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Re: [GMCnet] In tank fuel pumps, or external pumps. [message #316394 is a reply to message #316390] Fri, 21 April 2017 13:31 Go to previous messageGo to previous message
Emery Stora is currently offline  Emery Stora   United States
Messages: 959
Registered: January 2011
Karma:
Senior Member
Chris
Actually, you can easily do it by just adding water to the gasoline. It will absorb the ethanol and then you can separate the water from the gasoline.
It is not very practicable for large amounts such as a motorhome tankful but some have done it for motorcycles and lawnmowers.
Here is an example:

http://goldwingdocs.com/forum/viewtopic.php?t=14679

One problem is that it will also leach out other additives which are useful in gasoline.
Also, removing the ethanol will reduce the Octane so you can end up with very low octane gasoline which might ping a lot.

Emery Stora
77 Kingsley
Frederick, CO

> On Apr 21, 2017, at 12:10 PM, Chris Tyler wrote:
>
> Ken Burton wrote on Thu, 20 April 2017 22:20
>> How about using a cheap ethanol / gasoline separator. (I have never seen one.) That would bring the RVP back to what we had before this EPA
>> madness. With the separator you could dump the excess ethanol in the exhaust just like the thermosan units, or you could mix it with water and put
>> it in the black tank for later disposal.
>>
>> We have guys at the airport doing this separation with water but it is a standalone operation. We have never found a use for the removed ethanol
>> and water mixture, so it just gets dumped. I'm sure the EPA is not happy about that but they are the ones who caused the problem in the first
>> place.
>
>
> I dont know of any practical way to remove ETOH from gasoline since they are miscable. Water and gasonine are not, so they easily separate and
> stratify via surface tension and density.
> In esoteric theory, I suppose you could heat it and the ETOH would vaporize first, but a number of the lighter elements in gassoline would as well.
>
>
> The main advantages for in tank pumps is they run cooler, are quieter and protected more from damage at the cost of inaccessibility . particularly
> important for fuel injection and High pressure. I cant think of any OEM FI using external pump, but someone on here may.
>
> That being said, if you are running carbed, I still think the Carter external as a booster with the mech pump is the way to go
>
> --
> 76 Glenbrook
>


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