Engine/Transmission (1998.5 - 2002) VP44 max input pressure

[BRI7070]

I was woundering,

What would be the max input pressure for the VP44?



I have a problem as posted in truck 911 and would like to know if I can leave the 7psi/100gph carter 4600hp in the pusher to assst the stock lift pump?

I am seeing pressures above 15psi at idle and 13 at wot. I say above 15 psi because I pegged my autometer Zseries 15psi gauge.

 

[Pit Bull]

To much pressure can be a problem. Don't know what that number is. Here is some information on the VP-44, http://www.dodgeram.org/tech/dsl/ISB/Vp44.htm

 

[Snow man]

I guess i have been lucky. i ve been running the pusher for well over a yr and 25K miles. I have seen 30+PSi at the inlet of the vp44,at isle,and it runs about 16-21 psi regularly. I have never had a starting problem either. I plan to change over to 1 pump,but i have had no problems to speak of. This truck idles a lot on winter,and plows hard,so it runs much more than the miles would suggest. I think the 25K it has is equal to at least 35K o most trucks,I have plowed for over 230hr this season and total mileage is under 1200miles for those hrs.

 

[Gary - K7GLD]

I have a Carter 4600 7-9 psi pusher added to my truck, with a bypass around it for some pressure relief and a flow path in case it fails - I run 21 psi at idle, 20 psi cruise and never lower than 16 psi under heaviest grades/loads. You'll get some doom/gloom predictions from a few "experts" - but fact is, MANY VP-44's have failed at what was supposedly "safe" input psi - and precious FEW that were running the higher psi...

 

[Big White Beast]

I'm with Gary.....

Can't believe I said that!



I've been running 21 at idle for 15K now and no problems. The only thing I could see as bad would be if you didn't follow the pusher and it over pressurizes at start up. By using the existing pusher power to activate a relay it will effectively disable the pusher at start up allieviating that type of problem.



Garrett

 

[Bigsaint]

Since I put the latest and greatest PE4200 in, and it has settled down with the slightly warmer temps. , I idle at 25-26 psi's. While I'd be just as happy with 15 psi's at idle, it doesn't seem to effect starts, whether hot or cold.



Scott W.

 

[ynot]

I've run 26psi idle and no lower than 15. 5 for 96,000 miles now... T

 

[SSolderitch]

I have a fass pump (without filters) with an inline fuel filter added in the hose on the suction side. I only see 15/16 max at idle (warm), 10-13 cold start ups & normal running. I measure at the pump with a isspro gauge. maybe adding a another filter (restriction) would knock off 2-3 psi? Or at least not put junk thru the pump.

 

[azpete]

Over a year also at the high pressures from a single carter. After replacing my VP44 I started to notice my 15psi gauge pegged. Attached a mechanical and was running 22 at idle. Bought a 30 psi gauge and found that at times it would peg that also. I have replaced the Carter twice, filter and gone to the relocate big line and still the same erratic readings. It must have something to do with the VP. Did change the pressure relief valve in it with no change.

 

[monkeyman]

I ran 22psi at idle, one year latter blew it with code 0216 among others, now running 15psi max.
Rick

 

[DCreed]

I have a fass pump (without filters) with an inline fuel filter added in the hose on the suction side. I only see 15/16 max at idle (warm), 10-13 cold start ups & normal running. I measure at the pump with a isspro gauge. maybe adding a another filter (restriction) would knock off 2-3 psi? Or at least not put junk thru the pump.

you'll want to measure right at the vp44, thats where it matters!

I run a FASS 150 never see under 16psi.