VP44 wire tap question
Chapter President
Joined: May 2004
Posts: 3,539
Likes: 7
From: Caistor Centre, ON, Canada
Originally posted by HOHN
In other words, if your Comp "causes" the pump to crap out, then it was on its way out anyway.
I lost my VP at 40K with no wire tap! (I was one of the rash of failures)
You either have a good one or you don't. You won't kill a good one by tapping the wire, JUST LIKE YOU WON'T KEEP A BAD ONE ALIVE BY *NOT* TAPPING THE WIRE.
That said, your VP has "worn in" using only a certain range of travel in the slot in the distribution head. When you tap the wire, it will use up more of this slot. In other words, keep the box set low (COMP on 2xwhatever) then slowly ramp it to higher settings after about 500miles on each setting. By the time you hit level 5, you should have had the box on for 2K miles or so and the pump should shrug off the tapped wire.
At least, that's MY theory
In other words, if your Comp "causes" the pump to crap out, then it was on its way out anyway.
I lost my VP at 40K with no wire tap! (I was one of the rash of failures)
You either have a good one or you don't. You won't kill a good one by tapping the wire, JUST LIKE YOU WON'T KEEP A BAD ONE ALIVE BY *NOT* TAPPING THE WIRE.
That said, your VP has "worn in" using only a certain range of travel in the slot in the distribution head. When you tap the wire, it will use up more of this slot. In other words, keep the box set low (COMP on 2xwhatever) then slowly ramp it to higher settings after about 500miles on each setting. By the time you hit level 5, you should have had the box on for 2K miles or so and the pump should shrug off the tapped wire.
At least, that's MY theory
Thank you....well said......I'm not always as clear as I would like to be.
What I'm not sure of in your post is that there is anything you could physically define as wearable in the rotor/slot and pump body since no parts there actually contact each other - assuming of course, that the pump is fine and the tolerances are correct. I know the tolerances are supposed to be quite tight - but no contact, right?
Registered User
Joined: Apr 2003
Posts: 6,564
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From: Cummins Technical Center, IN
Hmm, now you get me thinking (I'll try not to make you regret that, lol)
I'd have to think you are right. I re-read Blue Chip's article on VP failures and it appears that I ASSumed something that wasn't there! I was imputing to the article something it did NOT say.
Good catch. NO CONTACT! (or at least, there shouldn't be or you will have BIG pump problems in 0.000001 seconds).
I'd have to think you are right. I re-read Blue Chip's article on VP failures and it appears that I ASSumed something that wasn't there! I was imputing to the article something it did NOT say.
Good catch. NO CONTACT! (or at least, there shouldn't be or you will have BIG pump problems in 0.000001 seconds).
Thread Starter
Registered User
Joined: Sep 2004
Posts: 607
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From: Elk Grove,CA.
Well pump failure or not I've decided to go for it. The wife got a new diamond
ring for our 20th wedding anniversary. If my pump dies she can buy me a new
Hot Rod Vp44 from Blue chip for my gift.
ring for our 20th wedding anniversary. If my pump dies she can buy me a new
Hot Rod Vp44 from Blue chip for my gift.
Registered User
Joined: Mar 2003
Posts: 923
Likes: 0
From: TX
Originally posted by Dieselcamper
Well pump failure or not I've decided to go for it. The wife got a new diamond
ring for our 20th wedding anniversary. If my pump dies she can buy me a new
Hot Rod Vp44 from Blue chip for my gift.
Well pump failure or not I've decided to go for it. The wife got a new diamond
ring for our 20th wedding anniversary. If my pump dies she can buy me a new
Hot Rod Vp44 from Blue chip for my gift.
Six speed clutchs are a little weak... My VP is about to turn 130K with the wire tapped... (truck at 156K)
Registered User
Joined: Feb 2003
Posts: 542
Likes: 0
From: Salem, Ohio
I am not trying to scare you. I rolled the dice and lost, but I was happy to get 125K out of the original. Just need to be aware of the POTENTIAL risk of the VP laying down on you.
No worries mate!!
No worries mate!!
Registered User
Joined: Apr 2004
Posts: 8,234
Likes: 1
From: Texas/Oklahoma Border
Off the Subject
Quote from JDGnut...
"On the shop floor... DSS and 03 Track Bar Retro Kit."
Bryan, Do these additions to your shop help keep it pointed in the right direction?
Been there a while...No?
RJ
"On the shop floor... DSS and 03 Track Bar Retro Kit."
Bryan, Do these additions to your shop help keep it pointed in the right direction?
Been there a while...No?
RJ
Registered User
Joined: Nov 2002
Posts: 1,766
Likes: 1
From: Tenn.
I connected my wire last year. I didn't tighten one of the aftercooler boots enough and when the boost came up and the boot squealed and popped, I thought I'd killed my pump. After retightening the clamp, no problems since.
You could put in some bigger injectors first..since you'll end up putting some in anyway after the bombing bug sets the hook
You could put in some bigger injectors first..since you'll end up putting some in anyway after the bombing bug sets the hook
Registered User
Joined: May 2005
Posts: 19
Likes: 0
From: Bridgeport Ca
145k on original lift and injection pump, called edge and they said only level 3 and higher puts voltage to the tap, I drive mine on 2x5 everyday and go to 5x5 if i need to pass someone. no probs yet. wire taped for 5 k
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