got a walbro 255 external fuel pump.

which fuel filter should i go for? 100, 40, 10 microns?

 

Depends what the rest of thE fuel system looks like. Generally people will run stock fuel filter on a street car up to about 500hp. Where is your pump mounted? What else have you done to the fuel system? Changed any lines? Give more info please

 

my eg had a carb engine so i cant use the stock lines at all.

the walbro will be mounted near the gas tank using a -6 lines all the way to the fuel rail with 1000cc's

 

Ok well in that case ou want a 10 micron before the pump and a 100 micron before the rail after the pump

 

1-if i switched what you said, 100 micron before the pump and 10 micron before the fuel rail, would it matter?

2-if i got 100micron+ a 35 or 40 micron will be bad?..cause price of the 35 micron is half the price of a 10 micron filter.

 

Sorry it's Ben a while the 100 micron goes before the pump that filters out larger particals which keeps from the pump being damaged and then the 10 micron goes after the pump to keep smaller particals out of the injectors and no you need to run a 10 micron not a 40 because it's ensuring particals don't clog injectors or stuff getting into combustion chambers

 

lol its alright bro...thanks alot for your help!!