[Peoples16127]

I have a 1st generation 5.9 in a pulling tractor, we are restricted to a rotary pump, so I replaced the VE with a Stanadyne 450 pump. I would like to upgrade the lift pump, but keep it mechanical. Is the plunger style pump an improvement? Is it a direct bolt in for the diagram pump? Any other ideas?

Thanks
Rich

 

[myother4x4isaCJ7]

I have a 1st generation 5.9 in a pulling tractor, we are restricted to a rotary pump, so I replaced the VE with a Stanadyne 450 pump. I would like to upgrade the lift pump, but keep it mechanical. Is the plunger style pump an improvement? Is it a direct bolt in for the diagram pump? Any other ideas?

Thanks
Rich

It is a great upgrade!!!! You just need to know the psi requirements of your current pump. A factory piston pump is capable of well over 30psi but a common one (I’m using this) is a piston pump with a spring limiting the pressure to 12-15 psi.

 

[9297oldram]

The stock VE pump's factory LP puts out 3-5 psi, the IP can handle about 15 psi before it could blow out the front seal.

Not sure what your current IP can handle as far as PSI.

 

[1972RedNeck]

I have a 1st generation 5.9 in a pulling tractor, we are restricted to a rotary pump, so I replaced the VE with a Stanadyne 450 pump.

Did I miss something?

 

[Peoples16127]

Some of the postings I have read, inferred that a spacer and extra gasket are required to mount the plunger pump onto a Gen 1 motor, any thoughts?

Where is a good place to buy a pump with 13 psi output?

Some other posts suggest that the Stanadyne pump would like to have 12 to 14 psi supply pressure.

Thanks
Rich

 

[myother4x4isaCJ7]

Some of the postings I have read, inferred that a spacer and extra gasket are required to mount the plunger pump onto a Gen 1 motor, any thoughts?

Where is a good place to buy a pump with 13 psi output?

Some other posts suggest that the Stanadyne pump would like to have 12 to 14 psi supply pressure.

Thanks
Rich

I got my pump from thehungrydiesel.com mine is the 12psi version they also have one for 15psi yes you need the spacer and two gaskets.

 

[myother4x4isaCJ7]

I also highly suggest using studs to mount the pump instead of bolts it makes life so much easier. They are m8x1.25 55mm long

 

[Peoples16127]

Thanks for the help

 

[9297oldram]

Did I miss something?

Don't know did you? What do you think you missed?

 

[justinfonder]

I have a 1st generation 5.9 in a pulling tractor, we are restricted to a rotary pump, so I replaced the VE with a Stanadyne 450 pump.

Did I miss something?

Roosa master 450, it’s a rotary injection pump.

 

[1972RedNeck]

Roosa master 450, it’s a rotary injection pump.

Agreed, but isn't the VE considered a rotary as well? Or will the Roosa Master move more fuel?

 

[Remps]

Fair Valley Performance They have stanadyne pumps that put out 400 cc. But don't they pop injectors at 1800-2000 psi? That only about half what a ve pops injectors at. Would be interesting to see the difference in performance.

 

[Greenleaf]

I didn't understand replacing a rotary pump with another rotary pump, but beside that, there are high pressure piston lift pumps fAND there are low pressure piston lift pumps, like for the VE injection pump. They provide roughly 13-14 psi
they are very popular. Don't use a high pressure piston lift pump.

 

[Peoples16127]

The VE pump max output is about 250 CC per stroke, the Stanadyn pump is about 450 CC per stroke. Inline pumps are not allowed by rule. I want to make sure I have enough volume to the Stanadyn pump and I do not want to use an electric pump. I have been lead to believe that the plunger pump has a higher volume than the diagram pump.

Rich

 

[justinfonder]

The VE pump max output is about 250 CC per stroke, the Stanadyn pump is about 450 CC per stroke. Inline pumps are not allowed by rule. I want to make sure I have enough volume to the Stanadyn pump and I do not want to use an electric pump. I have been lead to believe that the plunger pump has a higher volume than the diagram pump.

Rich

you are correct in that the piston pump will provide more volume than the diaphragm style. i've seen these pumps run on a diaphragm style pump so you should be more than good with a low pressure piston pump.

- you can use any old 2nd gen piston pump and replace the spring with a lighter one to drop the pressure.

- you do need the "spacer" between the pump and the block

- you'll also need the 2nd gen style fuel line from the lift pump to the filter head

in the mighty VE's defense, they can make around 310-320cc max @ 2000rpm. starts to drop off from there, but I have a pump making ~250cc almost all the way to 4000rpm. you'll never get that out of a roosa master

 

[Greenleaf]

The spacer is #3914284

 

[RCCUMMINS89]

volume/fuel in cc is per 1000 strokes, btw. With all pumps, the restriction (opening pressure and injector/orifice size) has a very large control over that number. It is hard to compare apples and oranges.

 

[Peoples16127]

I agree that flow is a function of supply and discharge pressure, in this case both pumps were flow tested by the same pump shop and the injectors were set by the same pump.

Thanks
Rich