Just wonder out of curiosity.......I was told that the p-pump on a Ford school bus was totally different than a dodge ram p-pump and you can't turn them up...is this true?

 

u can turn them up, there just an industrial pump. the plungers are different style and the pump shafts are supposed to be weaker. im running a motor out of a bus. i laid down 339 with alot of boost leaks with it

 

you can do alot to them they are just a bad design for us

 

going off ur sig im gonna guess u were thinking bout a p-pump swap using it for yours? if so, i would steeer clear of it if thats the case. good luck any how

 

Nope they are the same animal and all the free hp tricks will work. What tranny is behind it? Thats the part I'd worry about

 

i think its a allison on the bus and yes i was thinking about the p-pump option....can't really see them being any weaker pump then the dodge runs....just a different color
so will delivery valves and all that fit them?

 

yes, thats all the same. just the shaft was made for industrial use. not meant to spin the 4+k that u would be wanting out of it.

 

yeah guess that wouldn't work too good for me then....i figure my vp44 is going to be going out soon so i thought i would try and get ready for the swap cause i am not going to bye another PS vp44 pump when it can't give me what i'm after anyways

 

my pumps an industrial p-pump off an 8.3 cummins that was in a dump truck and i've had no problems with it

 

are the 8.3l pumps bigger?