[DeTomaso] "proper" radiator fan sensor location??

B Hower b.hower3400 at yahoo.com
Wed Mar 28 17:58:42 EDT 2018 

Yes, my Ron Davis has a top bleed port.


Bud #3400 ( Drive it like there is no tomorrow -- for there may not be ! ) 

    On Wednesday, March 28, 2018, 2:36:36 PM CDT, Julian Kift <julian_kift at hotmail.com> wrote:  
 
   IMO sensor location can be either inlet or outlet; I would look at it
  like a simple control loop which can be feed forward (predictive) or
  feedback (reactive). What will change between the two locations is the
  sensor temperature setting that triggers the fans, the inlet side
  requiring a higher temp rating by the anticipated degrees of cooling
  across the radiator to get to a predictive output.

  With a large Ron Davis radiator and big ass fans one would hope that
  the limitation of the cooling system is not the radiator, so it has
  more cooling capacity than required under most circumstances. I
  installed a controllable fan thermostat so one can make initial
  adjustment to have the engine run at your desired optimal temperature.
  Whatever be sure to choose an engine thermostat and fan thermostat
  temperature range that compliment each other and not fighting.

  On the question of inlet and outlet locations on the radiator I am in
  two minds and would welcome expert opinion. The water pump is a suction
  pump and thus a bottom radiator outlet provides more head to it
  and could decrease any tendency for cavitation. Conversely a top exit
  could help air rise and escape (albeit the exit is not at the top of
  the tank), does the Ron Davis have a top bleed capability?

  Julian
    __________________________________________________________________

  From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
  Larry Finch via DeTomaso <detomaso at server.detomasolist.com>
  Sent: Wednesday, March 28, 2018 11:45 AM
  To: Email List Address For Posting
  Subject: [DeTomaso] "proper" radiator fan sensor location??

  All,
  I've run this through the DeTomaso forums and received varying replies.
  So, let's see what the email list has to say.
  The Ron Davis double pass sold by Quella has two sensor bungs located
  in the INLET tank.
  The Fluidyne double pass has a sensor bung located in both the INLET
  and OUTLET tanks.
  eBay offered double pass radiator, by Superior radiator, has one sensor
  bung located in OUTLET tank.
  Wizard radiator double pass has one bung in the OUTLET tank
  Stock Pantera double pass has inlet tank on the bottom, outlet tank on
  the top of radiator. Assuming horizontal baffle in tank.
  I don't believe the radiator cares, for cooling purposes,  whether
  inlet is bottom or top. But due to the undercar pipe locations and the
  limited space,
  it doesn't seem too easy to re-plumb the Pantera inlet to the top tank.
  So Pantera inlet will generally be the bottom tank.
  So, where is the proper location for a single temp sensor to control
  two sucker fans?
  INLET or OUTLET?
  Thanks,
  Larry
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-------------- next part --------------
   Yes, my Ron Davis has a top bleed port.
   Bud #3400 ( Drive it like there is no tomorrow -- for there may not be
   ! )
   On Wednesday, March 28, 2018, 2:36:36 PM CDT, Julian Kift
   <julian_kift at hotmail.com> wrote:
     IMO sensor location can be either inlet or outlet; I would look at it
     like a simple control loop which can be feed forward (predictive) or
     feedback (reactive). What will change between the two locations is
   the
     sensor temperature setting that triggers the fans, the inlet side
     requiring a higher temp rating by the anticipated degrees of cooling
     across the radiator to get to a predictive output.
     With a large Ron Davis radiator and big ass fans one would hope that
     the limitation of the cooling system is not the radiator, so it has
     more cooling capacity than required under most circumstances. I
     installed a controllable fan thermostat so one can make initial
     adjustment to have the engine run at your desired optimal
   temperature.
     Whatever be sure to choose an engine thermostat and fan thermostat
     temperature range that compliment each other and not fighting.
     On the question of inlet and outlet locations on the radiator I am in
     two minds and would welcome expert opinion. The water pump is a
   suction
     pump and thus a bottom radiator outlet provides more head to it
     and could decrease any tendency for cavitation. Conversely a top exit
     could help air rise and escape (albeit the exit is not at the top of
     the tank), does the Ron Davis have a top bleed capability?
     Julian
       __________________________________________________________________
     From: DeTomaso <[1]detomaso-bounces at server.detomasolist.com> on
   behalf of
     Larry Finch via DeTomaso <[2]detomaso at server.detomasolist.com>
     Sent: Wednesday, March 28, 2018 11:45 AM
     To: Email List Address For Posting
     Subject: [DeTomaso] "proper" radiator fan sensor location??
     All,
     I've run this through the DeTomaso forums and received varying
   replies.
     So, let's see what the email list has to say.
     The Ron Davis double pass sold by Quella has two sensor bungs located
     in the INLET tank.
     The Fluidyne double pass has a sensor bung located in both the INLET
     and OUTLET tanks.
     eBay offered double pass radiator, by Superior radiator, has one
   sensor
     bung located in OUTLET tank.
     Wizard radiator double pass has one bung in the OUTLET tank
     Stock Pantera double pass has inlet tank on the bottom, outlet tank
   on
     the top of radiator. Assuming horizontal baffle in tank.
     I don't believe the radiator cares, for cooling purposes,  whether
     inlet is bottom or top. But due to the undercar pipe locations and
   the
     limited space,
     it doesn't seem too easy to re-plumb the Pantera inlet to the top
   tank.
     So Pantera inlet will generally be the bottom tank.
     So, where is the proper location for a single temp sensor to control
     two sucker fans?
     INLET or OUTLET?
     Thanks,
     Larry
     _______________________________________________
     Detomaso Email List is not managed by POCA
     Posted emails must not exceed 1.5 Megabytes
     DeTomaso mailing list
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     To manage your subscription (change email address, unsubscribe, etc.)
     use the links above.
     Members who post to this list grant license to the list to forward
   any
     message posted here to all past, current, or future members of the
     list. They also grant the list owner permission to maintain an
   archive
     or approve the archiving of list messages.
   References
     1. [5]http://server.detomasolist.com/mailman/listinfo/detomaso
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   Members who post to this list grant license to the list to forward any
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   or approve the archiving of list messages.

References

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