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1969 Giulia GT Junior, with 2 litre conversion
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49 Posts
Discussion Starter · #1 ·
Do folks have a recommendation for which specific Facet fuel pump to use when switching from a mechanical pump to an electric pump?

Even if my target fuel pressure is 2.75-3psi, Is it better to get a pump delivering 4-5.5psi and regulate this down to mytarget pressure, or rely upon the output of Facet's "Black top" pump which delivers 2.75-4psi and then regulate this down to my target pressure?

I'm using 40 DCOE 28s with a 2.0 N&S and are now fitted with profiled 32mm venturis. The engine is a modified 2 litre Nord running RJ's cams. (Carb internals spec: MJ 130, AC 180, E tube F16, Idle Jet 50F8).

How much fuel flow (discrete from pressure) should I be aiming for to ensure my float bowls remain full at high revs? I noticed that the Black top flows 34 gallons per hour, whilst the pumps delivering more pressure are also able to flow more volume (e.g. Red Top: pressure 6.5-8psi, volume up to 45 gph)

Thanks in advance
 

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Richard Jemison
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8,325 Posts
Fuel flow is nothing you have to think about with these engines. At wide open throttle how much fuel are you going to use.....
 

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Registered
1969 Giulia GT Junior, with 2 litre conversion
Joined
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49 Posts
Discussion Starter · #3 ·
Fuel flow is nothing you have to think about with these engines. At wide open throttle how much fuel are you going to use.....
Thanks Richard - that's the fuel flow question answered.

Is it better practice to have the FPR regulate pressure down from a higher pressure to the target fuel pressure or to source a pump which will supply fuel more in line with the target pressure?
 

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Premium Member
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15,013 Posts
You should use a pressure regulator with any fuel pump that is feeding Webers. You cannot go wrong with a Filter King. Get one with a gauge and set it to 3 psi.
 
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