longer delivery valves

[TPro]

A customer brought me a VE pump to replace his dead one on a '93 1-ton. After swapping a few parts, I installed it on the engine only to discover that the delivery valves are different (a bit longer) than the old ones. Now i seem to remember that Cummins went to different injectors in the first years. I think they went from 9mm to 7mm. Is this why i have different delivery valves? Anyone see a problem changing back to the shorter ones without pulling the pump? Thanx, this is my very fi rst post. tim in texas

 

[Greenleaf]

Delivery valves are the same to my knowledge, but that is slowy loosing ground. The delivery valve holder may be different? Never had call to check into this, sorry.



Call my pump shop and ask. . they will sak you for the last three #'s of the pump. I can give you the 800 # if you like.



When I order new valves I have not had to give the pump's number. That's why I think they are the same, just the holder could be different (???)



GL

 

[bgilbert]

The pump I got from a 93 sure looked the same as my two early nonIC'd pumps. Changed over fuel lines too from the 93 to my 89 for IC install, and had no problems nor seen any difference when bolting up the 93 injection lines to injectors and back of the 89 VE pump. Don't know if thats any help.

 

[dpuckett]

The DV holders are different from the older (nonIC) ones to the later (IC'd) trucks. Injector lines are also smaller diameter on the later ones. I see no reason you couldnt change holders from the old pump to the "new" one, though. Maybe someone with more experience with pump internals can chime in here and clear up the mud.



Daniel

 

[BushWakr - RIP]

Those DV's went together with the larger internal ID injection lines... 2mm ID I believe.

You can certainly try them in the pump and see what you think. There is one or two others running them at this time and I have not heard of any problems.

The only way to tell if they are worth it is to dyno of course but give it a shot.

You will have to "tweak" your injection lines to move them back away from the pump head/DV mount so be careful there.



pb...



edit: this post should have said that there have been a couple others who have TRIED this and I have not heard of any results and you need to change the lines too... . ok, so I'm getting old...

 

[TPro]

thanks for the inputs, guys. I changed the delivery valves over to the "new" pump. It starts and idles fine, albeit a little fast. However, it won't tach higher than 2500. Don't know what's wrong yet. I'll keep you posted. thanks again.

 

[Dman]

Another thought - could the "new" pump be a VE from a different application. That would explain RPM problem. Did you check bosch part number on pump? Put the number up here and I'll tell you what it came from.

Dave

 

[cerberusiam]

If it had different DV's it was probably from a different application and may or may not work correctly depending in the CPL's and how close they were. I did the same thing with a worked over pump from a delivery truck. Swapped the DV's from the holders from the stock pump and had to change the DV's to a setup that would work with the holders. If there is a problem it could be due to the DV's and the washer spacing be correct between the two setups. The pump definitely ran different because of the build for another CPL but it would make plenty of power with some manipulation of timing and AFC. It ran much better with a set of good injectors than with the stock ones. The KSB is where you may have a problem because some of the other applications owrked exactly opposite from the truck applications.

 

[TPro]

Another quite serious problem arose after changing the delivery valves over. the 'new' pump put about two gallons of fuel in the crankcase! Probably a difference in the KSB set-up, a system I'm a little new to. No harm done, tho. He bought a rebuilt VE and it runs fine now. Thanks for the ideas, fellas. Tim in Texas