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

Thomas Törnblom thomas at hax.se
Wed Jul 29 03:05:17 EDT 2020


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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