Ocmechanx

What all is there to cutting DV's?

Just as simple as cutting the shoulder down to shaft size?

Or do you have to change the displacement? (make slots in sides bigger by taking away material)

Or a combination of both.

And who has done this and actually run them in their trucks?



Hoping this will be an interesting thread, as tonight I'm having a machinst at a factory cut the shoulder off a set of 151's I had layin around in another old pump.

Just wondering how this has panned out in the past for anyone, or if I should pack a camera and a fire extinguisher when I try these

95ram12v

I am really interested in this as well, I have a machining backround and access to many machines and would be interested in machining some once we find out the correct process. Im new to 12vs and havent dove into the pump more than to do a plate and gsk swap, this is going to be a great thread. hopefully people are not keeping all their performance secrets.

thewished

Sounds good to me but I am clueless to what "cut" really means...

jumping on this thread till it dies

Ocmechanx

Well if nobody else has any input, and the diagram I threw on the back of a napkin and stuck in the zip lock and sent with my uncle is clear enough to read I'll let ya know what happens. (granted I don't blow myself up,...but I'll try to get pics then)

Heck you can even have the original specs

displacedtexan

I believe 12valve cut some of his own...

one54ton

very interested...more info please!

Ocmechanx

And he didn't blow himself up..............catch sumthin on fire, or any other bad day makers in general?.....lol

Hopefully he'll chime in and clear up the haze for me.

Ocmechanx

Uncle text me this morn when he got in before I woke up, said he'd got them done.

I might not be able to get them on today, and tom I gotta recert for my ASE's so hopefully tom night I'll be able to try them.

I'll try and get some pics up too.

But by all means if anybody can answer any of those ?'s up top it would still help my understanding or any other information on the subject.

I think everybody one here knows what DV's are but not exactly how they work, just tryin to figure it out myself and figured it would interest a few others.

Thanks

displacedtexan

He's alive I can't remember exactly how it worked out... Here is the thread-

https://www.dieseltruckresource.com/...ght=cut+valves

Ocmechanx

Yea I was that last night before I posted(helped me out), hopefully we can get a few more of the how it works answered.

Like the removing material from the X to increace the volume, and what cutting the shoulder down acctually does.

Txwelder

I inquired about this on another thread. I posted a picture of some different options on DV's and it was explained to me that the only difference in the ammount of the shoulder that is removed. I have intentions of just chucking them up in the lathe and removing X amount of material. Hope that helps. To check the thread: https://www.dieseltruckresource.com/...d.php?t=187278

Ocmechanx

Thats what I've got too as far as the shoulder from everybody I talked to but all of those statements ended in I think or to the best of my knowledge, but it just doesn't seem right as the 022's are tapered at the bottom and they all have diff amounts of material (grooves cut deeper/longer), there has to be some reasoning behind that.

Probly if I fully understood how the DV's metered the fuel(how they worked) it would help alot.

Anybody know the finer points or how an inline pump works? Specifically the delivery valves in conjunction with the rack? I think?

MikeR

I tried getting a machine shop to cut some for me. They gave them back to me stating they were hardened, and were too small for their machine. By the time I figured the machine shop cost for dealing with a hardened metal, it's just cheaper to buy them from the vendors.

But you have to have those perfectly cut and balanced as far as flow, so your fuel flow and pressure will be equal to each injector. You're screwed if you get the flow off balance.

Ocmechanx

Well got them in and well it worked, machinist did say something about them being hardened but he could still cut them.

And it only cost bout half of what it does most places.

but it worked no explosions fires ect bad day makers.

did have trouble with my return line washers leakin due to the dern injectors being loose, after that smooth sailin.

So if anybody wants to try some I know a guy who can get em done.

Don't have pics right now but I used a spare set of 151's I had and so far they seem to work as advertised.

Ocmechanx

Sorry bout the wait.

This is the only one that turned out very good.