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HO VP44 or SO?

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I thought I had it all figured out, I called DAP today and they told me the opposite of what I thought I knew. Is the only way to find the correct pump that I need, to pull the old one?

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  • KATOOM
    KATOOM

    The 1999 SO trucks came with the optional 5600, and the tranny came with the smaller 1 1/4" input shaft like the 4500.  To be sure if you have the SO or the HO, you can confirm with the VIN.  If the 8

  • dripley
    dripley

    I was not trying to muddy the water though it seems I accomplished that. With the cost of the pumps and cores, just did not want to see someone get stuck.

  • Me78569
    Me78569

    look at the tag on your motor, is it a 245 ho or a 235 so?  I know some early 6 speed trucks were SO's still.       re

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36 minutes ago, dripley said:

The thing that bugs me is every where I looked you have to return the same pump for a core that you buy. So if I wanted to put an SO on mine i would have to find an SO to return. Always thought that was a little strange. 

The SO and HO VP's are identical except for a couple differences.  The PSG which is removed anyways (or should be), and the plungers and fuel cam.  Other than that, there is no way to tell the difference between the two unless you knew what you were looking for.  So a core is a core..... :thumbup2:

    •
    • Like 1

    My 02 HO truck runs perfectly fine with the SO pump i had put on. With edge JWA power setting on stock you wouldn't know it wasn't a HO pump on there unless i told you.

    • Like 1

    Either pump can be used on either engine.  No running issues.

    I understand the differences are minor between the HO and the SO. But my point was to order an SO pump for my truck the vendors will not accept my HO pump for a full core. They knock 50% off the core value. Please scroll down to "Core" near the bottom of the page. This is DAP but i have seen it on other sites as well and i seem to remember some that would not accept a different core period. Not sure of that one though.

     

    http://dieselautopower.com/bosch-027-vp44-fuel-injection-pump-standard-output-235hp-wire-tap-voids-2-year-warranty-vp44027/

    Then I wouldn't be ordering from DAP.  Thats ridiculous.....

    • Owner

    Gott pay closer attention...

    Midwest Injection is the tight one...

    Now Industrial Injection is a different story... Notice no core issues...\

    http://dieselautopower.com/industrial-injection-standard-output-vp44-235hp-0-470-506-027/

    Again you get what you pay for. You want cheap expect cheap.

    Edited by Mopar1973Man

    • Like 1
    7 minutes ago, Mopar1973Man said:

    Gott pay closer attention...

    Midwest Injection is the tight one...

    Now Industrial Injection is a different story... Notice no core issues...\

    http://dieselautopower.com/industrial-injection-standard-output-vp44-235hp-0-470-506-027/

    Again you get what you pay for. You want cheap expect cheap.

    I dont see any core policy on that one.

    2 minutes ago, Mopar1973Man said:

    Dang you Dave your going to make me go out and hunt this all down... :punish:

    Not trying to make you do that. I just remember seeing alot of that when I bought mine many years ago. I looked on Blue chips site and dont see it there. Not much about a core other than it has to be returned within 30 days. But i am betting that DAP and Vulcan are not the only ones.

    Another reason i shopped for a good used reman So pump. As everywhere i looked required you turn in same pump as your buying and i wanted an SO. All i had was my Ho core.

    Edited by moparguy55

    If I had a HO and was looking to put a SO on, I'd find a core from someone who did a Ppump swap. Plenty out there :thumbup2: 

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