Re: [AMC-list] EFI 196 conversion issues (fuel pump)

[tom jennings <tomj@xxxxxxx>]

I've run mine down to less than 2 gallons with no problem. Stock pickup,
pump is lower than the tank so it ought to be as good as stock.


On Sun, Jun 21, 2009 at 18:21, Wrambler <wrambler242@xxxxxxxxxxx> wrote:

> I have my pump mounted externally in front of the rear axle where Tom
> suggest.
> Been there for a LONG time now. No issues at all.
> Being fully aware of possible problems with the stock pickup I ALWAYS
> refuel at 1/4 tank and take no chances.
>
> Someday I'd like to redo the setup to in tank or at least a larger feed
> tube from tank to pump, but the someday list is pretty long and I don't know
> that I will ever get to it!
>
> Mark Price
> Morgantown, WV 26508
> 1969 AMC Rambler, 4.0L, EFI, T-5
> 2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
> "I realize that death is inevitable.
> I just don't want to be around when it happens!"
>
> ----- Original Message -----
> From: "Frank Swygert" <farna@xxxxxxx>
> To: amc-list@xxxxxxxxxxxx
> Sent: Sunday, June 21, 2009 11:41:01 AM GMT -05:00 US/Canada Eastern
> Subject: Re: [AMC-list] EFI 196 conversion issues (fuel pump)
>
> The pumps are generally pushers, but no more than 3 feet on the suction
> end appears to be just fine. If there is some head pressure (pump lower
> than tank) you can put it a good deal further away, but I wouldn't go
> more than 5-6 feet. No t a worry in your case, of course! You might want
> to put a splash shield over the pump though. More to keep rocks and road
> debris from hitting it than water. A flat piece of sheet metal screwed
> into the bottom flat of the rail and over the pump, maybe bent up toward
> the floor around it. You won't have to worry about starving the pump on
> a hill. Since there is no sump for the pickup you can if there's not
> more than 3-4 gallons of fuel in the tank. Just keep it at 1/8th tank or
> more. I only had that problem once when running the stock 63 Classic
> tank with pickup in the middle. Had less than 1/8th tank and parked on a
> hill with the car sideways. Just enough to starve it! Had to push it to
> a level to start, then got gas. Should have BEFORE stopping. NEVER had a
> problem while driving though. My current tank has a dam in it, making
> the lower front portion more or less a sump. Pickup is to the left side.
> When the gauge reads empty I have about four gallons in it, which is
> plenty to keep it from starving, but if I run it down to about three
> gallons it will start to catch air on turns. So when it reads empty, I
> fuel up! If you use a common pump you shouldn't have to worry about
> keeping a spare. Just keep the original application and part number in
> the car. Even some of the in-tank pumps can be used externally. The Jeep
> XJ pump can (pre 96 only... 96+ has an in pump regulator that dumps fuel
> back in the tank). You would have to get screw-in fittings for the
> hoses. It will last a long time not in the tank. A common MPI pump is a
> Ford external pump. I have the number, but it won't do you much good --
> way too much pressure! I checked on those Holley pumps. I don't think
> steady pressure would be a problem with a regulator, the bypass line on
> that type system can be plumbed right back into the fuel line in front
> of the pump output but before the regulator, forming a loop. That should
> steady any pressure pulses. The big problem is the ones that put out 12
> psi (15.5-17, actually) are $431.95. A standard Holley TBI pump that
> puts out up to a steady 15 psi is $164.94. Still, I'd get a factory pump
> if available so you don't need to keep a spare. -------- From: tom
> jennings <tomj@xxxxxxx> Subject: Re: [AMC-list] d@mned holley carb anyway
>
> > >
> > > Tom, the fuel pump doesn't HAVE to be lower than the gas tank, but it
> will
> > > last longer if it has a little head pressure on it.
> >
> > OEMs get to design their systems well, us hobbiests have to work with
> huge
> > margins and limited choices. They are push pumps, not suckers, and I was
> > afraid that climbing a steep hill with a low tank the pump would starve.
> Not
> > good! Luckily that particular location on our cars is really convenient
> and
> > easy. The fuel line runs right by the area. Length on the suck side is
> under
> > 3 feet including the pickup.
>
> > --
> > Frank Swygert
> > Publisher, "American Motors Cars"
> > Magazine (AMC)
> > For all AMC enthusiasts
> > http://farna.home.att.net/AMC.html
> > (free download available!)
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>



-- 
All of your arguments are invalid.
Enjoy your unstable system.
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