Fuel pressure advice

[Paul999]

Hi

I've just fitted a new Facet fuel pump to my FIA Mini to replace the knackered SU pump. Does anyone have any suggestions as to whether a fuel pressure regulator will be required, and if so what pressure to run?

The engine is a full race 1293 on twin HS4's and the flow rate of the pump is 6-8 psi/40 gallons per hour.

Thanks in advance!

Paul

[Red Mist]

A regulator is definitely a good idea. Normally a fuel pressure of 3-4psi is best.

[Paul999]

Thank you; I shall pick one up this weekend.

Cheers, Paul

[Spider]

The Facets are a good pump, but their 'off the shelf' ones, as Red Mist has already said have pressures that are too high for SUs, unless a regulator is also used.

I've used a number of these;-

http://minispares.com/product/Classic/F ... o%20search

and I gotta say, I'm very impressed.

[ianh1968]

Would I be correct in saying that SU's are supposed to be fed at about 2.5PSI,
but many people run them higher because they don't know the difference between
capacity and pressure?

Ian

[Paul999]

Thanks guys. I used the Facet as I had a spare for a Crossle sports racer on the shelf. I thought it might be a bit powerful as the Mini has a few less bhp!

I shall pick up a couple of the recommended pumps.