VP44 *REBUILD* info
01-10-2006, 09:57 PM
#32
DTR Advertiser
Originally Posted by Puke
Do you mean "capable of producing? or is that the pressure inside the line after the injector opens????
How big are the orfices (or nozzles, or whatever you call them) on a standard injector??? They must be awfully small if they are to pop off at 4k but the line will still have 20K pressure in it. Even a .004 hole would be dumping a couple quarts of diesel every couple minutes into each cylinder at 20K pressure..woudn't it.
If the injector opens at 4,000 psi, , then won't everything past 4000 psi be bled into the cylinder??? That hole has got to be awfully small. DOesn't it.
By the way, Why such high pressure, you get a fairly good atomized spurt with just a few thousand pounds.
This is a very interesting discussion. I am learning a lot.
How big are the orfices (or nozzles, or whatever you call them) on a standard injector??? They must be awfully small if they are to pop off at 4k but the line will still have 20K pressure in it. Even a .004 hole would be dumping a couple quarts of diesel every couple minutes into each cylinder at 20K pressure..woudn't it.
If the injector opens at 4,000 psi, , then won't everything past 4000 psi be bled into the cylinder??? That hole has got to be awfully small. DOesn't it.
By the way, Why such high pressure, you get a fairly good atomized spurt with just a few thousand pounds.
This is a very interesting discussion. I am learning a lot.
01-10-2006, 09:58 PM
#33
Registered User
I am looking at putting a van aaken box on.
But don't want to change any durations???? I heard somewhere that you can have a failure sometimes....
The last thing I need or want is more horsepower, but I wouldn't mind better fuel economy. That's why I am looking at the van aaken. Is that the same thing that is referred to as a wire???
But don't want to change any durations???? I heard somewhere that you can have a failure sometimes....
The last thing I need or want is more horsepower, but I wouldn't mind better fuel economy. That's why I am looking at the van aaken. Is that the same thing that is referred to as a wire???
01-10-2006, 10:04 PM
#34
Registered User
Join Date: Mar 2003
Location: TX
Posts: 923
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Don M
That is 4 cylinder pump. Ours has 3 plungers and cam followers.
Don~
Don~
This is actually a 6 cylinder pump.. but must be a lower HP application... I don't remember the size of the plungers.. (The 6 lobes on the cam ring..) I think its used up to about 250-275hp.. but on a 6.8L engine.
Bryan
01-10-2006, 10:13 PM
#35
DTR Advertiser
Originally Posted by JDGnut
Don,
This is actually a 6 cylinder pump.. but must be a lower HP application... I don't remember the size of the plungers.. (The 6 lobes on the cam ring..) I think its used up to about 250-275hp.. but on a 6.8L engine.
Bryan
This is actually a 6 cylinder pump.. but must be a lower HP application... I don't remember the size of the plungers.. (The 6 lobes on the cam ring..) I think its used up to about 250-275hp.. but on a 6.8L engine.
Bryan
01-11-2006, 06:26 AM
#36
Registered User
Thread Starter
Join Date: Jun 2005
Location: Colorado Springs, CO
Posts: 781
Likes: 0
Received 0 Likes
on
0 Posts
there is a bosch warehouse about 47 miles from my house and i took a trip out to the warehouse and that is were i filled out the paperwork to get school info in the mail. They send you a pamplet in the mail with a list of schools and the prices of each. there are schools all over so you will have to look in your local area for info. I am blessed with the fact of the warehouse being so close because i can get parts faster and cheaper... due to being local......
01-14-2006, 10:46 PM
#38
Registered User
Join Date: Oct 2003
Location: Olds,Canada
Posts: 694
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Mike Holmen
So which parts typically fail in the VP44 pump? I heard that lately there is more electronic failures than actual mechanical failures.
01-15-2006, 05:02 AM
#39
Administrator / Scooter Bum
You will hear the term "Fed-Ex Pump" used when discussing replacement VPs.
From what I've been told, it's the standard mechanical components coupled with better, stronger, and vibration isolated electronic components for better survivability.
From what I've been told, it's the standard mechanical components coupled with better, stronger, and vibration isolated electronic components for better survivability.
01-15-2006, 07:44 AM
#40
Banned
Join Date: May 2002
Posts: 267
Likes: 0
Received 0 Likes
on
0 Posts
pump
Originally Posted by bgilbert
Having to spend your money twice does not equal saving money 
.
.I thank you guys for giving me advice, but I wont to give the guy a chance, if he makes a mistake I can live with it. Life is all about choices. Perhaps he will have a shop of his own some day or at least try. Jimk
01-15-2006, 09:53 AM
#41
Registered User
Join Date: Sep 2005
Location: Ft. Rucker, AL and Savannah, GA
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by greenworks
Reports are saying that the electronic computer is failing due to repeated heat and cooling cycles, and not like the early version with mechanical problems, however UPS had a modified elctronics much like the blue chip vp that is proving to be very reliable
01-15-2006, 01:12 PM
#42
Registered User
Join Date: Oct 2003
Location: Olds,Canada
Posts: 694
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by jrkerns
has anyone tried to run a pipe or hose to the vp-44 electronics package kinda like a ram air intake to keep it cool? or better yet, scince i don't use the air conditioner...
01-15-2006, 10:17 PM
#43
Registered User
I was going to stay away from this post, but I must chime in on the electroncics aspect only.
Vibration is the big culprit with most solid state elctronics. And there is not a cheap fix. There is a process called "reflo", I know a retired professor that developed it. Apparrently, when space vehicles come back from orbit, they shake nearly to pieces, and many electronic parts temporarily fail...They have always had to make their electronics bulletproof. He explained to me what reflo was, and how they did it, but I didn't pay attention. I can only remember it is expensive to do and that is the reason he only services space and aerospace. But he says there are a lot of knock offs that try to duplicate him also.
In my studio, the only parts that fail are due to heat or misuse, because there is no vibration to speak of. When things are made right, and the instructions are followed (with respect to space for cooling, etc.,) things do not fail. You can nearly always trace a failure to someone turning something on before plugging something else in,..someone placing things too close together without the proper clearance for cooling,..someone using something for other than the intended purpose,..someone trying to get "more" out of something that they are supposed to.
The only one out of the above that jives...is the vibration thing. Nothing else makes sense...However, I have never seen one in person so definitely will say it's just a guess. I know there was a particular laptop (presario 2700) that they made where there was a problem with the power jack on many of them. (this is not a repairable part...they just replace the complete motherboard for way too much money). I took mine apart when it happened and saw that whoever was running the soldering assembly line in china for that particular thing had forgotton to have them solderall four of the pins on the power jack...one was left in the hole with no solder....so no matter what, sooner or later, nearly every one is going to fail that came off that assembly line.) I resoldered mine for free. And a half hour time.
I am still so ticked off at compaq I have not purchaced anotyher one of their laptops.
Anyway, stuff like that can happen with ANY electronic thing. Thats' why I'd like to see the electronics of a VP44. People do awfully stupid stuff sometime when they are in their little tiny micro world of soldering one tiny pin to the next...not knowing if it's going on a truck, or a fisher price toy.
By the way, I don't EVER remember an electronic failure that you couldn't "smell" the failed part if you looked hard enough. They always smell like burned electronics..... Something gets pushed to hard and there is a short or an arc and kaboom.
Vibration is the big culprit with most solid state elctronics. And there is not a cheap fix. There is a process called "reflo", I know a retired professor that developed it. Apparrently, when space vehicles come back from orbit, they shake nearly to pieces, and many electronic parts temporarily fail...They have always had to make their electronics bulletproof. He explained to me what reflo was, and how they did it, but I didn't pay attention. I can only remember it is expensive to do and that is the reason he only services space and aerospace. But he says there are a lot of knock offs that try to duplicate him also.
In my studio, the only parts that fail are due to heat or misuse, because there is no vibration to speak of. When things are made right, and the instructions are followed (with respect to space for cooling, etc.,) things do not fail. You can nearly always trace a failure to someone turning something on before plugging something else in,..someone placing things too close together without the proper clearance for cooling,..someone using something for other than the intended purpose,..someone trying to get "more" out of something that they are supposed to.
The only one out of the above that jives...is the vibration thing. Nothing else makes sense...However, I have never seen one in person so definitely will say it's just a guess. I know there was a particular laptop (presario 2700) that they made where there was a problem with the power jack on many of them. (this is not a repairable part...they just replace the complete motherboard for way too much money). I took mine apart when it happened and saw that whoever was running the soldering assembly line in china for that particular thing had forgotton to have them solderall four of the pins on the power jack...one was left in the hole with no solder....so no matter what, sooner or later, nearly every one is going to fail that came off that assembly line.) I resoldered mine for free. And a half hour time.
I am still so ticked off at compaq I have not purchaced anotyher one of their laptops.
Anyway, stuff like that can happen with ANY electronic thing. Thats' why I'd like to see the electronics of a VP44. People do awfully stupid stuff sometime when they are in their little tiny micro world of soldering one tiny pin to the next...not knowing if it's going on a truck, or a fisher price toy.
By the way, I don't EVER remember an electronic failure that you couldn't "smell" the failed part if you looked hard enough. They always smell like burned electronics..... Something gets pushed to hard and there is a short or an arc and kaboom.
01-16-2006, 04:20 AM
#44
Registered User
Thread Starter
Join Date: Jun 2005
Location: Colorado Springs, CO
Posts: 781
Likes: 0
Received 0 Likes
on
0 Posts
well i have an idea... on big huge servers in the military we run die-electric silicone which we would literally stick like 2 - 3 inchs of it globbed over the entire circuit board so the fans that cool the system dont voberate something loose or wear othe connections out.....this solved our problem
Thread
Thread Starter
Forum
Replies
Last Post