[Diy_efi] schematic critique

Mike erazmus at iinet.net.au
Fri Feb 21 15:48:38 GMT 2003 

Hi J,

I dont seem to be getting a clear idea, can you intersperse your
answers to these questions:-

a.	Is there an in-tank fuel pump ?

b.	Is there a separate high pressure fuel pump, like a Bosch
	equivalent roller ball type pump ?

c.	The tank outlet that goes to the high pressure pump
	(if its not the in-tank one) - is it high up on the tank?

d.	Is there some sort of 'swirl-pot' so the fuel return
	keeps the crud away from the tank outlet to the pump ?

rdgs

mike



At 09:12 AM 21/2/2003 -0500, you wrote:
>
>it has a venturi valve, designed for a pump that can flow enough fuel for 
>300rwhp, and that certainly won't work when fuel flow has been increased to 
>two pumps that flow enough for 500rwhp each, it increases base pressure way 
>too high because of its restrictiveness.
>
>its quite a ghey setup, but what can you do but try and beat it?
>
>-j
>
>
>
>
>
>
>>From: Mike <erazmus at iinet.net.au>
>>Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>>To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>>Subject: Re: [Diy_efi] schematic critique
>>Date: Fri, 21 Feb 2003 20:10:47
>>
>>At 02:13 AM 20/2/2003 -0500, you wrote:
>> >there currently is no fittings on the bottom of the tank, only straps 
>>that
>> >hold it in place
>>
>>mmmmm ? so what is used to supply fuel in the first place from the
>>main tank ?
>>
>>Is there an in-tank fuel pump and the feed out from this is somewhat
>>higher than the bottom of the tank ?
>>
>> >i do have a digi cam, when i put the trans back in her, i will try and 
>>snap
>> >some pics for you
>>
>>Yeah great, sounds like a curious setup...~`:o <shrug>
>>
>>rgds
>>
>>mike
>>
>>
>>
>> >
>> >-j
>> >
>> >
>> >
>> >
>> >
>> >
>> >>From: Mike <erazmus at iinet.net.au>
>> >>Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>> >>To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>> >>Subject: Re: [Diy_efi] schematic critique
>> >>Date: Thu, 20 Feb 2003 12:52:33
>> >>
>> >>At 06:08 PM 19/2/2003 -0500, you wrote:
>> >> >if i am understanding you correctly, you are mentioning to run it 
>>around
>> >>the
>> >> >back of diff, from one side to the other, to basically keep the same
>> >>height
>> >> >as going through the driveshaft, but going around the back of the diff
>> >> >instead?
>> >>
>> >>Well close enough, line can easily be protected and enough loop to
>> >>handle suspension travel, sure.
>> >>
>> >> >the problem with the orange line is described in the diagram, but that
>> >> >positions both the aluminum thread to barb fittings and the line under
>> >>the
>> >> >driveshaft, and lower than the frame rails of the car, which would 
>>make
>> >>it
>> >> >extremely susceptible to being ripped off by speed bumps and road 
>>debris.
>> >>
>> >>But you already have some fitting on one tank, presumably low down,
>> >>to get the fuel out - why not put a 'T' piece on that. On the other
>> >>side there is no need to have a fitting going straight down, it
>> >>can easily be put around the other side and be a 90deg fitting so
>> >>it doesnt face down etc...
>> >>
>> >>Got a digital camera ?
>> >>
>> >>rgds
>> >>
>> >>mike
>> >>
>> >>
>> >>
>> >>
>> >> >-j
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >>From: Mike <erazmus at iinet.net.au>
>> >> >>Reply-To: List for general do-it-yourself EFI talk 
>><diy_efi at diy-efi.org>
>> >> >>To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>> >> >>Subject: Re: [Diy_efi] schematic critique
>> >> >>Date: Wed, 19 Feb 2003 23:15:35
>> >> >>
>> >> >>Sorry, I meant to say 'back' of the diff with respect to direction
>> >> >>of travel. That way its very unlikely anything could ever hit it
>> >> >>unless you were to reverse hard over low bushes with really hard
>> >> >>stumps. In any case you'd use braided 1/2" hose with lots of
>> >> >>steel cable ties to keep it in place, length is not an issue
>> >> >>so if a foot or two were used up getting from tank to axle
>> >> >>with loop to take up suspension travel then its not a problem.
>> >> >>
>> >> >>rgds
>> >> >>
>> >> >>mike
>> >> >>
>> >> >>
>> >> >>
>> >> >>At 11:01 PM 19/2/2003, you wrote:
>> >> >> >OK, mmmm,
>> >> >> >
>> >> >> >Whats wrong with running the orange line along the front of the
>> >> >> >diff so it can't get 'torn' as suggested ?
>> >> >> >
>> >> >> >rdgs
>> >> >> >
>> >> >> >mike
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >At 02:04 AM 19/2/2003 -0500, you wrote:
>> >> >> >>hey mike,
>> >> >> >>
>> >> >> >>it is hard to picture, i drew a crappy rough sketch to try and 
>>make
>> >>it
>> >> >> >>easier to visualize
>> >> >> >>
>> >> >> >>here is the picture
>> >> >> >>
>> >> >> >>http://68.7.7.84:8080/schematics/gastank1.jpg
>> >> >> >>
>> >> >> >>let me know if there is any more confusion, just to add, its all
>> >>factory
>> >> >>in
>> >> >> >>placement and design, the only difference is that the factory fuel
>> >>pump
>> >> >> >>housing with venturi valve, had to be scrapped in favor of twin 
>>pumps
>> >> >> >>
>> >> >> >>thanks for the interest!
>> >> >> >>
>> >> >> >>-j
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>>From: Mike <erazmus at iinet.net.au>
>> >> >> >>>Reply-To: List for general do-it-yourself EFI talk
>> >> >><diy_efi at diy-efi.org>
>> >> >> >>>To: List for general do-it-yourself EFI talk 
>><diy_efi at diy-efi.org>
>> >> >> >>>Subject: Re: [Diy_efi] schematic critique
>> >> >> >>>Date: Wed, 19 Feb 2003 13:25:11
>> >> >> >>>
>> >> >> >>>mmmm, This is interesting, (for me) something doesnt sound
>> >> >> >>>right or I am way off in my understanding of what I speculate
>> >> >> >>>is an existing (factory) fuel tank configuration or is an
>> >> >> >>>afftermarket fuel tank.
>> >> >> >>>
>> >> >> >>>Is the lowest point of both fuel tanks lower than the driveshaft 
>>?
>> >> >> >>>
>> >> >> >>>Are they original factory tanks in original location ?
>> >> >> >>>
>> >> >> >>>Do you have a pic/sketch of the setup ?
>> >> >> >>>
>> >> >> >>>Having said that I recall a setup some years ago where a chap
>> >> >> >>>added an extra tank, the lowest part was just below the middle
>> >> >> >>>of his diff, he moved the existing low pressure in tank pump
>> >> >> >>>from the old tank to the new and left the outside tank high
>> >> >> >>>pressure pump in its old location.
>> >> >> >>>
>> >> >> >>>rgds
>> >> >> >>>
>> >> >> >>>mike
>> >> >> >>>
>> >> >> >>>
>> >> >> >>>
>> >> >> >>>
>> >> >> >>>At 12:01 AM 19/2/2003 -0500, you wrote:
>> >> >> >>> >it would be taken out by the driveshaft, and if i put it below 
>>the
>> >> >> >>> >driveshaft, it would be taken out by speed bumps and road 
>>debris
>> >> >> >>> >
>> >> >> >>> >otherwise, i would have LOVED such a simple option
>> >> >> >>> >
>> >> >> >>> >-j
>> >> >> >>> >
>> >> >> >>> >
>> >> >> >>> >
>> >> >> >>> >
>> >> >> >>> >
>> >> >> >>> >
>> >> >> >>> >>From: Mike <erazmus at iinet.net.au>
>> >> >> >>> >>Reply-To: List for general do-it-yourself EFI talk
>> >> >><diy_efi at diy-efi.org>
>> >> >> >>> >>To: List for general do-it-yourself EFI talk
>> >><diy_efi at diy-efi.org>
>> >> >> >>> >>Subject: Re: [Diy_efi] schematic critique
>> >> >> >>> >>Date: Wed, 19 Feb 2003 12:40:25
>> >> >> >>> >>
>> >> >> >>> >>What the heck is wrong with just a pipe and a takeoff at the
>> >> >> >>> >>lowest point ?
>> >> >> >>> >>
>> >> >> >>> >>rgds
>> >> >> >>> >>
>> >> >> >>> >>mike
>> >> >> >>> >>
>> >> >> >>> >>
>> >> >> >>> >>At 11:36 PM 18/2/2003 -0500, you wrote:
>> >> >> >>> >> >if it works :)
>> >> >> >>> >> >
>> >> >> >>> >> >(you have a good memory mike!)
>> >> >> >>> >> >
>> >> >> >>> >> >
>> >> >> >>> >> >
>> >> >> >>> >> >
>> >> >> >>> >> >
>> >> >> >>> >> >
>> >> >> >>> >> >>From: Michael Beebe <beebe_mike at comcast.net>
>> >> >> >>> >> >>Reply-To: List for general do-it-yourself EFI talk
>> >> >> >>><diy_efi at diy-efi.org>
>> >> >> >>> >> >>To: List for general do-it-yourself EFI talk
>> >> >><diy_efi at diy-efi.org>
>> >> >> >>> >> >>Subject: Re: [Diy_efi] schematic critique
>> >> >> >>> >> >>Date: Tue, 18 Feb 2003 23:30:28 -0500
>> >> >> >>> >> >>
>> >> >> >>> >> >>Is this circuit for your fuel tank transfer pump? Just
>> >>curious.
>> >> >> >>> >> >>
>> >> >> >>> >> >>Mike
>> >> >> >>> >> >>
>> >> >> >>> >> >>
>> >> >> >>> >> >>_______________________________________________
>> >> >> >>> >> >>Diy_efi mailing list
>> >> >> >>> >> >>Diy_efi at diy-efi.org
>> >> >> >>> >> >>http://www.diy-efi.org/mailman/listinfo/diy_efi
>> >> >> >>> >> >
>> >> >> >>> >> >
>> >> >> >>> >>
>> >> >_________________________________________________________________
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>> >> >> >>> >> >http://www.diy-efi.org/mailman/listinfo/diy_efi
>> >> >> >>> >> >
>> >> >> >>> >> >
>> >> >> >>> >>
>> >> >> >>> >>_______________________________________________
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>> >> >> >>> >>http://www.diy-efi.org/mailman/listinfo/diy_efi
>> >> >> >>> >
>> >> >> >>> >
>> >> >> >>> 
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>> >> >> >>> >
>> >> >> >>> >
>> >> >> >>>
>> >> >> >>>_______________________________________________
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>> >> >> >>
>> >> >> >>
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>> >> >> >>_______________________________________________
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>> >> >> >>
>> >> >> >>
>> >> >> >
>> >> >> >_______________________________________________
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>> >> >> >Diy_efi at diy-efi.org
>> >> >> >http://www.diy-efi.org/mailman/listinfo/diy_efi
>> >> >> >
>> >> >> >
>> >> >>
>> >> >>_______________________________________________
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>> >> >
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>> >> >http://www.diy-efi.org/mailman/listinfo/diy_efi
>> >> >
>> >> >
>> >>
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>> >>http://www.diy-efi.org/mailman/listinfo/diy_efi
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>> >
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>> >
>> >
>>
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