A question for Diesel Power...

[DF5152]

Since you have introduced your pumps I believe you have some knowledge about them. can you possible elaberate on the cause of the leak the stock pumps are experiencing and the cure?



Dan

 

[Diesel Power]

Since you have introduced your pumps I believe you have some knowledge about them. can you possible elaberate on the cause of the leak the stock pumps are experiencing and the cure?



Dan

yes depending how old they are, they will leak due to many things, from the factory they may not have been machined properly and had a not so flat mating surface, or they have been introduced to extrem heat which will cause it to warp alittle, there are seals and gaskets and barrels and plungers. sight un seen it is really hard to say. thanks

 

[DF5152]

Thanks for the reply but i was looking for something a little more specific. I find it hard to believe that all the leaking pumps are do to so many potential problems. its probably one problem. bad batch of seals or seal/shaft wear due to lack of fuel, which would cause excesive heat. I was more wondering if there is a specific seal or shaft that is wearing due to lack of lubrication or poor quality. What is your definition of extreme heat? the pumps you are making will they work with the factory lift pump? Is there a specific inlet pressure and flow that works best with them. can you over pressure the pump or bypass in the cp3 and cause damage?

 

[Diesel Power]

Thanks for the reply but i was looking for something a little more specific. I find it hard to believe that all the leaking pumps are do to so many potential problems. its probably one problem. bad batch of seals or seal/shaft wear due to lack of fuel, which would cause excesive heat. I was more wondering if there is a specific seal or shaft that is wearing due to lack of lubrication or poor quality. What is your definition of extreme heat? the pumps you are making will they work with the factory lift pump? Is there a specific inlet pressure and flow that works best with them. can you over pressure the pump or bypass in the cp3 and cause damage?

sorry i was trying to keep it simple,extream heat is defined as more than the pumps design limits, which would cause direct failure and seal replacements. our pumps will not opperate properly with out a pressure of about 40 psi, the stock lift pump would fail the cp3 in about 1 hard pull as it only provides about 6-8 psi, not nearly enough fuel. the fass 150 modded to 40psi is what we reccomend. we have had pressure as high as 120psi , while more power was made it limited the reliability of the pump. thanks :-laf

 

[DF5152]

at 120 psi reliabilty of which pump the fass or cp3? on the pumps you are modifing have there been any issues with wear on any specific part prior to modification?

 

[Diesel Power]

at 120 psi reliabilty of which pump the fass or cp3? on the pumps you are modifing have there been any issues with wear on any specific part prior to modification?

the fass cant keep up with 120 psi and the 40 psi is compleatly safe, no problems that we have seen. !

 

[AEzzo]

the fass cant keep up with 120 psi and the 40 psi is compleatly safe, no problems that we have seen. !

I was wondering why the high pressure was even needed? It's my understanding that the CP3 has it's own 100 PSI pump that is used before it generates the fuel line pressure. It sounds like what is really needed is a pump that puts out more volume.

 

[Diesel Power]

correct the volume is what is needed, but 40 psi meets that volume requirement, 15-20psi just wont do it, this is serious volume and pressure we are talking about. :-laf

 

[Diesel Power]

the pump (cp3)does generate a low pressure fuel between 80 and 180 psi before it enters the high pressure chambers, but to get that 80-180psi you need constant volume going into the cp3 thats wear the 40 psi FASS 150 comes from!! Oo.

 

[AEzzo]

I've never been able to find a flow chart on the FASS. How many GPH are we talking about?

 

[Diesel Power]

I've never been able to find a flow chart on the FASS. How many GPH are we talking about?

at the standard 15-20psi the fass 95 will give just about that. the fass 150 is the same, and thats what we use, it would be 150gph or better at 40psi!!. alot has to do with draw down rate @ 40psi it will not draw down much at all, but at 15-20 it can be drawn down to single digits with no problem!!! it is giving more constant volume. :-laf

 

[AEzzo]

at the standard 15-20psi the fass 95 will give just about that. the fass 150 is the same, and thats what we use, it would be 150gph or better at 40psi!!. alot has to do with draw down rate @ 40psi it will not draw down much at all, but at 15-20 it can be drawn down to single digits with no problem!!! it is giving more constant volume. :-laf

You would'nt have a flow chart to back that up would you?

 

[Diesel Power]

your talking about the fass gph rate right?? the fass # is what fass says it flows, we have a pretty good idea what it flows but no flow charts on the fass 150 system.

 

[AEzzo]

The only reason I ask is alot of pumps are rated at free flow. My setup in my truck flows about 70-75 GPH at 15 PSI. Would this be enough to feed one of your CP3's. I realize that additional flow is used for cooling but I have a hard time believing that 150 GPH is needed.

 

[Diesel Power]

The only reason I ask is alot of pumps are rated at free flow. My setup in my truck flows about 70-75 GPH at 15 PSI. Would this be enough to feed one of your CP3's. I realize that additional flow is used for cooling but I have a hard time believing that 150 GPH is needed.

you need to understand that the fuel needed to push up to 35,000psi constant are tremendous, if you wish to use your 75gph pump on our cp3 thats fine but dont get mad when you've toasted your pump----we only recomend this because it works, do it right the first time and you will be glad you did. !!! Oo.

 

[speedyjdl]

How do you mod a FASS 150 for 40psi?

 

[AEzzo]

you need to understand that the fuel needed to push up to 35,000psi constant are tremendous, if you wish to use your 75gph pump on our cp3 thats fine but dont get mad when you've toasted your pump----we only recomend this because it works, do it right the first time and you will be glad you did. !!! Oo.

I am trying to understand. But all I've heard from you is a sales pitch. Without flow data everything you say is all but meaningless. I would think you would be able to tell us what exactly is needed in the way of flow. How can you not know exactly what the FASS flows at 40 PSI. I would tend to think the 150 is rated at free flow and would drop off at higher pressure. I'm not trying to start an argument, but trying to learn and make the best decision possible before laying down my hard earned money. To do this I need facts and not a sales pitch. :-laf



Trying to figure out the BSFC of a 600 HP Cummins and I come up with about 70 GPH. Now I added about 30% to figure in cooling flow. I could be wrong but this sounds a little more reasonable.

 

[Maverick]

volume

just put my fuel press fitting in today. after all we read about pressure @ flow or volume changing feed pumps fuel lines fass 95 150, holley whatever you like. look at the feed hole size into the cp3 nomatter what you put to it (fuel) that tiny hole is only going to let so much in. and cranking up the pressure might just introduce more air in the fuel with the stock tank feed lines (tank to pump) but after all that thought i could be wrong.

 

[Diesel Power]

I am trying to understand. But all I've heard from you is a sales pitch. Without flow data everything you say is all but meaningless. I would think you would be able to tell us what exactly is needed in the way of flow. How can you not know exactly what the FASS flows at 40 PSI. I would tend to think the 150 is rated at free flow and would drop off at higher pressure. I'm not trying to start an argument, but trying to learn and make the best decision possible before laying down my hard earned money. To do this I need facts and not a sales pitch. :-laf



Trying to figure out the BSFC of a 600 HP Cummins and I come up with about 70 GPH. Now I added about 30% to figure in cooling flow. I could be wrong but this sounds a little more reasonable.

your statments have been answered, this is what we have come up with to supply enough fuel for the modded cp3, what we do to mod the fass is proprietary. think about it you need for the stage 1 enough flow for at least 7-800hp. that figure you posted is not close because your not factoring in long duration events and high pressure. 600hp looks good on paper but how does it get to that power level, at that level you are running the rail dry, it starts about at 500hp w/ duration and pressure boxes, belive me there is more to it than this, while i could right a 10 page report on this and relating matters---i wont. this is not a sales pitch, if you dont belive what we (the people modding the pump) say you should do in order for things to properly opperate, than why even worry about the cp3. sorry but i really dont have any data that i can release on the modded pumps yet

 

[Diesel Power]

just put my fuel press fitting in today. after all we read about pressure @ flow or volume changing feed pumps fuel lines fass 95 150, holley whatever you like. look at the feed hole size into the cp3 nomatter what you put to it (fuel) that tiny hole is only going to let so much in. and cranking up the pressure might just introduce more air in the fuel with the stock tank feed lines (tank to pump) but after all that thought i could be wrong.

maverick, you would be very surprised to see what even a stock pump will take in volume wise, the inlet is not the restriction on a stage 1!! the cp3 will suck fuel also-so you kinda got a push and pull effect!!