[DeTomaso] Speaking of EFI--Water Temp Sensor Question

Will Kooiman will.kooiman at gmail.com
Tue Jul 28 16:24:31 EDT 2020


Best response is what Larry said in the other post.

Use the location below the thermostat for the EFI.

Btw, I used the heater hose location in my water pump, and it is wildly inaccurate.  It seems impacted by cool water from the radiator.  If I drive through rain, the temperature drops to 120 degrees.  This is with a mechanical Autometer gauge.  Once I get out of the rain, and everything stabilizes, it parks at 160 degrees.  I have different coolant routing, but I would think stock routing would behave the same way.

On 7/28/20, 2:59 PM, "DeTomaso on behalf of Richard Greenblum" <detomaso-bounces at server.detomasolist.com on behalf of richard at richardgreenblum.com> wrote:

    I screw that up and I’m in BIG trouble…rather destroy a head!

    > On Jul 28, 2020, at 13:43, David <david at msmcontractors.org> wrote:
    > 
    > Side of Block on Passenger side maybe?
    > David Finley
    > 3659
    > 
    >> On Jul 28, 2020, at 12:01 PM, Julian Kift <julian_kift at hotmail.com> wrote:
    >> 
    >>  What do you want to record or use as temperature for EFI control? The
    >>  water pump is a suction pump so at that point the temperature is prior
    >>  to any heat soak of the engine, not a true operating temperature.
    >>  Ideally for EFI I think you want the exit of the thermostat, which
    >>  poses a constraint prior to the thermostat opening.
    >> 
    >>  CHI offer the drilled for Clevor crossover option (i.e. when using a
    >>  dry Cleveland intake manifold) , attached their 3V drawing for port
    >>  location, but you should also be able to drill through the manifold to
    >>  tap into the head water passage. That is quite a common crossover to do
    >>  to reduce air pockets at the rea of the heads.
    >> 
    >>  Julian
    >>    __________________________________________________________________
    >> 
    >>  From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
    >>  Richard Greenblum <richard at richardgreenblum.com>
    >>  Sent: Tuesday, July 28, 2020 9:25 AM
    >>  To: Mike Drew <MikeLDrew at aol.com>
    >>  Cc: DeTomaso Mail List <detomaso at server.detomasolist.com>
    >>  Subject: Re: [DeTomaso] Speaking of EFI--Water Temp Sensor Question
    >> 
    >>  Mike,
    >>  That was my original plan, but Dennis Quella told me that location is
    >>  bad due to turbulence causing inaccurate readings.  If I have to, I can
    >>  connect the garage there and hope I don't have an issue with water
    >>  temp, but that would be pretty risky.  He suggested drilling a head.
    >>  CHI's are billet, so it's not obvious where the water jacket is.  I'd
    >>  have to ask them for a template or at least some guidance on where to
    >>  drill if that's where I end up...
    >>> On Jul 28, 2020, at 11:14, Mike Drew <MikeLDrew at aol.com> wrote:
    >>> 
    >>> All,
    >>> 
    >>> Aftermarket water pumps usually have two fittings with pipe plugs.
    >>  One is the inlet for a heater hose but I don't know what the other
    >>  would be used for? Could that be an option?
    >>> 
    >>> Mike
    >>> 
    >>> Sent from my iPad
    >>> 
    >>>> On Jul 28, 2020, at 08:52, Richard Greenblum
    >>  <richard at richardgreenblum.com> wrote:
    >>>> 
    >>>> All,
    >>>> 
    >>>> Where did you locate the water temp sensor for the EFI system?  With
    >>  no water in the intake, 351C's are short one location.  I'm very
    >>  reluctant to drill into the front of one of the heads (CHI 4V).  I
    >>  understand teeing off the current water temp sensor for the gauge will
    >>  not yield accurate water temps.
    >>>> 
    >>>> Thanks,
    >>>> 
    >>>> Richard
    >>>> Austin, TX
    >>>> 
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