What does the foil delete do?
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
Stolen off another site:
The Powerstroke Diesel Direct Injection Turbo (DIT) Engine utilizes a unique fuel injection system. Absent from a normal fuel injection system are a mechanical injection pump and injection lines. The components which replace the traditional mechanical injection pump include a high pressure oil pump and reservoir, pressure regulator for the oil and passages in the cylinder head for flow of fuel to the injectors.
Fuel is drawn from the tank by the tandem fuel pump which circulates fuel at low pressure through the fuel filter/water separator/fuel heater bowl and then fuel is directed back to the fuel pump where fuel is pumped at high pressure into the cylinder head fuel galleries. The injectors are then fired by the Powertrain Control Module (PCM), which are controlled by the PCM but are hydraulically actuated by the oil pressure from the high pressure oil pump. This is what Ford Motor Co. calls a Hydraulic Electronic Unit Injection system, or HEUI system. The control system for the fuel injectors is the PCM and the injectors are fired based on various inputs received by the PCM.
The Powerstroke Diesel Direct Injection Turbo (DIT) Engine utilizes a unique fuel injection system. Absent from a normal fuel injection system are a mechanical injection pump and injection lines. The components which replace the traditional mechanical injection pump include a high pressure oil pump and reservoir, pressure regulator for the oil and passages in the cylinder head for flow of fuel to the injectors.
Fuel is drawn from the tank by the tandem fuel pump which circulates fuel at low pressure through the fuel filter/water separator/fuel heater bowl and then fuel is directed back to the fuel pump where fuel is pumped at high pressure into the cylinder head fuel galleries. The injectors are then fired by the Powertrain Control Module (PCM), which are controlled by the PCM but are hydraulically actuated by the oil pressure from the high pressure oil pump. This is what Ford Motor Co. calls a Hydraulic Electronic Unit Injection system, or HEUI system. The control system for the fuel injectors is the PCM and the injectors are fired based on various inputs received by the PCM.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
That's odd. That is not correct... The fuel does NOT circulate back to the fuel pump. Once it clears the fuel bowl (the unused fuel is returned to the tank from there, unless a CCK or RR is installed), it goes straight to the heads & injectors where the HP oil also is routed in separate passages. The fuel is pressurized in the injector by the HP oil and injected directly into the combustion chamber. The HP oil ranges from 500psi at idle to 3000psi, more on modified trucks.
Not sure where you got that one Chris, but scrap it...
Not sure where you got that one Chris, but scrap it...
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
The reason to upgrade it is because once you start to mod your truck and get some hot tunes, the stock HPOP can't keep up with the duty cycle demands of the injectors (even stock ones). With a dual pump or hopped up single pump, it will drive the largest of injectors without losing any pressure.
There are also lower performance 15 degree pumps in the early trucks. The later models run 17 degree pumps which keep up better with the higher demands, but still drop off with hot tunes.
Hope that helps!
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
Here's a great thread discussing HPOP upgrades.
https://www.ford-trucks.com/forums/6...side-chat.html
https://www.ford-trucks.com/forums/6...side-chat.html
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Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
I experienced that the other day getting on it in 140 at WOT and it cut out at the top, about 80mph started quiting but one heck of a cloud behind me..
Hey Joe, i mentioned it before, do i see a thread" Who,s got the cleanest engine compartment". Looks good..
Hey Joe, i mentioned it before, do i see a thread" Who,s got the cleanest engine compartment". Looks good..
Posting Guru
Joined: May 2007
Posts: 1,967
Likes: 0
From: Bowling Green, Kentucky
Izzy Do you spray your under the hood area with high pressure. I thought mine looked good but DAMM thats nice. Of course mine is a 99 and is used on the farm.
Chris there is nothing wrong with yours for sure.
Chris there is nothing wrong with yours for sure.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
I still need to put header wrap on both of my CAC tubes. I am going to do it. No hurry right now, it is winter. I did pull the foil off of mine, but I am not happy with it any more despite polishing it up. Looks good, not performing at optimum. Heat transfer my friends.
CSIPSD will likely be along to debunk this one. Hard to argue with the laws of physics though.
