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1999 to 2003 7.3L Power Stroke Diesel
7.3L Power Stroke Diesel equipped Super Duty and Excursion.

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  #1  
Old Tue, December 15th, 2009, 08:51 PM
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Can you ever have too much HPO?
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Old Tue, December 15th, 2009, 08:52 PM
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Do you mean volume or PSI? Or both?
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Old Tue, December 15th, 2009, 09:27 PM
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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.
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Old Thu, December 17th, 2009, 09:06 AM
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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.
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Old Thu, December 17th, 2009, 04:15 PM
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Quote:
Originally Posted by Power Hungry View Post
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.
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Old Thu, December 17th, 2009, 11:21 PM
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Since we are on the HPOP subject, Is it possible to run two stock 17* pupms and is it beneficial?
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Old Thu, December 17th, 2009, 11:29 PM
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Being able to supply more HPO when it's needed is ALWAYS beneficial.
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Old Fri, December 18th, 2009, 12:40 PM
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Originally Posted by choupique108 View Post
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.
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Old Sat, December 19th, 2009, 11:44 PM
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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).
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Old Sun, December 20th, 2009, 01:27 AM
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A guy here in AZ has machined a pump for 24* I am waiting to what he finds out with it.
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