Increased ICP, Bigger HPOP, What Can It Do For Me?

[theSLEEPER]

OK... So this is my question.
The way I understand, which may not be correct. Is that the HPOP is of fixed displacement. Meaning it always pumps a given amount for a given RPM. Is this correct?

So, taking the RPM's out of the equation, it's like a water hose...Right?

Lets say you have a water hose with the same amount of flow at all times...

There's a nozzle on the end, like the IPR(yellow), and two nozzles branching off, like the oil rails(red).


http://i100.photobucket.com/albums/m5/ohmydodge/Hose.jpg

So... If you want the two red hoses that are branching off to have LESS pressure, you open the yellow one on the end to get less pressure? And to get more you close the yellow valve?

First of all, is this correct? Or am I way off base? I will ask more questions if it is.

[907DAVE]

Couldn't have said it better myself......your right on.

[theSLEEPER]

OK. Thanks! So, if you can hold 3100 throughout the RPM range in WOT, you'll be getting the best atomization possible?

[cleatus12r]

That's the theory.

[theSLEEPER]

Can you ever have too much HPO?

[907DAVE]

Do you mean volume or PSI? Or both?

[cleatus12r]

You can have too much pressure. You can't have too much volume unless you have so much that the injection pressure regulator cannot bypass enough and you end up with excessive PSI anyway.

[Power Hungry]

It's be theorized that the injection systems don't respond well above 3200 PSI with most systems actually working better at about 2900-3000 PSI. Part of the reason is that the poppets on the injector start floating at some point and don't allow proper injection function.

Most tuners generally limit ICP to about 3000 PSI at WOT. However, at cruise your ICP is closer to about 1600-1800 PSI so the whole over-pressurization issue becomes fairly moot. That is unless you're commanding 3600 PSI at cruise. ;)

[theSLEEPER]

It's be theorized that the injection systems don't respond well above 3200 PSI with most systems actually working better at about 2900-3000 PSI. Part of the reason is that the poppets on the injector start floating at some point and don't allow proper injection function.

Most tuners generally limit ICP to about 3000 PSI at WOT. However, at cruise your ICP is closer to about 1600-1800 PSI so the whole over-pressurization issue becomes fairly moot. That is unless you're commanding 3600 PSI at cruise. ;)

How much do ya'll think the HPOP is drawing from the motor, say at 2200 rpm's with 3000 psi.

[choupique108]

Since we are on the HPOP subject, Is it possible to run two stock 17* pupms and is it beneficial?

[cleatus12r]

Being able to supply more HPO when it's needed is ALWAYS beneficial.

[Power Hungry]

Since we are on the HPOP subject, Is it possible to run two stock 17* pupms and is it beneficial?

They already do... it's called a Terminator Pump. Basically, two pumps end to end with a coupler in the middle. There are 1 or 2 other companies that make them as well.

[choupique108]

Is it something that i could do myself though?

[Power Hungry]

Depending on what type of setup you plan on running, you mas also want to look at this:

http://www.dieselsite.com/overdrive/
and
http://www.dieselsite.com/adrenaline/

I am currently testing these units combined and they provide more than double the oil volume of stock and are a simply bolt-in installation. Here's the thread on the installation:

http://forum.gopowerhungry.com/showthread.php?t=2571

Take care.

[choupique108]

Im really liking the Adrenaline. That will probally be my next mod for sure. I was just curious about the dual stock pumps bc i have a 17* pump sitting on the shelf in my shop.

[907DAVE]

However, at cruise your ICP is closer to about 1600-1800 PSI so the whole over-pressurization issue becomes fairly moot.

Wow, should it be that high? Dont think I have ever seen my ICP that high @ cruise(60mph).

[ChuckD]

A guy here in AZ has machined a pump for 24* I am waiting to what he finds out with it.

[Power Hungry]

Chuck,

It gets to a point where increasing the angle of the swashplate reduces the reliability of the pump. That's a lot of angle for the sliders to handle. It make work for a while but I'd be concerned about long-term reliability.

Dave,

It depends a lot on what your definition of "cruise" is. For me, it's 70-75 MPH rolling down the highway at 2200 RPM. Stock, this puts me at 1600-1800 PSI while modified puts me a bit higher at 1800-2000 PSI.