aftmkt INLINE FUEL PUMP?

[schnack]

Can Anyone give me some info about a possible application for an inline aftermarket fuel pump for the Focus? I am considering changing to a polypro. racing fuel cell....I have removed the interior and have had fuel cutoff problems ever since. I suspect an aftermarket fuel pump and a foam filled tank will solve my problems. Any info on available parts would be appreciated.

[PGZX3]

you should try over in the FI forum, 1turbofocus knows about this......

[CableSrv]

first off a fuel cell being a nice idea
a bit unrealistic
first if you put a fuel cell in
you'll most likly have to convert to a return style fuel system
next
where you going to mount it ?
won't fit in the stock location without a good fabrication!
next foam filled
while that would help in drag racing
i doub't you'll need it
also i don't think foam filled cells have a fuel sender in them
so how will you know if you are on a full tank ?
inline hmmm good idea
very good
i will be the first to admit our fuel tanks suck
badly
the fuel pump is beyond crap and the canister it sits in is awful i mean pure crap
beyond crap
if you where to switch out the intank with a venom intank you'd find problems
the pump would suck the canister dry and the 1 way valve will not flow enough fuel fast enough to resupply the venon pump
so you get starvation at 1/2 a tank and
if you let it go down to 1/4 a tank you best not try to rev past 4k
as the pump sucks so hard that the canister stays dry and this is not in a turn i mean in a straight path it does this [img]images/icons/frown.gif[/img]
a fuel cell would be a nice idea however expensive and you'd have to fabricate how to mount it along with converting your system to a return style system
next most fuel cells normally have the fuel filler up top well if you intend to mount it in stock location that causes a problem
as it's under the passager seats theres no way you can have a filler tube reach that area
i know i've taken my tank out at least 10 times
it's annoying and frustrating
i do believe i can have it dropped and reinstalled in 2 hours now!
the reason you'd mainly have to convert to a return is this
no aftermartket fuel pump that's inline was designed to match YOUR car's volt/fuel supply ammount
meaning if you applied 12v to your pump it'd put out say 100lph at 45psi but theres with 12v will put out 1001ph at 60psi
so it's not matched to your stock voltage
so the fuel pump would always pushing more than you need so you'd need to convert to a return to correct the ammount your injectors are getting.

i'm thinking of modifying my fuel canister to allow more flow to the fuel pump
which should correct the 1/2 and 1/4 tank issues
that would give me more fuel to my pump
i do believe you are experiencing fuel pump issues
and i'd suggest getting that replaced
ford will replace it but with another ford pump
i didn't want another pump that would go out again
so i ordered a venom

[ 02-15-2002: Message edited by: CableSrv ]</p>

[schnack]

Thanks for the insight. Here are some ideas&gt;&gt;&gt;&gt; I have removed my interior, including my spare tire. An 8-10 gallon poly-pro fuel cell available through Summit ranges between 110-150.00. (reasonable). Filling the tank could be done through the hatch. My gas mileage is very consistant, so i know approx. how much fuel i always have.
I understand the concerns about the voltage/psi readings and the increased fuel delivery. However, can't the aftermarket unit be adjusted? Or can i simply get one with a slightly higher psi/volt rating? The foam should solve the sloshing/starvation problem.
I am becoming increasingly interested in auto-xing and track days. In a race situation right now, i have to run with 3/4 tank of fuel. (too much unrcessary weight) I feel this setup is good solution to the stock problem. I am noticing a decreased accel. even in straight line performance when i register at or below a 1/4 tank. I can't imagine modifying the canister to the stock system, buying an aftermarket pump, still not solving the the fuel starvation problems.
More insight would be appreciated, thanks.

[CableSrv]

I doubt you could modify the new pump for the focus voltage map/fuel pressure
again the canister is where the problem lies
along with the pump
I do believe it's possible to insert a foam peice in the tank that we have already
however you'd need to cut an area out big enough to fit the size of the canister and enough room to allow the fuel sender's floating thing to move
however due to this there will be some slosh and so forth near the fuel sender but no where's else
I believe that if you enlarge the hole and get a bigger circular rubber peice and make a new 1 way valve you can allow more flow to the fuel pump
which would alow the venon to get the needed flow
which should solve the issue with 1/2 and 1/4 tank of gas!
if you could mount a fuel cell that would be awesome however you don't really need a foam filled one as long as you got a cell with a sump facing the rear
that way all fuel is forced to the rear of the tank pushing it into the line allowing the pump to ample fuel for powering your vehical
but again with the cell you'd have to convert to a return due to pump not matching the car's voltage/pressure of stock pump
the venom matchs the stock voltage and pressure but increases flow
by 10% so you get fuel to the injectors faster and at the same pressure
[img]images/icons/grin.gif[/img]

[jptech2004]

wow, there is a lot of good info in this thread. i never new that fuel systems were so complex.

[schnack]

Apparently i'm confused: The canister around the fuel pump, does it retrieve and hold fuel constantly, or does it retrieve fuel only when needed? Can someone draw a section view of the fuel pump/canister? I'm a 3-D guy, and am failing to understand the way the system works. WHY can't the stock canister be removed completely? Specifically, how can the stock sys. be improved. List the steps 1,2,3....thanks

[atomics20]

Simple question.... whats the best fuel pump i can get to replace this ford garbage thats failing to deliver fuel on turns..

[1turbofocus]

i will be working on this in about 3 to 4 weeks i all ready have a return system and i also have the less than half tank issues

i am changing the pump and lines i will let you know what i use and what works the best if you can wait till than

tom

[drake]

thank you tom yu ar the man around here!!!!!

[schnack]

Great, I hope answers are coming soon....but right now I'm going to run to the auto parts store to buy a new fuel filter....check out the thread by nilo....that can't be good. I had my fuel changed at the 30K checkup. I t's been 15k since then, maybe time to change!

[CableSrv]

ok it's kinda hard to explain how the canister looks without actually looking at it yourself
however i'll try to describe it

it's a round canister
at the top is a outlet and a place to hold a one way valve (so fuel doesn't dribble back into your tank at night and you still have pressure)
inside the canister lies your pump since it's an intank pump
on the top of the pump is a rubber seal and the out let that connects to the top of the canister
on the bottom of the pump is a rubber stand and a screener that sits on the bottom of the canister
next to the pump (INSIDE the canister) is a oddly made one way valve
more along like a cross with a rubber circular disk underneath it and the cross holds it down
under that is another pre screener
as the pump sucks
is creates a small ammount of vacum in the canister
due to that that circular disk rises and alows fuel to flow into the canister but won't let fuel out
so if you fill up the canister on it's own it won't drain!!!
the only issue i can see is that hole for the 1 way valve on the bottom of the canister is maybe 1/4 big maybe smaller can't quite remember
but again IT'S SMALL AS HELLL!!!!
i do believe cuting that cross on top of the rubber part off and taking the rubber circular thing out and making the hole down there bigger and replacing the rubber circular thing with a larger one
and using epoxy to recreate a new cross to hold down the rubber circular part you can enlarge the ammount of fuel that can flow back into the canister
ford make a mistake designing that canister
however they designed it in spec to the pump
any pump better will show the design flaw of the canister as it's to much and will cause starvation on hard cornering and under 1/4 of a tank
unless someone redesigns the canister or finds a way to completely remove it your kinda in the same boat i'm in [img]images/icons/frown.gif[/img]
hell soon i'm about to run into fuel issues beyond what my injectors can handle [img]images/icons/frown.gif[/img]
seeing as they can only handle i think 170 ?
and the maf can only sustain 150 i think due to the 5v ? issue
i have no clue what i'm running
i just know my car runs good as long as i'm within 1/2 tank or more!!

[CableSrv]

that's kinda what i mean by the cross that holds down the circular rubber peice for the 1 way valve

[CableSrv]

I hope this help some!!

[CableSrv]

i hate to bring this back up but i found a semi descent picture of our fuel canister