How much pressure to the CP3
05-16-2008, 11:52 AM
#1
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How much pressure to the CP3
How much pressure can you put to the inlet side of the CP3 from a pusher pump I know they only need 15psi but what is the max. Thanks
05-16-2008, 12:05 PM
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I was told a long time ago that the pump will take up to 90#. With that said, what are you cooking up? I know the Fuel Boss is progressive. It starts off at like 18 at idle and goes way up from there.
05-16-2008, 01:28 PM
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I run 30PSI to mine because thats all the higher my gauge goes.
I heard some guys saying that a lot of inlet pressure will increase your rail pressure at idle. I have not seen it yet and obviously its not a issue with others running 50+
I heard some guys saying that a lot of inlet pressure will increase your rail pressure at idle. I have not seen it yet and obviously its not a issue with others running 50+
05-16-2008, 01:41 PM
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50 psi with a 1/4inch id tube isstill less volume than 15psi with a 1/2inch tube,i would be more concerned with volume than presue,you could have a 100psi with a 1/4 tube and still get low gpm,ideal would be a 3/4inch id tube with 20 psi behind it,u would never run out of fuel,i know the cp3 is diferent than the vp44 but the vp didtnt like high inlet pres,if it wanted 50psi into it cummins would have gave a factory lp that did that
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05-16-2008, 03:01 PM
#11
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And this is 50 psi with 1/2" tubing... 200gph.
05-16-2008, 03:52 PM
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The inlet in the CP3 is only 0.110 in diameter. We are seeking higher pressures to reduce cavitation and fill all the small cavities in the pump. This will increase the VE, or volumetric efficiency of the pump. 3/8" fuel hose is plenty big, as long as the supply pumps output capacity is sufficient.
05-16-2008, 04:11 PM
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The inlet in the CP3 is only 0.110 in diameter. We are seeking higher pressures to reduce cavitation and fill all the small cavities in the pump. This will increase the VE, or volumetric efficiency of the pump. 3/8" fuel hose is plenty big, as long as the supply pumps output capacity is sufficient.
That's what I was going to point out. The CP3 inlet is the biggest bottleneck. 1/2" hose really isn't needed.
