Engine/Transmission (1998.5 - 2002) Curious About a Hot Rod VP

[EGaskamp]

I was wondering what the procedure was for changing the VP. Tell me if I'm wrong, but you take the 4 bolts out, pull the gear off the front, take off the fuel lines and some other stuff in the way and pull the pump off. When you put the new pump on does the timing ajust itself since it's all electronic? Thanks guys.



Eric

 

[BradyWilliams]

RE: Installing VP44

When installing a VP44 make sure that you get the key in the key way. Also the arrow on the key points at the pump. If you miss the key you will get a timing code error and you may not be able to replace the key. The key gets smeared in to the key way and can be very hard to extract. Replace the fuel filter with a quality filter. Replace the transfer pump and make sure you are getting at least 13. 5psi and should never drop below 9psi under load. Low transfer pressure will cause the seals on the steel diaphram to fail. Bosch says 9psi and below will cause the seals to fail. It's all about pressure and flow not just flow. I have heard the flow thing lately and it isn't so. The low transfer pressure can cause the steel diapham seals to fail in short order or use. The torque on the drive shaft nut is important and the torque is 120ft/lbs. You will need to bleed the fuel at the injectors or transfer tubes. The fuel flowing through the system not only bleeds the air out but also washes away contamination that may be in the fuel lines etc. Remember 10 micron and above particles will damage if not fail the fuel system components. Thanks, Brady 1-800-955-0476

 

[Gary - K7GLD]

"I love this stuff; I ask a fairly straightforward question and get three answers from two people, one of who contradicts himself!"



Welcome to the tech forums - wait until you ask a real COMPLEX question! :-laf :-laf

 

[bgwhtjp33]

I've been running a HOTROD VP for about 4 months and have no problems with cruise control.

 

[Cummnzpowr]

truck

Eric. . I'll be offended if you don't send pics of it once it's dressed for the strip :{ ... It's nice to know the old girl went to a good home! Almost got her payed off yet?

 

[rubberneck]

So i have a question. I am hearing numbers anywhere from 45-90 HP with a hotrop vp44. So with a hotrod pump on an ETH, you will still make less Hp than an OEM pump on an ETC. Right? Why not put an ETC pump and ECM on the ETH motor? Will it work?

 

[dieseldude]

I have a like new, low mileage late run VP-44 I keep as a spare - I wonder if an outfit like I-I does HRVP conversions on customer-provided pumps, or only on an exchange basis - and what they charge - anyone have an idea?

I have looked into that and it wasn't possible for me the hot rod vp is made out of high output pumps they upgrade the electronics on it and a few other parts.
I had a CA truck w/out the HO option so it was easier to spend the $1600 on indutrial injections HRVP and I love mine.

 

[Gary - K7GLD]

"I have looked into that and it wasn't possible for me the hot rod vp is made out of high output pumps they upgrade the electronics on it and a few other parts.

I had a CA truck w/out the HO option so it was easier to spend the $1600 on indutrial injections HRVP and I love mine. "



My truck is an HO, and so is the spare VP-44 I have.

 

[SpicyJam]

So i have a question. I am hearing numbers anywhere from 45-90 HP with a hotrop vp44. So with a hotrod pump on an ETH, you will still make less Hp than an OEM pump on an ETC. Right? Why not put an ETC pump and ECM on the ETH motor? Will it work?

No you make more than than a ETC pump. When you do the numbers, price wise for a ETC computer, then a ETC pump, the SHOVP is a better deal all the way around. The SHOVP flows more fuel than a ETC pump. The second part of your question is yes when you find the computer it will work. Then all you have left is higher compression... ... ... ... ... . later Jim.

 

[dieseldude]

gary you should give brady a call he will be able to tell you more it might still be easier to just use the spare as a core and buy one that is already done.

 

[Gary - K7GLD]

gary you should give brady a call he will be able to tell you more it might still be easier to just use the spare as a core and buy one that is already done.

You might be right - my only logic in actually upgrading mine is, it appears to be a very late production unit, and might have basic internal upgrades earlier ones did not, and that might further enhance the HRVP mod as well.



That said, I guess my basic question is, in the interest of best quality, lifespan and reliability of a HRVP, does a later production unit core have any advantages over an early one?



But as you say, actually discussing it with Brett or others in the business is the most reasonable way.

 

[SKneeland]

i think the people with the most to gain are those like myself running an HO that are limited to injector size due to pump output. so the pump gains an est. 40-80hp, coupled with the 220hp injectors i can run now.....



in some sick twisted way i keep my fingers crossed that my VP will fail so i can justify the upgrade :-laf

 

[jdooner]

How hard a hit does this pump give you in regards to MPG?

 

[Diesel Nut]

Well, I installed Diesel Dude's pump and his trans is shot, so kinda hard to judge milage diference, but I think he stayed the same, as long as he stayed out of it (yeah,right). He loves his, and for the added durability, you can't go wrong. He has 275 rv injectors, the HRVP44, FASS pump and stright pipe and that truck is FUN to drive! I can't wait till we do his transmission and put a box on it.

 

[EGaskamp]

I'll send pics! The final payoff is still way in the future! It will be strip ready as soon as I get some money!



Eric

 

[dieseldude]

Well, I installed Diesel Dude's pump and his trans is shot, so kinda hard to judge milage diference, but I think he stayed the same, as long as he stayed out of it (yeah,right). He loves his, and for the added durability, you can't go wrong. He has 275 rv injectors, the HRVP44, FASS pump and stright pipe and that truck is FUN to drive! I can't wait till we do his transmission and put a box on it.

me neither

 

[isb360]

My original VP is still working fine (knock on wood) with 132k miles. But I sure do like the sound of a HRVP and will likely go that way if/when mine dies. Here's a question:



I have an ETC truck, and beyond the approximately 40hp extra I would get going to an HRVP, is there any extra reserve capacity for fuel delivery above and beyound a stock VP? In other words, if a certain injector/box combination "max's out" a stock VP, will an HRVP not be "max'd out" with the same combo?



Thanks

Tim