Fuel swirl pot location

[100SRV]

I need to relocate the high pressure fuel pump and the swirl pot which supplies it. How much higher than the fuel tank should I locate it? Main concern is that the swirl pot return outlet should be higher than the return port into the tank, is around 50mm OK or should I aim for more?

[100SRV]

Hi Steve,
thank you for concise reply.
There is an LP pump located below the bottom of the tank feeding the swirl pot.
Outlet of swirl pot is 12mm (IIRC) feeding a Bosch 44 type HP pump.

Reason for relocation is heat soak causing restart problems - presently the pot and pump are under bonnet so absorb heat from radiator exhaust and LH manifold. Plan is to relocate to rear adjacent tank and away from heat sources.

many thanks!
100SRV

[100SRV]

Hi V8250,
thanks for the tips!

Fuel pump and swirl pot chassis mounted (within the rails in collision-safe locations) albeit in an unfavourable position. Vapourisation is a new problem resulting from a change to wiring allowing cooling fans to run with engine off thus soaking the fuel components with warm air (fan exhaust swirls in that direction).

Installation exactly as you describe, Facet solid state fast road is my LP pump and (mentioned in earlier post) mounted below bottom of fuel tank. The flow rates of the whole system were analysed and the LP pump can keep up with the HP pump's requirement.

• Fuel pumps have seperate relays - LP via primary ignition relay and HP via 14CUX controlled relay.
• If fuses are blowing you have an electrical problem which requires resolution - this car has covered over 100,000 miles (30,000 on EFi) and the only time a fuse for the fuel pump has blown is when the fuel pump itself has failed.

• Are the fuses adequately rated?
• Are they located in an area with high ambient temperature?

Littelfuse website has an excellent how-to for ATO blade fuse ratings (and other styles), some maths is cheaper than a burnt-out car.

Fabrication time now!