Can you switch the pump off a 94+ Cummins onto a 93? Is this the only real difference between a 98 and 93? Is this an okay thing to do? I have a 93 as well, and one guy want to buy it maybe, and wants to know if it is possible to get the HP numbers out of a 93 that you can out of a 98 12V?

 

The 94 up pump is refered to as a P-pump. I have seen photos of them installed on a first gen truck. Im considering doing it myself.
I believe you will need the inner timing cover for the P-pump to bolt to. You will also have to relocate the fuel filter because of interference with the master cylinder.
It might be better to find an old 94 up engine and rob the parts of it or build a 94 up engine and put it in your first gen.
Good luck.

 

So I could probably call up a "lower 48" diesel shop and order up everything I need?

 

You may have difficulty doing that. unless you know exactly what you need, most shops wont know the convertion. Cummins does not like the mix and match game. You may call some performance places like Piers or ATS.
Buying the pieces individually may get expensive. It would be best to find an old 94-98 engine that is worn out and use the pieces off of it.
Then you have the problem of finding a worn out Cummins That doesnt happen too often.
Good luck

 

Ya- see my post on a possible conversion of an old 64 four door step side air force truck? I will want to bomb the motor a bit, and put a NV vs the Getrag in it- lifted and stacks and 38s- will be a sweet truck- but while everything is out in the open and on the engine stand- best time to bomb stuff! LOL

 

You need the timing cover, injector lines, injectors, plus the pump and its gear. The newer trucks also have a different cam, and I believe that the actual cam gear is slightly wider, but you might be able to run the old cam gear.

All new parts from a shop is in the $2k range, aparently.

I figure that when my VE pump dies I will do the conversion if I can afford it.

 

The '94 and up engines also have a redesigned head and intake elbow that flows more air. I'd suggest just finding a newer donor since you want an NV4500, it'd all be simpler.

 

Hmm- ya, I think I may use the first gen motor to bolt every thing up- then put the motor and tranny up for sale to recoup the cost of the 94 up set up!

 

There is also the issue wether the second gen nozzles will go in a first gen head.
I agree it would be best to go with a complete second gen engine.
I personaly want to go with a P-pump 24 valve engine in my first gen

 

The "small hole" head, used on the '91.5 and up trucks is the same, I believe, as the 94 & up heads, just minus the notch for the P-pump. The flow change was made when they went to the smaller nozzle bore on the injectors. The late model injectors will bolt in, but the injection lines for them are smaller in diameter (fuel flows at higher pressure).

I am with you Frostie!!

 

So the 93 heads are the same as the 94s?