heres the DV pics I gathered on the net:


and heres what a shop made today out of an extra 131 DV i had lying around

im not using this one, just trying and learning to make 'em and he didnt charge me a penny

 

I tried to do it with a dremil!lol That was funny!! It's hard to do

 

And we all wonder why brandon's truck does the things that it does.

 

lol! In my defense, I never put those in the truck! See, I was kinda nice to the truck!

 

One good deed is not enough to redeem a man of his bad one's.

 

Whats a DV???????????? go ahead let me have it

 

Dangit....i could have done without knowing that one! Buying trucks from your friends is like sleeping with their ex's, it's good but you get tired of hearing about what they did with em. On the bright side I fixed the grinding....turns out it wasn't the tranny, just the snap ring on the output shaft of the t-case was shattered. So not to totally hi-jack, a DV is a delivery valve, it is like a little poppet where the injector lines meet the p7100 pump, as more is cut off it allows for greater fuel delivery. As for cutting your own, if you feel up to it have fun but for the price i'd just buy em.

 

What'd you use to cut it?

 

For what it's worth, the clearances needed inside the DV are tighter than what's available inside a normal machine shop.

brandon.

 

Looks like it was cut on a lathe, what kind of tool I couldn't tell you, but definitely lathe cut with a single point tool similar to a cut off tool.
I agree, looking that the photos, the other ones look like they are ground on a cylindrical grinder, very precisely too.

 

I guess will have to wait and see if he installs them. From the pics the new one looks rough to where the bought one looks smooth but that could be the lighting.

 

I wonder how consistent these would be on a flow bench. I am pretty sure that if you were to cut the DVs down to withing .001, as measured with a micrometer, you would be all right. You would have no way of telling unless you were to test them on a flow bench. I am sure you could get the same fuel delivery from every cylinder, but you would have to adjust each barrel individually to compensate for delivery, but I don't think it would be pretty as far as injection pulse duration. for what they cost, I think that 191s or laser cuts are the way to go.

 

Agreed. Now maybe if they were several hundered dollars I could see, but they are not.

 

I wish I had an old set of 131's, I have alot of grinding equip., and think they would be easy to moddify. thanks

 

i have two none workin ppumps lying around, so thats why the idea!

yeah they are done on a lathe.

1st: its very hard material, he said it only can be done with a diamond bit.

then he heated it up with a torch, he said now the steel is softer. then he could cut it with the bit he had.

my question, can that hard steel be cutted with a diamond bit? sharpmachine? he said a bit costs $150 pay a little more and have the pro cut DV's

any ideas? i dont feel like giving up yet.