[DeTomaso] Relays, Fans, Ammeter, second thoughts and project expansion

Tue Oct 16 18:01:20 EDT 2012

Pushing the brake pedal will probably have the same effect. 

With MSD and similar ignitions, it may be the current flowing backwards through the alternator idiot lamp that keeps it running.

I had a similar ignition on an old Volvo in the 70:s, and it used so little power that the current through the idiot lamp kept it going.

Inserting a diode in the lamp circuit will fix that problem. 

Thomas

16 okt 2012 kl. 22:59 skrev Charles McCall <charlesmccall at gmail.com>:

> Your engine will stop just fine if you touch the power window button.
> 
> That's what I have to do to turn off my motor... It does that even
> without the fans on, I think, so I don't think that is the cause. I
> have a solution so I don't lose sleep.
> 
> On 10/16/12, Mikael <mikael_hass at mail.tele.dk> wrote:
>> I guess it does, after looking at the wiring diagramme. But with a shunted
>> amp gauge, no big problem. Not as big as an engine that won't stop.
>> 
>> Mikael
>> 
>> 
>> 
>> Fra: Tomas Gunnarsson [mailto:guson at home.se]
>> Sendt: 16. oktober 2012 21:29
>> Til: mikael_hass at mail.tele.dk
>> Cc: DeTomaso at realbig.com
>> Emne: Re: [DeTomaso] Relays, Fans, Ammeter,second thoughts and project
>> expansion
>> 
>> 
>> 
>> Actually, connecting it that way ensures that all the energy consumed by
>> the
>> fans has to pass the ammeter.
>> 
>> 
>> 
>> Tomas
>> 
>> <-----Ursprungligt Meddelande----->
>> From: Mikael [mikael_hass at mail.tele.dk]
>> 
>> Sent: 16/10/2012 7:16:41 PM
>> 
>> To: 'Dave'; MikeLDrew at aol.com; guido_detomaso at prodigy.net;
>> DeTomaso at realbig.com
>> 
>> Subject: Re: [DeTomaso] Relays, Fans, Ammeter,second thoughts and project
>> expansion
>> 
>> 
>> Pantera Electronics make great things, I have their white and yellow in one
>> parking/signal lamp. But there is another way to get the fans away from the
>> fuse block. I've taken power straight from the battery to the relay. That
>> has four advantages, one disadvantage:
>> Advantages:
>> -Simple, as in you won't get stranded anywhere because of this
>> -Cheap, no purchase necessary
>> -Stopped my car from running on when key is turned off. I'm not educated
>> enough to fully understand why, but I was told so, and it works
>> -No extra juice/heat past the amp gauge
>> Disadvantage:
>> When the fans turn on, your amp gauge goes to the right instead of the left
>> (This can be an advantage also, because it's a sure way to see when the
>> thermostat turns on a fan, I discovered it is turned on way too often on my
>> car, will get a hotter thermostat for the fan)
>> 
>> Mikael
>> 
>> -----Oprindelig meddelelse-----
>> Fra: Dave [mailto:dave at damardirect.com]
>> Sendt: 15. oktober 2012 19:38
>> Til: MikeLDrew at aol.com; guido_detomaso at prodigy.net; DeTomaso at realbig.com
>> Emne: Re: [DeTomaso] Relays, Fans, Ammeter, second thoughts and project
>> expansion
>> 
>> Pantera Electronics has an amazing fan controller, power is removed from
>> the
>> fuse block.
>> Also, look at the replacement (plug n play) fuse block.
>> http://www.pantera-electronics.com/
>> 
>> IndyDave
>> 
>> 
>> 
>> -----Original Message-----
>> From: MikeLDrew at aol.com [mailto:MikeLDrew at aol.com]
>> Sent: Sunday, October 14, 2012 10:59 PM
>> To: guido_detomaso at prodigy.net; DeTomaso at realbig.com
>> Subject: Re: [DeTomaso] Relays, Fans, Ammeter, second thoughts and project
>> expansion
>> 
>> 
>> In a message dated 10/14/12 15 08 25, guido_detomaso at prodigy.net writes:
>> 
>> 
>>> 
>>> Starting to question the wisdom of adding another wire to the ammeter
>>> to feed the fans, now that it's installed of course.  Why not tap off
>>> the pink wires at the fuse box, which are on the same circuit and
>>> likely a shorter path to the alternator?  I think that was the
>>> approach in "Volts of Confidence" too.
>>> 
>> 
>>>>> The VofC mod involves adding a second fusebox to drastically shorten
>>>>> and
>> improve the current path for the fans. The aux fuseblock is powered by a
>> large-gauge wire hooked to the back of the ammeter; power wires then go
>> from
>> that fusebox directly to the fan relays, which are still switched normally.
>> 
>> (The fans are grounded locally with diodes as well). The problem with
>> that scheme is that the fans are powered all the time, and will run on
>> after
>> 
>> the ignition is switched off. Rick Moseley deals with that by adding more
>> relays, so the power from the aux fusebox to the fan relays passes through
>> ignition-switched relays.
>> 
>> Mike
>> 
>> 
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