Which HPOP
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
No the bad thing about the DIY kit is just that- you have to Do It Yourself... go out and buy all the fittings and hoses you need. It includes the adapter and only the parts you can't buy, and at over $900 its expensive for what you get.
Elder User
Joined: Aug 2004
Posts: 544
Likes: 0
From: SLC, UT
The DIY kit now comes with all parts needed for $975. Don't hear too much about the gen 3 pump from swamps. Would like to know about that if anyone here has it. And I've heard plenty of times of the truck that got burned down running one of the older style.
Last edited by dpwilson; Sep 23, 2007 at 03:48 PM.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
There is a 7.3 (actually two) out there that use a mechanical injection pump with nozzles in the heads instead of unit injectors. The pumps come off of old v-8 mack truck engines. Im assuming a big deal of sarcasm from john. They sound almost like a mechanical cummins engine, due to the fact they are no longer "powerstrokes" with their classic HEUI inejction sytem.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
To help answer those questions about cranking the pressure up on the HPOP.
It's very important that you remember there is a difference between volume and pressure.
You can have very high pressure with very little volume.
You can also have very high volume with very little pressure.
Trying to run the injectors at 5000 psi, but no volume to keep up with the increased demand will only result in the pressure dropping off precipitously.
Now with big oil set at 3000 psi max, that is the equivelent of putting dual quads on an old big block V-8 engine. Those dual carbs will feed that engine whatever it will be able to swallow without breaking a sweat.
Same with the dual HPOP. They are now working together and not ever having to max out to keep up with that 140 smoke tune. There is plenty of oil VOLUME to be able to maintain the desired 3000 psi PRESSURE.
Any questions?
It's very important that you remember there is a difference between volume and pressure.
You can have very high pressure with very little volume.
You can also have very high volume with very little pressure.
Trying to run the injectors at 5000 psi, but no volume to keep up with the increased demand will only result in the pressure dropping off precipitously.
Now with big oil set at 3000 psi max, that is the equivelent of putting dual quads on an old big block V-8 engine. Those dual carbs will feed that engine whatever it will be able to swallow without breaking a sweat.
Same with the dual HPOP. They are now working together and not ever having to max out to keep up with that 140 smoke tune. There is plenty of oil VOLUME to be able to maintain the desired 3000 psi PRESSURE.
Any questions?
Posting Guru
Joined: Apr 2005
Posts: 1,190
Likes: 0
From: minneapolis, ks
There's some people who feel that higher icp helps, but when tuning my truck we had peak power at 3200-3300 psi.
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Senior User
Joined: Nov 2006
Posts: 179
Likes: 0
From: TN
It will put out what pressure the tuning calls for, most off the shelf tuning will run in the 3000psi range.
Of the ones I have seen dyno different pressures I have seen 10hp difference between 3000psi and 3800psi. I will tell you that there is an internal problem with injs trying to run mor ethen 3200psi, in some its not as apparent as others but if the problem pops up it can be detrimental to your engines health, i.e. fuel injection at very wrong times.
Of the ones I have seen dyno different pressures I have seen 10hp difference between 3000psi and 3800psi. I will tell you that there is an internal problem with injs trying to run mor ethen 3200psi, in some its not as apparent as others but if the problem pops up it can be detrimental to your engines health, i.e. fuel injection at very wrong times.
Postmaster
Joined: Dec 2005
Posts: 3,405
Likes: 0
Im considering doing my own DIY stealth setup, since I got a 15* setting collecting dust in my garage. So does the kit come with everything? If so this might be my next venture, since Im running out of the cheap mods and gradually are getting more expensive.
Elder User
Joined: Oct 2006
Posts: 635
Likes: 0
From: New York
Originally Posted by dpwilson
The DIY kit now comes with all parts needed for $975. Don't hear too much about the gen 3 pump from swamps. Would like to know about that if anyone here has it. And I've heard plenty of times of the truck that got burned down running one of the older style.