Facet Fuel Pump

[new2 7s]

I'm running Weber Carbs on my car and I just installed a Facet 4 - 5 1/2 psi fuel pump after removing the intank high pressure pump. I mounted the pump on the outside surface of the rear firewall (behind the passenger side seat).... does the pump need to be primed or will it pull fuel through the new pick in the tank without priming the fuel line and pump?

[blami]

The answer to your questions is "I'm not really sure"-- BUT I have the same pump as you, mounted in the same general area, running Weber 45's, and I have never needed to prime the fuel line and pump--your situation is different from mine however--I never had another pump--my car was set up to run these carbs from day one.   I'll bet that you will be OK if you simply put gas in the tank, let the pump work for 8 to 10 seconds, pump the throttle 2 or 3 times, then hit the ignition switch.

 

 

 

Bart, 93 caterham hpc

[new2 7s]

Thanks, I just started up the motor and it worked without priming the pump.

 

Are you running a Crossflow or Zetec motor?

[Al N.]

I'm pretty sure that Bart's track-only car is running a non-US spec Vauxhall engine.

[blami]

Hello,

 

 

 

Al is correct, I have the 2.0 Vauxhall engine, set up by Swindon Racing, running 45 DCOE carbs. I speced this engine out when I ordered my kit in 1993.

 

 

 

The fuel pump has worked flawlessly but there is one thing that you should check: Do you have a fuel filter somewhere between the pump and carbs?

 

 

 

My car did not have any type of inline fuel filter--the Weber carbs do have an internal screen type filter but it's very small and could become restricted easly---so, do yourself a favor and install an inline filter.

 

 

 

Bart

[new2 7s]

Bart,

 

 

 

Yes, I have a fuel filter from Earls mounted before the carbs near the motor and a pressure regulator to keep the volumn pressure at 3 - 4 psi since the instructions that came with the pump show the pressure output at 4 - 5 1/2 psi.

 

Do you run a pressure regulator? or do the DCOE 45's take higher pressure then the 40's?

 

I've been trying to sinc up the carbs myself but think I need to take the car to a professional tuner because my idle speed is about 1100 - 1400 rpm, most of the time it's at the higher end.

 

 

[blami]

Hello again,

 

 

 

I've never used a pressure regulator and it has not been a problem for me (knock on wood, etc).

 

 

 

My car will idle at 900-1000 rpms, quite reasonable for a track-type engine tuned to produce over 200 hp.

 

 

 

Before you try to set the idle be sure to balanced the air flow through the 2 carbs (4 throats). I have found that a tool called the "SynchroMeter" Flow Meter works well. It's made in Germany and a lot of the guys with older Porches running carbs use this. Good for use on Webers, Solex, SU, Stromberg, etc.

 

 

 

General procedure: Bring engine and fluid temps up to normal operating conditions. Balance carbs first, then check mixture, reset idle, THEN, check balance again.

 

 

 

I got this right early on (lucky perhaps) and have not had to fiddle with the carbs over the years. I'm at the point where I usually just check the balance each spring.

 

 

 

I've only made a few adjustments to the jets as I've played around with different exhaust configurations (competition muffler, carbon fiber muffler, straight pipe, straight pipe with SuperTrapp Diffuser Discs)

 

 

 

I suspect much of the credit for the reliability of my engine goes to Swindon Racing who set everything up well to begin with.

 

 

 

Bart