The CP4 pump:

McRat

McRat

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Aug 2, 2006
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http://www.bosch-presse.de/TBWebDB/en-US/PressText.cfm?id=4286

This is what the new Dmaxes are getting. Our existing pump is 3 cylinders and rated at 180mPa, this is two cylinders and is rated at 220mPa. Interesting mention that it is designed to support over 100hp per liter, or 660hp in an engine size like the Dmax. To put that in perspective, that is roughly the HP/liter of the ZR-1 Corvette engine, or a SRT-4 turbo Neon.
 
dmaxvaz

dmaxvaz

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Nov 22, 2006
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mcrat said:
http://www.bosch-presse.de/tbwebdb/en-us/presstext.cfm?id=4286

this is what the new dmaxes are getting. Our existing pump is 3 cylinders and rated at 180mpa, this is two cylinders and is rated at 220mpa. Interesting mention that it is designed to support over 100hp per liter, or 660hp in an engine size like the dmax. To put that in perspective, that is roughly the hp/liter of the zr-1 corvette engine, or a srt-4 turbo neon.
Click to expand...

so, does this pump put out more psi with lesser volume? The cr pros are saying this is a step backwards?
 
dmaxfireman

dmaxfireman

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Apr 8, 2007
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2 questions, will this be a swappable item, (switch with our cp3 pump). will our injectors be able to handle 220mpa of pressure??
 
McRat

McRat

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Aug 2, 2006
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Redbowties88 said:
also hasn't there been single cp3 trucks in that hp range as well....?
Click to expand...

Yes. But if you can get the same mm3 out of both pumps, the one that shoots at 2200mPa is going to win.

The key will be how fast we can spin the CP4. Ideally it won't suffer the high RPM fade that the CP3 does. Since it's designed for passenger cars, it might indeed have better high RPM operation.
 
McRat

McRat

Diesel Hotrodder
Aug 2, 2006
11,249
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www.mcratracing.com
dmaxfireman said:
2 questions, will this be a swappable item, (switch with our cp3 pump). will our injectors be able to handle 220mpa of pressure??
Click to expand...

I think the initial testing will be done on Dual Fueler trucks. I do know it's sitting in the valley in the stock location, but do not know if it would be plug-n-play. I doubt it. I've only cracked one LLY injector running max CP3 pressure, but I do not know if I went up to 220mPa. I programmed for 250mPa, and the sensor bottomed out.
 
dmaxvaz

dmaxvaz

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dmaxfireman said:
2 questions, will this be a swappable item, (switch with our cp3 pump). Will our injectors be able to handle 220mpa of pressure??
Click to expand...

the pump flange that bolts to the block looks the same for both pumps, the regulator plug is pointing straight up, and looks like it will plug in too
 
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WICKED DIESELS

WICKED DIESELS

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Apr 16, 2008
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I talked to Bosch, it is smaller in displacement even though each plunger (2) have 2 actions per revolution. Seems to me it was 180lph @ 3500 rpm, vs the CP3's 223lph @ 3500 rpm. It is essentially a lower volume higher pressure pump.

The 4.2 has roller tappet actuators, mainly since the crank has a normal lobe apperance, just like a camshaft (sort of), and the CP3 is a simple eccentric/flat tappet design.
 
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mytmousemalibu

mytmousemalibu

Cut your ride, sissy!
Apr 12, 2008
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What about the Nippondenso pumps on the big I-6 dmax? If that was the manufacture?

A roller pump would be nice:D Instead of our flat tappet type scrubbing across the rotor face.
 
duratothemax

duratothemax

<--- slippery roads
Aug 28, 2006
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I dont think the current LB7/LLY/LBZ/LMM intake manifolds will work with the CP4. Its too wide and would require an indentation in the manifolds to fit I THINK.
 
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