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

Ken Green kenn_green at yahoo.com
Wed Jul 29 17:39:44 EDT 2020 

 The largest wires (12 ga) are for the injectors.  I guess FAST wants them separate from wires for the processor?  I will run other wires for an electric water pump and fuel pump, I think both 20 amps, planning 14 ga.
I know weird things can happen when current flows in wires, some not intuitive.  Those darn magnetic fields.  I guess the varying current to the injectors might be an issue, but I don't recall shielding the power wires to the injectors?  

Ken



    On Wednesday, July 29, 2020, 12:05:38 AM PDT, Thomas Törnblom <thomas at hax.se> wrote:  
 
 Well, the battery does indeed act as a huge filter capacitor so it makes sense to feed the EFI from there if it is sensitive to noise.

As you have eliminated the ammeter that doesn’t matter either. 

Are you feeding the fuel pump from there too?

The major current draw will be the fuel pump, injectors and hego heaters. The controller itself won’t be much I assume. 

Thomas

> 29 juli 2020 kl. 07:12 skrev Ken Green via DeTomaso <detomaso at server.detomasolist.com>:
> 
>   I posted the question to the Facebook XFI forum and all the responses
>  were that both the +12V and ground had to be directly connected to the
>  battery, and not doing that is a common source of problems.
>  Ken
> 
>  On Tuesday, July 28, 2020, 9:09:01 AM PDT, Thomas TAP:rnblom
>  <tipo874 at gmail.com> wrote:
>  I assume you are not planning to only crank the engine :)
>  I would wire it up for best performance when running.
>  Iam using a Ford EFI and it has a table that adjust the pulse width
>  depending on supply voltage, which compensates for voltage drop during
>  cranking and heavy current draw when idling.
>  Thomas
>>> 28 juli 2020 kl. 18:01 skrev Thomas TAP:rnblom
>>  <[1]tipo874 at gmail.com>:
>> 
>> i>>?Iam using the bung in the pipe from the thermostat to the swirl
>  tank, where the vacuum thermo-switch was located.
>> 
>> I have drilled a couple of small holes in the thermostat so there is
>  some flow there even when the thermostat is closed.
>> 
>> Thomas
>> 
>>> 28 juli 2020 kl. 17:53 skrev Richard Greenblum
>  <[2]richard at richardgreenblum.com>:
>>> 
>>> i>>?All,
>>> 
>>> Where did you locate the water temp sensor for the EFI system?  With
>  no water in the intake, 351Cas are short one location.  Iam 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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> References
> 
>  1. mailto:tipo874 at gmail.com
>  2. mailto:richard at richardgreenblum.com
>  3. mailto:DeTomaso at server.detomasolist.com
>  4. http://server.detomasolist.com/mailman/listinfo/detomaso
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-------------- next part --------------
   The largest wires (12 ga) are for the injectors.  I guess FAST wants
   them separate from wires for the processor?  I will run other wires for
   an electric water pump and fuel pump, I think both 20 amps, planning 14
   ga.
   I know weird things can happen when current flows in wires, some not
   intuitive.  Those darn magnetic fields.  I guess the varying current to
   the injectors might be an issue, but I don't recall shielding the power
   wires to the injectors?
   Ken

   On Wednesday, July 29, 2020, 12:05:38 AM PDT, Thomas TAP:rnblom
   <thomas at hax.se> wrote:
   Well, the battery does indeed act as a huge filter capacitor so it
   makes sense to feed the EFI from there if it is sensitive to noise.
   As you have eliminated the ammeter that doesnat matter either.
   Are you feeding the fuel pump from there too?
   The major current draw will be the fuel pump, injectors and hego
   heaters. The controller itself wonat be much I assume.
   Thomas
   > 29 juli 2020 kl. 07:12 skrev Ken Green via DeTomaso
   <[1]detomaso at server.detomasolist.com>:
   >
   > i>>?  I posted the question to the Facebook XFI forum and all the
   responses
   >  were that both the +12V and ground had to be directly connected to
   the
   >  battery, and not doing that is a common source of problems.
   >  Ken
   >
   >  On Tuesday, July 28, 2020, 9:09:01 AM PDT, Thomas TAP:rnblom
   >  <[2]tipo874 at gmail.com> wrote:
   >  I assume you are not planning to only crank the engine :)
   >  I would wire it up for best performance when running.
   >  Iam using a Ford EFI and it has a table that adjust the pulse width
   >  depending on supply voltage, which compensates for voltage drop
   during
   >  cranking and heavy current draw when idling.
   >  Thomas
   >>> 28 juli 2020 kl. 18:01 skrev Thomas TAP:rnblom
   >>  <[1][3]tipo874 at gmail.com>:
   >>
   >> i>>?Iam using the bung in the pipe from the thermostat to the swirl
   >  tank, where the vacuum thermo-switch was located.
   >>
   >> I have drilled a couple of small holes in the thermostat so there is
   >  some flow there even when the thermostat is closed.
   >>
   >> Thomas
   >>
   >>> 28 juli 2020 kl. 17:53 skrev Richard Greenblum
   >  <[2][4]richard at richardgreenblum.com>:
   >>>
   >>> i>>?All,
   >>>
   >>> Where did you locate the water temp sensor for the EFI system?
   With
   >  no water in the intake, 351Cas are short one location.  Iam 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
   >>>
   >>> _______________________________________________
   >>>
   >>>
   >>> Detomaso Email List is not managed by POCA
   >>> Posted emails must not exceed 1.5 Megabytes
   >>> DeTomaso mailing list
   >>> [3][5]DeTomaso at server.detomasolist.com
   >>> [4][6]http://server.detomasolist.com/mailman/listinfo/detomaso
   >>>
   >>> 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.
   >  _______________________________________________
   >  Detomaso Email List is not managed by POCA
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   >  DeTomaso mailing list
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   etc.)
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   >  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. mailto:[9]tipo874 at gmail.com
   >  2. mailto:[10]richard at richardgreenblum.com
   >  3. mailto:[11]DeTomaso at server.detomasolist.com
   >  4. [12]http://server.detomasolist.com/mailman/listinfo/detomaso
   >  5. mailto:[13]DeTomaso at server.detomasolist.com
   >  6. [14]http://server.detomasolist.com/mailman/listinfo/detomaso
   >
   >
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   >
   >
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References

   1. mailto:detomaso at server.detomasolist.com
   2. mailto:tipo874 at gmail.com
   3. mailto:tipo874 at gmail.com
   4. mailto:richard at richardgreenblum.com
   5. mailto:DeTomaso at server.detomasolist.com
   6. http://server.detomasolist.com/mailman/listinfo/detomaso
   7. mailto:DeTomaso at server.detomasolist.com
   8. http://server.detomasolist.com/mailman/listinfo/detomaso
   9. mailto:tipo874 at gmail.com
  10. mailto:richard at richardgreenblum.com
  11. mailto:DeTomaso at server.detomasolist.com
  12. http://server.detomasolist.com/mailman/listinfo/detomaso
  13. mailto:DeTomaso at server.detomasolist.com
  14. http://server.detomasolist.com/mailman/listinfo/detomaso
  15. mailto:DeTomaso at server.detomasolist.com
  16. http://server.detomasolist.com/mailman/listinfo/detomaso
  17. mailto:DeTomaso at server.detomasolist.com
  18. http://server.detomasolist.com/mailman/listinfo/detomaso

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