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    Author Topic: fuel pump outlet adapter size?  (Read 1127 times)

    Offline Cudaah

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    fuel pump outlet adapter size?
    « on: May 19, 2008 - 07:37:57 PM »
    Does anyone know what the thread sizes are for the fuel outlet for the stock fuel pump?  I bought a 1/4" to 6AN aluminum adapter from summit and it barely turns a quarter turn.  Not sure if this might be metric or not.  Just don't wanna strip anything out.

    Thanks
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    Offline Bullitt-

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    Re: fuel pump outlet adapter size?
    « Reply #1 on: May 19, 2008 - 07:50:51 PM »
    Depends, I got this info from NAPA webstore
    340 pump Fitting Size(s):5/16"; 1/2"-20 UNF-2B
    440 pump Fitting Size(s):5/16"; 5/16"
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    Wade  73 Rallye 340..'77 Millennium Falcon...13 R/T Classic   Huntsville, AL
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    kudakidd

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    Re: fuel pump outlet adapter size?
    « Reply #2 on: May 20, 2008 - 12:25:11 PM »
    it's a 1/4 NPT. make sure your is a pipe thread
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    Offline ntstlgl1970

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    Re: fuel pump outlet adapter size?
    « Reply #3 on: May 20, 2008 - 02:25:25 PM »
    Quote from: bullitt99 on May 19, 2008 - 07:50:51 PM
    Depends, I got this info from NAPA webstore
    340 pump Fitting Size(s):5/16"; 1/2"-20 UNF-2B
    440 pump Fitting Size(s):5/16"; 5/16"

     :iagree:
    look in the outlet hole, is there a tube seat in there or an empty hole? tube seat= straight thread/steel tube fitting (think brake lines) and empty hole is usually pipe thread.
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    70 Cuda, 7.0L Gen-III Hemi, Viper T56 w/9310 gearset, 3.91's, Megasquirt MS3x v3.57, Innovate wideband, Firm Feel upper arms, torsion bars, springs and strut rods, QA1 DA shocks. I did everything on this car except the fancy paint stuff and I drive it...and I can't seem to stop messing with it....
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