Fuel Pump Rebuild or Replacement options for 512BB | FerrariChat
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Fuel Pump Rebuild or Replacement options for 512BB

Discussion in 'Boxers/TR/M' started by samsaprunoff, Jul 30, 2007.

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  1. samsaprunoff

    samsaprunoff F1 Rookie
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    Sam Saprunoff
    #1 samsaprunoff, Jul 30, 2007
    Good evening Everyone,

    This is a cross post to a thread I placed in the Technical section...

    I was curious as to what others are doing in regards to dealing with cranky electric fuel pumps on their (carbed) BBs ? I ask, because the original pumps are NLA and have been superceded to what looks like an aftermarket pump. Ferrari's part number of this new pump is 100245 (110 GBP) and some investigation reveals this to be a Facet 476087 ($80 USD) fuel pump (I am 99% sure). The Facet pump is similar to the original, but is different with regards to the inlet and outlet port positions (not really a big deal). Is it possible to rebuild the original pumps and if so, where does one obtain a rebuild kit. I am only considering the rebuild, as I would like to maintain the use of the original components if possible.

    What have others done? Any thoughts?

    Cheers,

    Sam
     
  2. fastradio

    fastradio F1 Rookie
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    David Feinberg
    #2 fastradio, Jul 31, 2007
    Sam,

    Although the pumps in my BB are original and still good...I suspect that they're nearing the end of their useful lives as it takes longer than I recall to fill the bowls, prior to starting. Interestingly enough, pressure and volume tests indicate that they're still performing to "specs". The best that I can recall, I've never seen rebuild parts for the Corona pumps...

    In terms of replacements, there are many options. I've done many Weber conversions on multiple brands and typically will use the Facet-brand pumps in parallel. Not the quietest of the bunch, but consistently deliver the pressures and volume I usually need for the application. I had forgotten all about the Pierburg pumps that were commonplace on the carbed 911s. A great pump and quiet. I suspect that when my pumps fail, that will be the path that I take.


    Regards,
    David
     
  3. samsaprunoff

    samsaprunoff F1 Rookie
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    #3 samsaprunoff, Jul 31, 2007
    Good day David,

    Thanks for the response! In my case, my pump(s) are starting to have erratic (low) pressure that progressively degrades the longer the pump is on. Consequently, I want to replace the pumps.

    I did not think that there was a rebuild kit available, but I did see a reference to it when I did a search on here. As for my options, it is good to know that I have choices. Given your insight and experience with the BB's carbs, what pressures and flow rates should I be looking at? I have been using the Facel cross as a reference, but I was unsure as to what other parameters I should be looking at. As for your direction, do you have a model number of the pump that you would consider?

    Someone in my cross post thread in the Technical Section, stated that they used a Carter Fuel pump as a replacement. I did take a look at the Carter pumps and did find something that would work, but has a slightly different orientation which would not look OEMish. Surprisingly, Holley actually makes a pump that looks like more OEM like and has better flow rates...

    Thanks in advance!

    Cheers,

    Sam
     
  4. fastradio

    fastradio F1 Rookie
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    #4 fastradio, Jul 31, 2007
    Hi Sam,

    First the specs that I like to see on a BB:
    Fuel pressure between 3.5 and 4.5 psi
    Volume between 30 and 60 gallons an hour

    I am very familiar with the Carter pump, as I just installed one my BMW 2002 that I'm restoring. This is a mildly prepared, dual Weber 40 DCOM engine. The pump is physically a bit large, but I have the space. With this car, originality is not a great concern. The Carter pump is certainly a viable alternative...

    Most of the work I have done in the past was on very high output Alfa Romeo engines. My” normal” set-up was dual, parallel Bendix "red-top" pumps. A tad noisy, but they always, reliably did the job. The beauty of parallel pumps is if one fails, you still can drive home.

    As for the Pierburg pumps, here's a link to a suitable replacement:

    http://www.allzim.com/acatalog/Pierburg_Low_Pressure_Fuel_Pump.html

    I think a pair of these would be the "hot" set-up!

    The best that I can remember, Bosch never made a low-pressure fuel pump for carb applications. I'm not familiar with the Holley pumps...Sorry.

    Regards,
    David
     
  5. LightGuy

    LightGuy Four Time F1 World Champ
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    David
    #5 LightGuy, Jul 31, 2007
    There has to be dozens of fuel pumps that will work. This may seem low tech but check the hot rod catalogs such as Summit.
    The fuel doesnt know if its pumped by a fine crafted Italian pump or an Accel ;)
     
  6. samsaprunoff

    samsaprunoff F1 Rookie
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    #6 samsaprunoff, Jul 31, 2007

    Good day David,

    Thanks for specs and the info! I will take a look at the pump you indicated!

    Cheers,

    Sam
     
  7. samsaprunoff

    samsaprunoff F1 Rookie
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    #7 samsaprunoff, Jul 31, 2007
    Good day David (from Texas),

    You are absolutely correct! However, some of the Hot Rod fuel pumps have:

    1. Too much pressure, which will overcome the Weber's (float) Fuel shut off valve
    2. some require the use of a fuel pressure regulator... which means more parts, etc
    3. different physical mounting requirements... which means mucking around with brackets and fuel lines and in the end may not look that pretty.

    Lastly, some of these aftermarket pumps may look dramatically different (but operate totally fine) than the OEM and so might look out of place... for those that are interested in maintaining an OEM look anyway (I am in this category).

    Cheers,

    Sam
     
  8. samsaprunoff

    samsaprunoff F1 Rookie
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    #8 samsaprunoff, Aug 1, 2007
    Good day David,

    You are in good company when you mention that you like the Pierburg pumps, as Russ (snj5) stated:

    Given that yourself and other heavy-weights have recommended the Pierburg pumps, I decided to go with dual Pierburg pumps. In Canada, I was able to find the pumps locally for $119 CAN each, however, one can find them for about $100 CAN from an online Canadian dealer:

    http://parts.autopartsonlinecanada.com/parts/apocanada/quote.jsp?year=1969&product=E3000-63097&application=000343210&part=Fuel%20Pump&category=E

    The link you provided for the pumps is actually a better deal, but given the the transit time, and the transport and importation costs I decided to spend a little more and get them today... which means I can drive my car (and keep testing my fuse blocks) later today or tomorrow.

    Thanks again for all your and everyone else's help and insight!

    Cheers,

    Sam
     

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