just run one between your tank, and your pump to protect your pump from any crap in the tank
Is it a given that you MUST have a filter either side of the fuel pump?
Why would you run one either side?
just run one between your tank, and your pump to protect your pump from any crap in the tank
I only fit one before the pump as the carb has its own very fine one above the float needle
fine mesh one before and a high pressure injection filter after
I've got three filters in my system:
1 before the low pressure pump
1 in the low pressure pump, and
1 before the fuel rail after the high pressure pump
Aaargh... why can't we all sing from the same hymn sheet! 
I have an injection tank (integral collector, so no swirl pot, so just one high-pressure pump required), so was just thinking of having a fine mesh
one pre-pump!
Surely that would weed out all the crap?
my system is carbed and will have the following:
tank > inline mesh filter > pump > filter king pressureregulator/fuel filter > carbs
If you're running a low pressure and high pressure pump (ie an injection system) it makes sense to have a two, one before each pump. Note that low pressure filters won't work as high-pressure filters, they'll blow out or not filter properly... You don't need two for each pump.
Just a single high pressure pump for me.
Just a single high pressure filter for you then.
Hoorah... cheers!
With high presure injection system you want...
A. One on the low presure side to filter out any debris from the tank (tin-tops have a mesh on the pick up in the tank) before it gets to the pump.
I've got a clear plastic one in the line that, now its picked out most of the stuff that was initialy in the tank, will be replaced with a glass
and mesh one next time I'm able to.
B. One high pressure micro filter after the pump (don't know why after the pump but thats the way all the manufacturers do it, though I suspect
they don't flow well on the suction side).
adrian
It would be ok unless the pump decided to wear and deposit fileings into the injectors.Most tin tops seem to have a coarse filter in the tank and a
replaceable filter after the pump.I have a LP pump with built in filter, swirl pot and then the HP pump followed by a fine filter from an injected
car.
Paul.
quote:
Originally posted by scootz
Aaargh... why can't we all sing from the same hymn sheet!
I have an injection tank (integral collector, so no swirl pot, so just one high-pressure pump required), so was just thinking of having a fine mesh one pre-pump!
Surely that would weed out all the crap?
My set up has the "in tank" HP pump, (as Ford injection), this has a fine mesh filter on it. External to the tank I have the ford HP filter, and all seem to opperate just fine. Cheers Ray
quote:
B. One high pressure micro filter after the pump (don't know why after the pump but thats the way all the manufacturers do it, though I suspect they don't flow well on the suction side).
adrian
quote:
Originally posted by Daimo_45
quote:
B. One high pressure micro filter after the pump (don't know why after the pump but thats the way all the manufacturers do it, though I suspect they don't flow well on the suction side).
adrian
If it's injection, make sure you have one near your injector rail, if the pump goes bang, then the debris doesn't get to your fuel rail, same for deteriorating fuel lines (thats why it needs to be as close as possible to the fuel rail)
So there is more chance the pump will break for the stealerships to replace it.
I've used a low pressure filter on the outlet of my swirl pot (inlet to high pressure pump)...So far no problems.
I though long and hard about it, and could not really think of a good reason for a high pressure filter...Unless the higher pressure pump starts to
break up...
As I am now going down the duratec/EFI route I thought I might hijack this thread.
I'm thinking:
tank > inline filter > high pressure fuel pump > Engine.
tell me what I've got wrong, because I'm sure there's something 
.
I also have no idea what a swirl pot is..