Engine/Transmission (1998.5 - 2002) P7100 on a 24V?

[EMD-Run8]

Well, a search shows that several guys have done it but not much seems to have been said as to how any of them like it. I have to say I'm really curious about it. With the ULSD fuel coming I was wondering how the VP44 will hold up and that got me thinking about P-pumping a 24V and how well (or lousy) it would work.

 

[craigS]

Is there a write-up anywhere as to how and what is required to swap?

 

[RonA]

If you check over on diesel truck resource they have several threads on the subject. My truck has been converted, but I don't recommend it for most people. It is alot harder to get a good p7100 made up than it is to get a good vp-44. If you run across a shop that gets it right the first try, send me a pm.

 

[EMD-Run8]

I'm mainly curious about it more than anything right now. I have already talked with one noted TDR member by PM who has much P7100 experience on a 24V and he advised to stick with the VP44 for an everyday driver. I wonder though, if it drives like a 12V or better, then what's the big deal? I already had an '04 and my dad has a '00 and had a '92 before then so I'm well aware of how they all behave on the street. None of them were bombed except for exhaust though so maybe therein lies the problem.

 

[9 Lives]

I would be curious to find out just how different the drive is with the P-pump.

What changes? can you really mess with the pump if the truck is run off mainly electronics?

 

[EMD-Run8]

How does your's drive Ron?

 

[RonA]

If you change to a p-pump the fuel shut off is the only motor control that is electronic.

I never had a vp on this motor. It was removed before transplant. It drives the same as the old first gen motor. Not quite as smooth at idle, a bit more power through the entire range. You just can't select your power levels as easily as a vp.

 

[EMD-Run8]

Thanks much. Oh yeah... ... ... ... I'm trying to figure how to attach the smiley at the top of the thread to my sig. Any ideas? Saw it on "cumminsforum" and thought it was cool.

 

[EMD-Run8]

Another question I had was this... ... ... an '02 has a crank sensor that drives the tach right? So the tach would still run in the "smart dash" right? Any other worries along that line? Oh yeah, truck would be a 6 spd so not TPS or PCM to worry about right?

 

[EMD-Run8]

OK. This subject is coming up again for me. Here's what I'm lookin' at. My current '98 is a d#*% good truck. I like the "nuts & bolts" aspect of it but it has a little salt damage that really isn't bad, but I don't feel like messin' with it. So, I want a good "nuts & bolts" truck and am looking for another '98 or even as far back as a '95 in clean shape. I will go as new as an '02 'cause I can P-pump it if I HAVE to. Don't get me wrong, I don't mind new gen electronic engines (an Audi Q7 V12 TDI would be nice) but I would really rather have at least one vehicle in my driveway that DOESN'T have to rely on all that crap. I've just had too many experiences with weird stuff happening with cars of various makes that shakes your confidence out on the road ya know? Just the other day my wife's Odyssey would turn over but not start until I turned it back off and reinserted the key. Then later the cruise wouldn't work and I had to shut it off and turn it back on. The car doesn't even have 100k on it! What's next? T#ts up? Anyway, I'm ranting----sorry. I would like to have a truck to build and hot rod a little. Obviously, a '95-'98 would be easy enough but what about a '98. 5 to an '02? If the VP craps I'm P-pumpin' it------that's all there is too it. P-pump motors drive just fine for me and would probably drive even better with an automatic. So what do you do if you P-pump a 24V? Retrofit a '98 instrument pod or just use the ECM? I've done some searches and chatted with some well known shops and such. I like the late 2nd gen trucks because they had better interiors, 4 wheel discs, etc. , but a '98 12V is OK too. What's a dieselhead to do?

 

[Batphreak]

What's a dieselhead to do?

And that's the question we all have to answer for ourselves. I'm of the opinion that 98. 5+ trucks are going to need the VP replaced at some point. The new pumps that guys like II and Blue Chip are building seem to be a lot better than the originals, I haven't heard very many stories of guys that replaced the VP and updated the fuel feed system (glacier, FASS, or other) replacing the VP again. I know there are those that have gone through multiple VPs, but all the stories I've heard of that are a couple yeras old. 3-4 VPs can usually be purchased for the cost of 1 p-pump conversion. So, I guess if I was in your shoes I'd find a nice early '98 or older to fill the non-electronic bill.

 

[Reb.B]

if you have an auto, i would be a little scraed to do the conversion. If the truck is a 98. 5 -99 its not s aproblem, but trucks 00-02 are a lot harder to do the conversion, especially autos. I've done 24v p-pump conversions and 12v conversions. The best way in 98. 5-99 is to change the computer and wiring haarness to a 98 12v computer and wiring harness. Its the best way, but not the cheapest way. 00 and above get more complicated and usually guys with those trucks that do the conversion have lots of little problems. Trucks are a commodity. If you don't like it find the one you want and sell yours. Its a lot easier and cheaper that way.

 

[massdiesel]

Emd, we have done a few of these conversions,Give me a call and i can answer all your questions if you would like. It has some pros and cons. 508-660-7093

 

[SSabick]

What are the chances that we could upgrade to the common rail, and get one of those modded CP-3 pumps? Is is impossible? Or just too costly?

 

[Bpostel]

J. R. Adkins done my conversion and I couldn't be happier. He got it right the first time. No regrets here.

 

[EMD-Run8]

Thanks Scott, I might just do that. I'm almost done with my house and I'm debating about what to do. I think the 6. 7's are gonna be good engines but I'd really like a good "nuts & bolt"s truck and save the hi-tech for that Audi Q7 V12 when I have a spare 80-100K laying around----------yeah right! :-laf

 

[DieselTim]

p7100-24v

I am nearing the end of my conversion on my 98. 5 24v. I have done almost all the work myself with help from my Dad for 2 days of the conversion. It is something that can by done by anyone that is mechically inclined. I have about 50 man hours into this project, I think with air tools and past experince it could be done in about 20 hrs or less. I do highly recommend having a parts truck to get bits and pieces from. I bought the fuel lines and spacer plate, but the rest of the project came from a donor truck with a broken frame. I have a few more little ends to tye up but first impressions Oo. I LIKE IT. It has way better throttle response and revs really quick. I will be happy to post pics of this built-up as soon as I can get them posted I will post a link, I did take lots of pics of everything including how to set the timing with a deg wheel on the crank. Best of all there is never going to be a VP44 &(^*&%&^$ on this engine to quit on me again. For those wanting to do this conversion on stock of almost stock trucks, I would say go for it. As long as you use the smaller injection lines . 084 then it seems to idle fine with no loping and nice quick revs. I have stock injectors, stock 3" exhaust for now, with the timing set at 17 deg. I will post more later after I get it on the road and drive it a while.



Dieseltim