Extra fuel pump

I'm attaching an extra fuel pump after the SU pump on my 1971 B.

The Carter pump I'm using has a metal can fuel filter in line before the fuel pump itself.

I'd be happier in the installation without the fuel filter. I intend to install a fuel filter under the bonnet as was in place beforehand.

Leaving the fuel filter in place causes a longer loop of fuel line than I like.

Do you think I can get away with deleting the fuel filter?

Ron

Personally, I like a filter before the carburetors. But I guess it makes more sense to have filter before fuel enters the pump. I not in favor of an extra fuel pump as it is not needed but its your car do what you want.

James

I have a filter installed just before the S.U. pump, and I have not had any issues. You should be good to go, but that is just my $.02

I am running the carter pump on my '79 as your illustration shows. It is the primary pump. I just got tired of constantly having to fool with the stock pump setup.

Filter before pump!
http://homepages.donobi.net/sufuelpumps/Fuel_Pumps/SU_Fuel_Pumps_Facts_and_Myths.pdf

Back-up pump!
http://homepages.donobi.net/sufuelpumps/Fuel_Pumps/Back_up_Fuel_Pump.pdf

RS

Thanks, Robert. I have reread Dave's articles.

I could rework my fuel pump setup to put the steel can fuel filter before both pumps. I have already put in a ball valve as suggested by Dave.

That way I reduce the last long run of fuel line.

Tank -> ball valve -> filter -> SU pump -> Carter pump -> pipe to front.

I have also had suggestions to put the pumps in a parallel configuration rather than in series. I think I'll stay with the series configuration to make the switch from one pump to the alternate easier for another driver (read my wife) that wouldn't want to crawl underneath the car to effect a necessary change.

Rocks and small birds. That made me laugh. Thanks.

Ron - If you plumb the pumps in parallel, you can safely have the filter in the line for the Carter (as required), but not in the line for the SU pump (should not have a filter in front of a SU pump). All that is required to plumb the two pumps in parallel is two 'T' fittings. Both pumps have check valves in them, so fuel will not pump back through the unused pump.
Cheers,

do all electric fuel pumps have check valves in them?

I guess I'm in line for the dumb ass luck award. I put a Facet pump in series with the SU and both are working fine. The Facet pump recommended a fuel filter upstream from the pump. I now have a fuel filter coming out of the tank and another before going into the carburetors. Am I headed for a problem? I use the SU all the time.

certain fuel pumps can burn out if an incoming filter gets plugged

Ben - See the article, SU Fuel Pumps, Facts and Myths in the SU Fuel Pump Articles section of my web site, linked in my signature block below.
Cheers,

Dave - Thanks for the memory jog. I read and used your article when I added the second pump. I knew that article was somewhere in my data bank. So I added the second fuel filter coming out of the tank because I was concerned about possible dirt in the tank and secondly the performance of my SU. Consequently, I added the second Facet pump. My engine had been cutting out and acting like it was low on fuel. Turned out the problem was sticking valve guides. The machinist 15 years in the past had machined the guides with insufficient clearance. When the engine heated up, the valves (or valve) stuck and the car would miss. I kept looking for an easy fix. Thanks so much for that article it was a huge help.