well i picked up a 90 civic hatch and i'm slowly turning it into weekend/track car. i went to put a walbro intank pump into it and realized the tank and lines were rusted. so instead of getting everything new i just got a fuel cell, aluminum hard lines, msd inline pump, and summit fuel filter. i am running all new hardlines up the to the rail. so my questions are - should it be cell, filter, pump, rail? should i mount the filter about a foot from the cell then the pump about a foot after that? if not, where should they be? do i need the stock filter in its location? i wanted to get rid of it just to make sure it doesnt have rust in it and didnt feel it was necessary since i'll have a filter before it anyway. thanks in advance. Ryan

 

no one? i wanna get it all done tomorrow night

 

I think you'd want the pump first, so it doesn't cavitate if the filter gets plugged up. So... Cell - pump - filter - rail - FPR - return line.

 

but couldnt the pump get clogged? although fuel isnt filtered before it gets to the stock pump. or is there a filter build into the stock pump somewhere?

 

It's more like an inlet screen. I'm not even sure if all years/models have it. You could grab that from your old pump & try to fit it on the pickup in the tank. I suppose the injectors can be more damaged by dirt than the pump.

 

so cell - filter - pump - rail - FPR - return line? or should i do something different?

 

Cell - screen - pump - filter - rail - FPR - return.

That's how the factory setup is laid out. Except my '98 Accord skips the filter. Even on cars that use Walbro pumps OEM. The pump can tolerate a little dirt better than the injectors, but you don't want the pump to cavitate.

 

what does cavitate mean? i always thought that it would be better to get the dirt out before it gets to the pump which would get it out before the injectors also. but i guess whatever this cavitate thing is would make it wrong

 

Cavitating is when the inlet of the pump is sucking vapor instead of liquid. The resistance through the filter can cause the fuel to bubble.

Any pump has a certain inlet pressure that's required. Does your pump have any instructions about how it has to be hooked up? Does it have any specs that say anything like how much NPSH is required? Some pumps can tolerate more suction than others. That's why sometimes there's a pre-pump in the tank to feed the main pump.