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Fuel pump comparison

Discussion in 'Technical Q&A' started by snj5, Jan 1, 2006.

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  1. snj5

    snj5 F1 World Champ

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    #1 snj5, Jan 1, 2006
    Last edited by a moderator: Sep 7, 2017
    In my experiance, I've tried several different fuel pumps. I tried to find an original Corona, but now unavailable - even Ferrari lists the Facet as replacement.

    Here is a rearely seen rogue's gallery of several low pressure pumps I have used on my carburreted v-8 Ferrari
    Left to right:

    Carter P60504 'gerotor' pump: 3.5 lbs, 20 gallons an hour approx, although you will see many numbers from 12 - 30 quoted; widely available from Napa, Advance auto, etc; typically $56; Very quiet. Would probably be best for 200 hp and under, as pretty small to keep up although advertised to do so.

    Carter 4070 rotory pump: 75 gal/hr at 4-5 lbs, widely favored by high hp Weber conversions. VERY LOUD, and comes with hanging anti-vibration mounting; does not need regulator; also widely available at about $90 Did I mention it's VERY LOUD?

    Holley 'Red' Pump 5-7 pounds, lots o' gallons per hour, definitely needs regulator; widely available, LOUD. I personally had trouble with this pump and Holley regulator holding flow and pressure stable; about $100 - $120

    Facet 476087 - 4-5 lbs at 18 - 30 gal/hr; the Ferrari recommended replacement pump for every carb'd car I could look up. Is an interruptor type like the original Bendix of old, and even carries the same part number. With the #476087e, it is the uprated 'Gold-Flo' model that is electronic and does away with points. Not too loud, but need to mount on rubber mount or rubber washers to isolate. This produces the famous clicking or muted thumping sound you hear on so many race and older carb cars; cannot be heard over engine (the Holley and Carter 4070 can). About $90 typically

    On a fun note you can tell by the colors and decal it is a Facet pump represented on the highly detailed CMC 1/18th scale 250 SWB.

    I decided to go with the Facet, seen here in vivo:

    Although this is cross posted in content from a vintage thread, I thought there might be interest.
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  2. 308ROB

    308ROB Formula Junior
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    #2 308ROB, Jan 2, 2006
    snj5, Happy New Year,
    thank You for your very clear information it's very useful thanks.Rob
     
  3. M.James

    M.James F1 Rookie

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    #3 M.James, Jan 2, 2006
    Okay, I'll bite - how much difference is there between fuel flow in a QV 308 compared to a carb car? Would the same fuel pump selection for a carb car work in a QV?
     
  4. Birdman

    Birdman F1 Veteran

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    #4 Birdman, Jan 2, 2006
    Absolutely not. The carb cars need a low pressure pump, the injected cars need a high pressure pump.

    Birdman
     
  5. greg328

    greg328 F1 Rookie

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    #5 greg328, Aug 2, 2006
    I just ordered a Facet 7 psi fuel pump for my carb 77 308. (Superformance)

    Do I need to cancel that order? Too much psi for a carb car?

    What is stock pressure? 4psi? Will added pressure help cure fuel starvation during hard cornering? Or is that gravity acting on the bowls--no fix possible?

    Inquiring minds want to know!

    Thanks,
    Greg
     
  6. Peter

    Peter F1 Veteran
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    #6 Peter, Aug 2, 2006
    Read the comments above. You'll need a regulator to bring it down to 5 psi.

    Which brand & model of pump did you buy?
     
  7. greg328

    greg328 F1 Rookie

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    #7 greg328, Aug 3, 2006
    Peter,
    It's the Facet 7 psi model sold on the Superformance website. No model given, but it's advertised on the 308 carb-fuel page. I wonder if it's designed for fuel-injected cars? The page doesn't specify...

    Spasso said on a different thread that 7 psi is OK for carb cars......

    My OEM pump works fine, I'm just hoping to solve some of my fuel starvation issues. Not even sure if more fuel psi will do that...

    Greg
     
  8. miketuason

    miketuason F1 World Champ
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    #8 miketuason, Aug 3, 2006
    Fuel starvation is usually cause by incorrect float level adjustment.
    And if the preassure is somewhat high, you can always add a
    Fuel preasure Regulator.
     
  9. don_xvi

    don_xvi F1 Rookie

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    #9 don_xvi, Aug 3, 2006
    Bumping up the fuel pressure won't help the infamous carb 308 fuel starvation on corners. Go ahead and cancel your order.
     
  10. snj5

    snj5 F1 World Champ

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    #10 snj5, Aug 3, 2006
    The Facet pump is the one specified by Ferrari as THE replacement pump for the Corona. It is to be used without a regulator.
    Mine has worked fine for years supporting nearly 300 hp.
     
  11. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #11 Steve Magnusson, Aug 3, 2006
    It's a minor point that you guys are arguing. The 7 psi pump might accelerate the needle valve seat wear a little, but if you can't get the 5 psi pump easily that makes using the 7 psi pump seem a reasonable decision IMO (and the complexity of adding a regulator out in the field is something that a manufacturer might choose to avoid risk-wise in their recommendation).

    The K/KE-Jet fuel pumps are in the 70~80 psi (5 bar) ballpark so that's a completely different animal.
     
  12. greg328

    greg328 F1 Rookie

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    #12 greg328, Aug 3, 2006
    So, if my OEM fuel pump is working fine, which it is, there's no sense in changing it out?

    No benefit to the added pressure?

    Thanks,
    Greg
     
  13. bernardo66

    bernardo66 The Crazy Cat Man
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    #13 bernardo66, Nov 13, 2006
  14. snj5

    snj5 F1 World Champ

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    #14 snj5, Nov 13, 2006
  15. bernardo66

    bernardo66 The Crazy Cat Man
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    #15 bernardo66, Nov 13, 2006
    Thanks Russ!!
     
  16. snj5

    snj5 F1 World Champ

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    #16 snj5, Nov 14, 2006
    Last edited by a moderator: Sep 7, 2017
    So we do not confuse folks into thinking it is the small square one, here it is; it is the 'official' replacement pump listed in the Ferrari parts manuals - does NOT need a regulator. This used to be called a 'Bendix' type pump used on aircraft and racing cars. See last picture in Post #1.
    best
    russ
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  17. bernardo66

    bernardo66 The Crazy Cat Man
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    #17 bernardo66, Dec 4, 2006
    Installed it a week ago....works like a charm!!!!! :D:D:D:D:D

    Thanks once more!! ...and it's quieter than the original unit I had.
     

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