HO VP44 or SO?

[Mopar1973Man]

Differences is the HO is high pressure, lower volume. SO is higher volume with lower pressure. So there is a difference in internal parts in the pump. This is where some of BlueChip's special X and hotrod pumps come from is mixing and match parts from both pumps. 

[KATOOM]

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.....

[moparguy55]

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.

[Me78569]

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

[dripley]

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/

[KATOOM]

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

[Mopar1973Man]

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 February 26, 2016 by Mopar1973Man

[dripley]

Vulcan is the same way except you get no credit. 

 

http://www.vulcanperformance.com/Bosch-VP44-p/vp44.htm

[Mopar1973Man]

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

[dripley]

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... 

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.

[moparguy55]

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 February 29, 2016 by moparguy55

[TFaoro]

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