Engine/Transmission (1998.5 - 2002) TQ. Vaalve body

[duckcarvr]

I may want to add a little more HP but not much. i have an EZ [not on right no] and maybe add some 275 injecters. I also have a pac brake which can put extra tension on the trany. how much torque converter and valve body do i need. i want to spend the least i can safely get away with. I will get a new VP44 on next week and need to know if i should replace the worn out fuel pump on the engine because i had a Bd pump put on the rail in front of the tank. Im getting about 20 psi out that pump if i add the new one on the engine and it produced 14 psi would i be getting 34 psi or would it remain with the highest pressure of the two?? If it does compond pressure how do i reduce it? Getting ready to take off on a long trip to Nev. and AZ and want it to be dependable. thanks robert

 

[duckcarvr]

I spent a long time on the phone today to get an answer on what pressure would be with in-line pumps. No one could answer; if the two pumps would compound, partially compond or just take the highest pressure from one pump? I have also asked this question on TDR twice and never got an answer. someone on here has to know, too many great mechs out there not too! Ther is nothing wrong with my transmission at this time just preventative if not too costly... ... ... ... ... ... and i wrote this addendum just to get it to the head of the pack again. forgive me robert

 

[Slim's Ram]

I have a bd pusher pump on the frame rail and a good lift pump in the factory location and I am getting 29psi at idle, 27psi cruising and 22psi wot. I have run this system for about 20,000 miles and now the diaphram in my vp 44 is cracked ( I THINK ). Runs fine, just starts hard once warmed up. I would recommend regulating the pressure down to around 15-18psi.



P. S. Maybe the higher pressures didn't kill my VP-44 as it has 178,000 on original VP



Thanks, Chris

 

[duckcarvr]

Thanks Slim..... from fat robert! Called BD they said their pump is only 14 psi. so if thats the case then pumps in line do compound pressure. both of yours are good and you are getting 28 psi. I am only getting 20-21 so my old lift pump must doing something. they say with higher pressures can cause hard start issues. my BD pump is activated by oil pressure so it starts on the old pump, or vp44 depending how bad the old pump is. well i will have them put both LP and IP on and see what happens. if higher pressure will damage the flex plate then i will have them put something on to limit it to 18 to 20 psi. thanks again robert

 

[DCreed]

depending on the type of lift pumps you are using they will not operate efficiantly or effectively pulling/pushing THROUGH each other. 10-15psi is what the 44 needs, too much/little can and will harm it. set-up a bypass system to use pumps seperatly as a back-up. At 325hp a decent 89% billet cover single will be fine. get a better valvebody than stock.