This is getting old

[ISX]

I started running into contradictions with max pressures of the vp44 and p7100. So here we have it:

http://www.dieselpowermag.com/tech/dodge/1009dp_cummins_injection_system_spotters_guide/

[*]P7100--15,225 PSI

[*]VP44--15,950 PSI

http://www.dieselram.com/archive/index.php?t-162748.html (last post)

[*]P7100--18,853.6 PSI

[*]VP44--26,105.4 PSI

http://forum.mopar1973man.com/threads/6104-Timing-a-VP44-Quest-for-MPGs (in quotes)

[*]P7100-->14,500 PSI

[*]VP44--14,500 PSI

http://forum.mopar1973man.com/threads/635-no-power?p=4025#post4025 (post #9)

[*]VP44--17,400 PSI

:banghead::banghead::banghead:

[ISX]

Have the same issue with compression ratios for ppump 12 valves.

http://www.cumminsdieselspecs.com/12v.html

[*]17:1

Quickserve

[*]17.9(or 18 on other sheets):1

http://dodgeram.org/tech/dsl/Facts/96specs.html

[*]17.5:1

The VP44 SO's all say 16.3 for the most part but Quickserve shows them as 16.5.

[stodg73]

What about the H.O. ratio of 17:1?

[ISX]

Not much discrepancy with that. Seems the more common things (SO, all the 12 valves) get grapevined like crazy. Most of those things are from very reputable sources, and they are all completely different.

[ISX]

Bosch book I got out of the college library says P7100 is 12,328 PSI, which is of course different from everything listed above. Says the VP44 is 28,282 PSI. CP3 is 23,206 PSI and apparently they make an oil lubricated one called the CP3.4 "used in only heavy duty trucks"

[War Eagle]

I was expecting the CR version to generate the most pressure. :think:But I guess we still don't know fact from fiction yet, do we?

[ISX]

I'm going to say this last round with the bosch book is the correct figures. It is extremely detailed so I'm sure it will explain why. Also found out the VP44 has a 40* timing range and even has an optional pre injection like the CR's. Not sure if it's enabled on the dodges or not but says it's an option.

[ISX]

Alright got anotherrr bosch book which included a chart of every injection pump they made and the 12000psi of the p7100 just said p series which includes smaller pumps so according to everything in the books that specifically mention it, its 17,400psi. The VP44 is 21,755psi, the higher pressure one I mentioned before was a passenger car one rated for 4500RPM.

[Mopar1973Man]

Could you Make a article of the correct information that you do find. (Please! ) Or maybe just post all your findings as a article and the sources.

[ISX]

I got wayyyyyyyyyy more information than just that hahaha. I gotta read through the other 1000 pages.