The LML CP3 has two pistons, 4 revolutions per crank revolution. Each time an injector pulses the CP3 pumps fuel. LB7, LLY, LBZ, LMM CP3's have one piston, 6 revolutions per crank revolution.
Full Answer
How does the CP3 work?
Because it has a built in supply pump, the CP3 only needs to be supplied at a low pressure OR VACUUM and it will handle supplying the pumping chambers from there. Whereas previous pumps had to be somewhat pressurized, the CP3 handles its own pressurization. Conversely, users do have to worry about getting enough fuel to the CP3. Remember the COFV ?
Does a CP3 have a pressure relief valve?
There are no internal relief valves in the CP3, only a direct feed to the supply pump. Conversely, if there isn't enough flow to it, the pressure will drop and the supply pump may actually start developing a vacuum in an attempt to get enough fuel. Users needn't worry about pushing fuel to a CP3 at a high pressure.
Can I push fuel to a CP3 at high pressure?
Users needn't worry about pushing fuel to a CP3 at a high pressure. Because it has a built in supply pump, the CP3 only needs to be supplied at a low pressure OR VACUUM and it will handle supplying the pumping chambers from there. Whereas previous pumps had to be somewhat pressurized, the CP3 handles its own pressurization.
What happens if you over pressure the CP3?
This is very bad news for the longevity of the CP3. Diesel fuel viscosity and lubricity falls dramatically with an increase in temperature. Hot fuel within the CP3 is bad. Basically, one needs to get enough fuel from the tank to the CP3 inlet to keep the CP3 well fed, yet not over pressure it doing so.
How does a CP3 injection pump work?
5:5612:12What is a cp3 and how does it work - YouTubeYouTubeStart of suggested clipEnd of suggested clipThis pump supplies pressure to you know gear driven pump. It supplies pressure to the main pistonsMoreThis pump supplies pressure to you know gear driven pump. It supplies pressure to the main pistons which make your main pressure your big pressure so once the fuel.
How much HP can the CP3 handle?
Turbos can only spin so fast and flow so much air, injectors can only move so much fuel, and high-pressure pumps can only maintain so much rail pressure. In both Cummins and Duramax applications, the factory Bosch CP3 pumps can only flow enough fuel to support about 600 hp at the wheels.
Can you turn up a CP3 pump?
is there a way to turn up your stock fuel pump to get more fuel flowin through? I assume you mean the CP3? Yes and no. You can modify the pump, but they aren't like a mechanical pump that you can turn up.
Does a CP3 pump need to be timed?
Unlike previous (pre-common-rail) injection pumps, it has fewer tasks to perform. The CP3 injection pump's sole job is to create and regulate high-pressure fuel (it's not timed with the engine's crankshaft and camshaft).
How much HP does a 10mm CP3 add?
Description. Exergy Performance Duramax 10mm CP3 Injection Pump will support up to 800HP on 2001-2016 Duramax applications.
How long does a CP3 pump last?
250,000 milesThe Bosch CP3, used on the '01-to-'10 Duramax and '03-to-current Cummins engines, is known to last 250,000 miles or more before needing to be replaced. Of course, performance enthusiasts also know these pumps are only capable of supporting approximately 500 hp.
How do I know if my CP3 is bad?
This is a one-stop symptom checker for issues related to common rail injectors and CP3 pumps.High-Pressure Common Rail Basic Information and Function. ... Do You Have No Start Or a Hard Start? ... Do You See Black Smoke? ... Can you hear Knocks? ... Do You Have Slow Deceleration? ... Is there Blue/White Smoke at Idle When Cold?More items...•
How much fuel pressure does a CP3 need?
If you are running a CP3 in a high-performance application, we highly recommend installing a fuel supply pressure gauge to ensure there is correct fuel pressure at all times. Recommended feed pressures for CP3 and CP4 equipped engines: Dodge/Cummins '03 – '16 (5.9L & 6.7L) no less than 8 PSI / no more than 15 PSI.
How do you test a CP3 pump?
You can simiulate max output for the CP3 by unplugging the FPR and fuel sensor. This forces the CP3 to put max output on the fuel rail. To do the check you will have to pull you glow plugs and watch excessive fuel from coming out the glow plug holes.
Why are common rail pumps timed?
The Common Rail System Old type mechanical fuel systems are restrictive due to the fact that they have very limited adjustment within the system – they mainly rely on mechanical timing of the pump to the engine – this is not the case for common rail.
Does a common rail fuel pump need to be timed?
common rail in the likes of a tractor engine is just pressurized diesel, it needs no timing.
What is the CP3 on a Duramax?
The Fleece Performance CP3K is a modified Duramax LBZ CP3 designed to eliminate the factory fuel flow restriction that begins at 3,000 RPM. If you have a stock CP3 pump you are losing fuel flow and rail pressure after 3000 RPM, which correlates to lost horsepower when you need it most.
What is a CP3 pump?
The CP3 is a 3 piston metered inlet pump. By metered inlet that means that the Fuel Control Actuator valve controlled by the ECM meters fuel going into the pumping chambers to control how much fuel the CP3 pumps and thus the engine rail pressure.
Where is the ECM valve located?
It is a solnoid operated valve located on the bottom driver side of your pump. The ECM controls the action of this valve. Fully open and it has full flow of fuel into the High pressure side of the pump............. closed and it will shut off the fuel supply..
Is diesel fuel bad for a CP3?
Diesel fuel viscosity and lubricity falls dramatically with an increase in temperature. Hot fuel within the CP3 is bad. Basically, one needs to get enough fuel from the tank to the CP3 inlet to keep the CP3 well fed, yet not over pressure it doing so.
Does a CP3 have relief valves?
There are no internal relief valves in the CP3, only a direct feed to the supply pump. Conversely, if there isn't enough flow to it, the pressure will drop and the supply pump may actually start developing a vacuum in an attempt to get enough fuel. Supplying the CP3.
Can a P7100 injector pump be used with a CP3?
Whereas an injection pump like a P7100 can tolerate a large difference in flow rates to/through it with relatively little pressure change, the CP3 cannot. If you try to push too much fuel to the CP3, the pressure will skyrocket.
