HPOP PRESSURE

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Jul 31, 2011 | 08:27 AM

f350custom

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HPOP PRESSURE

i just got done with installing all new hpop orings and the replacement non serviceable plug , hpop hoses , new fuel filter seals , international uppipes , garrett GTP38R turbo last night. now i have a snapon scanner i need to know what is the injection pressure suppose to be i cant if a straight up answer on the pressure at idle an wot . we are reading on the scanner that at idle is between 450-500 and at wot it floats between 2300-2800 its hard around here to keep the pedal planted it wants to pull over 90mph an the cops frown on that.what do you guys think we drove it for maybe an hour

Jul 31, 2011 | 08:52 AM

ToMang07

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Joined: May 2011

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From: Maine

Quote:

Originally Posted by f350custom

Sounds about normal.... at least mine is about the same, I think the highest I've seen mine was like 2910ish, but only for a second.

Jul 31, 2011 | 09:00 AM

EMD_DRIVER

More Turbo

Joined: May 2008

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From: Beaufort, SC

My e99 ran 480 at idle and 26-2800 at WOT, on the stock 15* HPOP. The pump wouldn't hold pressure at WOT and was replaced with a modded 17* pump.

Jul 31, 2011 | 11:07 AM

CSIPSD

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From: Bend, OR

Sounds fine... Whats your duty cycle when doing the WOT runs?

Jul 31, 2011 | 12:07 PM

f350custom

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what do you mean duty cycle ? how long am i on it is that what you mean ? so a modded
HPOP would make a big differents on this thing ? i am looking for fuel mileage and to be able to tow with out problems . next move that we were going to do was a 4inch down pipe to 5inch main pipe . not sure what else needs to be done ?

Jul 31, 2011 | 12:23 PM

CSIPSD

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From: Bend, OR

Quote:

Originally Posted by f350custom

Duty cycle is how hard the pump is working... Watching the pressure is only one piece of the puzzle...

If your making 2800psi at 30% duty cycle, thats a healthy pump.

If your making 2800psi at 60% duty cycle, thats a sick pump.

You dont know squat only watching the pressures.

A modded HPOP on stock injectors would NOT make a big difference.

5" exhaust is for show, it will not give you anything else over a 4" turbo back system.

Jul 31, 2011 | 12:45 PM

f350custom

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thanks for the info . i am going out for a bit we will scan it again an give the numbers when i get back . so 4inch is all i will ever need then thats what we will go with . an the truck has 8 new stock injectors in so i guess we dont need a modded HPOP thanks for all the help . towing and mph is where its at