Date:         Thu, 19 Oct 2017 12:15:20 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: World parts Radiator Fan Solution. I made a mistake!
Comments: To: Dennis Haynes <d23haynes57@hotmail.com>
Comments: cc: Thomas Casal <thomas.casal@gmail.com>
In-Reply-To:  <CY4PR20MB1303096C6B4EBAFDBC70BDD1A0420@CY4PR20MB1303.namprd20.prod.outlook.com>
Content-Type: text/plain; charset="UTF-8"

>
>  apologize for the confusing I may have created.
> For the later vans with AC the factory supplied resistor (251971284H) has
> two resistors within. The low speed resistor is .28 ohm. The intermediate
> speed used for the AC at elevated head pressure is .09 ohm.


The low speed fan runs both sections in series, so it would be 0.37 ohms.

450 watt fan at 14V would be ~32 amps, effective resistance of ~0.44 ohms.
Adding 0.37R would reduce total power to 240 watts, of which ~130 would go
to the fan and 110 to the resistor.


>
>
> The .33 ohm 100 watt resistor below is what I have been using for the
> early vans that had the resistor as part of the fan motor. You will need to
> solder on some leads and figure out a way to mount it.


On a 280W @ 14V fan, that would reduce total power to 150W, of which 81W
would go to the fan -- almost exactly the same power ratio as the big fan
with stock resistor.

Yrs,
d