I have seen on this site a couple of times where 17# is the ideal fuel pressure. My pump provides 12-13#. Why is 17# better?

I set all my pumps to 18. The fuel is lubricating and cooling the vp44 so the more fuel you can supply to it the better. The return valve pops at 14psi so if you aren't above that then there isn't excess fuel to cool and lubricate http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/25-fuel-system/88-bosch-vp44-injection-pump-overflow-valve

I set all my pumps to 18. The fuel is lubricating and cooling the vp44 so the more fuel you can supply to it the better. The return valve pops at 14psi so if you aren't above that then there isn't excess fuel to cool and lubricate http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/25-fuel-system/88-bosch-vp44-injection-pump-overflow-valve

Thanks for the article link and the info. I often forget that there's more to this site than just the forum.

More to add... Bosch VP44 injection pump requirements http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/25-fuel-system/415-bosch-vp44-injection-pump-requirements Bosch VP44 injection pump fuel pressure specifications http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/25-fuel-system/49-fuel-pressure-specification-for-bosch-vp44-injection-pumps