go up at the turnoff due to heat soak. we don't even use it anymore.
     
    #11
    clint thompson, Mar 29, 2007

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