6.7 cummins in a 2nd gen

That sounds like a good plan. You got me thinking though. You said in the other thread one CPN5 equals four cp3s, in what aspect were you talking about?

I converted the 1300cm3/30s for the 22/2 and got 156 LPH, where as a stock cummins cp3 puts out around 180 LPH.

Sorry if all this is derailing your build thread, this pump has caught my attention more than once.
 
kleann said:
That sounds like a good plan. You got me thinking though. You said in the other thread one CPN5 equals four cp3s, in what aspect were you talking about?

I converted the 1300cm3/30s for the 22/2 and got 156 LPH, where as a stock cummins cp3 puts out around 180 LPH.

Sorry if all this is derailing your build thread, this pump has caught my attention more than once.
Click to expand...

I'm not following how you came up with that number for the cpn5, please share. Also the cpn5 is capable of 600+ bar over a cp3. To be honest I don't understand the Bosch numbers.
 
I just used google to convert it into LPH.
here's a rundown though
1 cm3/s equals 3.60 liters per hour x 1,300 equals 4,680, divided by 30 equals 156.
 
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kleann said:
I just used google to convert it into LPH.
here's a rundown though
1 cm3/s equals 3.60 liters per hour x 1,300 equals 4,680, divided by 30 equals 156.
Click to expand...

Straight off the bosch fact sheet, the hydraulic flow rate for my cpn5 pump is:

400-1300mm3/30 s


So is that 400 bar? 400 rpm? Or 400 strokes?

I tried looking for the bosch fact sheet on a cp3 but couldn't find it...
 
The L/Hr is what threw me off back in '11. My logic was that the application was only ~500hp, and the BSFC for that wouldn't be any higher than what was being done with the CP3(s). I never went past that in research.
 
DieselheaD said:
Straight off the bosch fact sheet, the hydraulic flow rate for my cpn5 pump is:

400-1300mm3/30 s


So is that 400 bar? 400 rpm? Or 400 strokes?

I tried looking for the bosch fact sheet on a cp3 but couldn't find it...
Click to expand...

I assumed was 400-1300 was a range.
 
biggy238 said:
The L/Hr is what threw me off back in '11. My logic was that the application was only ~500hp, and the BSFC for that wouldn't be any higher than what was being done with the CP3(s). I never went past that in research.
Click to expand...

Any way you could retrieve one of those cpn5 that got replaced for measuring purposes ?

Only way I can come up with a true number is by measuring the plunger bore and lift of the crank
 
This is really bugging me, did some calculating.

Screenshot_2015-12-27-20-26-02_zpsmapjjagi.png



1 cubic millimeter = 3.60 liters per hour
1 cubic millimeter = .001 liter

so 561 lph?

Or 1300×2 = 2600cm3 ÷ 3.60 = 722.2 lph?
 
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What ratio is that pump set to run at? That case looks like its a pretty big driven gear, so it is underdriven by a decent amount?
 
It is 2/3 crank speed. The cpn5 pumps are rated for 2450rpm max I believe, which was why I changed directions back when I started the project.
 
GRotman said:
It is 2/3 crank speed. The cpn5 pumps are rated for 2450rpm max I believe, which was why I changed directions back when I started the project.
Click to expand...

If the pump was driven at 2/3 crank speed at 6000rpm the pump would be at 1980rpm right?

1650 @ 5000
1320 @ 4000
 
1 cubic millimeter = 3.60 liters per hour
1 cubic millimeter = .001 liter

so 561 lph?

Or 1300×2 = 2600cm3 ÷ 3.60 = 722.2 lph?
Click to expand...

You spec is saying 1300 CC (1.3 litres) in 30 seconds. So thats 2.6 litres a minute. 156 litres per hour.
 
Only thing left to do is try it. I'll be making some contacts to figure out how to drive this pump. Ultimately I'd like to go the inexpensive route. I like fabricating my own stuff so a pump mount should be easy
 
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