filter then pump or ?

[fnoblitt]

how does this look ? this is as close to the tank as i could get the pump. did i get it right ? the filter before the pump,cause i don't want any crap making it through the pump. or any other ideas on routing the electric pump/filter? thanks. this is a great site.i'm learning alot.

[John Fabris]

Looks Ok, pump after the filture is a good idea.

My only concern (due to the angle of the picture) is, do you have enough clearance between the fuel pump/fuel lines and the top of the rear end should you bottom out the rear end? To me it looks like the panhard bar could hit the fuel pump on a hard bottom out...

[glock35ipsc]

Where do you plan on routing the exhaust? Is it dumping before the axle?

[John Fabris]

Oh, good point glock, normal routing of exhaust (when exiting the back) is to go over the rear axle which is awful close the the pump setup...

[fnoblitt]

i eyeballed the pump so that if i did bottom out it would barley clear the end of the panhard bar. and the exhaust will exit out the sides before rear tires.

[John Fabris]

Cool, then you should be good to go!!

[Longhorn Man]

Actually, the filter needs to be after the pump. An electric pump doesn't like to suck, but it'll blow like crazy. If you don't want junk in the pump, start with a clean tank and a sock on the pick up tube.
Look under your new fuel injected late model... the pump is in the tank, and the filter is under the body.

[cdowns]

filter after the pump is the best way

[kwhite4]

Pump then filter

[topnos]

I must say I enjoy all of the insight and information provided on this board. Furthermore, I mean no disrespect in disagreeing with the filter after the pump notion. However, I have to say the filter goes before the pump; and yes, an electric pump does like to suck, otherwise it would never pick up fuel from the tank. The only way an electric pump would not have to "physically" suck would be to mount it submerged in the tank. All of the drag cars, street cars, SCCA club cars, and SCCA Pro Trans Am cars I have had the privilege to work on have had a filter before the pump. The most obvious reason is to prevent any trash or debris from the tank entering the fuel system and causing possible damage.
Attached below: an article from National Dragster and a Tech Support answer from Mallory.
http://www.gnetworks.com/v4files/bar...&FlowNDweb.pdf
http://www.malloryracing.com/AskTech...dID=6&ID=93047

[John Fabris]

I guess I was wrong on the pump/filter thing.... It made sence to me as I have lost two electric pumps due to crude in the lines. I can see that with a completely new tank/lines/pickup setup, you would not have to worry about a filter before the pump. I guess I am too cautious on an old fuel system...

[shifty]

I would honestly put a filter before the pump (help prevent debris in pump), and then an inline fuel filter between the pump and fuel rail and/or carb.

[s95930]

I have filter then pump then another filter just before the carb.

[cdowns]

if you really need to know where the filter should go for that pump why dont you read the instructions that came with it??// i'd have second thoughts about the routing of the rubber fuel line from the tank to the filter , looks like a choice place to have the line chaffe a hole there , also the side by side indirect mounting with the excess 90degree turns coupled with the panhard bar looks to be a future service issue waiting to happen // i'd be running them sidebyside on the framerail with the most arrow straight shot to the final destination for ease of service and optimum flow without the needless restrictions,i'd valso be concerned about any length of rubber line over4inches as a fire hazzard(many sanctioning bodies feel that way2) my final tidbit is i prefer to mount electric pumps with rubber isolation to reduce excessive noise and vibration

[longhorn71]

The new trucks do not even have a filter in them.

[s95930]

The pump I purchased advises to use a filter before the pump.

[kelsfine69]

New vehicals have a pickup sock in the tank to pre-filter, then the pump, the an finer inline filter. What you did is fine lookgs good. I did the same

[Longhorn Man]

topnos... I work on cars and trucks all day long, and with the exception of dodge trucks, which have no filter, I have NEVER seen a stock vehicle with the filter before the pump...esp when you consider that the pump is IN the tank on almost everything (except VW... which even then, the filter is after the pump)
As for the electric pumps not wanting to suck, all electric fuel pumps (talkin OEM stuff here) are located in the tank, or right by it. If you were to read the instructions on any electric pump, they'll say to mount it as close to the tank as possible, and low as possible. This, is so the fuel can syphon out. Once you get the fuel flowing out the fuel line (our trucks is a perfect example) the fuel will freeflow out untill you stop it, or untill the tank is empty.
Now, in a mechanical pump situation, it is a bad idea to put the filter before the pump becouse dropping the pressure can increase the chances of... or aggravate, a vapor lock condition. This is simple science that is ignored by many many people. If you increase the pressure, it increases the boiling point (think radiator cap). The oposite is true too, in denver, water boils below 212 degrees... not much, but none the less. A mtn climber will tell you the same thing. So when you cause a restriction in the fuel line, (filter) you lower the pressure in the line, and decrease the boiling point. With vapor lock being an issue in most performance oriented engines, installing an inline filte before a mechanical pump can be enough to induce boiling fuel.

[eedgell]

I think if you are going to filter before the pump it should be something of a sock type or a course type filter. Then a filter after. The reason is restriction on the suction side of the pump can cause pump cavitation or starving of fuel that can cause needless pump damage. A course pre-filter is the best choice.

eedgell