P-pump Delivery Valves- Upgrades

[RacinDuallie]

Anyone doing this mod in their p-pump? I hear of guys swapping and changing and swapping yet again to yet another set, all in tuning their set-ups. How about sharing your findings?

And which one's you end up with that performed the best?

Are they 181's?

Are they 191's?

Or better yet the laser cut gems?

And here's another to add to the above-

While you changed and swapped did you swap injection line sizes too with each set?




P-pumps gotta love em for their tunability

[Bobcat698]

I have Scheids LASER cut delivery valves..

Here is a pull with stock dvs STOCK DVS
Here is a pull with laser cuts: LASER CUTS

I personally like the laser cuts better!

[oldsmokey97]

how much more fuel do lasercuts flow over 191's???

how much more power will they give over 191's???
I have 191's in my '94 right now..... im just wondering.

[RILES]

191 DVs 12.24 @ 113.83 mph #2 only, 191 DVs 11.94 @ 117.61 mph NOS. Lazer cut DVs 14.78 @ 87.21 mph #2 only Lazer cut DVs 11.50 @ 123.02 mph NOS.

[12valve]

rifles? why that difference from 191 to lazer cuts:
fuel only: 191s are better
with NOS: lazer cuts are better...

lazer cuts 14.78 seconds? 191s: 12.24

explain please?!

[RILES]

With the lazer cuts, it was dumping so much fuel it was putting out the fire

[moneymaker44]

AH see i knew if i search i would find an answer !
so i will go with 191 DV's
should i change the injectors at the same time ?

[moneymaker44]

022's ? ok i read where you have posted on those where do you find those

also do you recommend injector upgrade or can you run the stock sticks with them until you can upgrade.

[RyanB]

Originally Posted by Smokem

I got mine from Piers, but they are a little tough to run by. Most people run 191's or Laser Cut's because they are cheaper, the Laser Cuts are factory delivery valves, often 131's, that have had the shoulder machined off to add volume. You can run any delivery valve you choose, then later add a set of 435's or DDP 4's.

I have heard of the 131's being machined on a 3-jaw chuck...does anyone have any pics compareing the lazers wtih the stockers? I have a set of 181's and am probably going to be jumping up now that I have larger injection lines and my 5x18 injectors

Ryan

[RyanB]

Hard to see what your talking about. Anyone have a comparable pic of a stock set so we can all see the difference?

RyanB

[12valve]

Originally Posted by RILES

With the lazer cuts, it was dumping so much fuel it was putting out the fire

is that because you already have a HIGH flowing inj pump?

how would the lazer cuts do on a normal 215 pump, thats never been bench flowed in a injection shop? only a plate, GSk and so...
and i have 435 injectors and a Htb2 64/14 turbo. at 5000 ft elevation!

or would i get more eficient power out of the 191's

[12valve]

Originally Posted by Smokem

Keep the 181's.

so whats next? i need more fuel! and why souldnt i go with bigger dvs?
i have an HTB2 on my 95 dodge and 435 injectors, 215 pump!

[12valve]

Originally Posted by Smokem

Bigger injectors or more pump tuning. 800hp has been done twice with 181 delivery valves. I would go with 022's before laser cuts, but on the 913 pump you will just overflow the 435's.

Bigger injectors? are the 435's holding back from smoking? i thought it was the pump!
you mean lazer cut DVs will be too much fuel for the 435's? might be tru! where can i get 022's?

Jr adkins just told me for $250 + cores
Puredieselpower has lazer cuts for $275, i think! no cores!
where do they have 022's and how do they compare to 191, 022, & lazer cuts?

[DONK78]

Originally Posted by 12valve

Bigger injectors? are the 435's holding back from smoking? i thought it was the pump!
you mean lazer cut DVs will be too much fuel for the 435's? might be tru! where can i get 022's?

Jr adkins just told me for $250 + cores
Puredieselpower has lazer cuts for $275, i think! no cores!
where do they have 022's and how do they compare to 191, 022, & lazer cuts?

I have been comtimplating the same thing myself, more fuel. What I have now come to realize though its about more efficient fuel. I am using 191's and will probaly stay here. I was givien this anaolgy, if you are trying to fill a coffee cup as fast as possible, using a five gallon bucket full of water think of all the and excess fuel going every where and not to think about half of the water going in the cup will not stay there and will slosh itself out. My suggestion would be to try a honed injector first and maybe a 191(dynomite diesel has some of the best), Some of the bigger horse power guys get more cc's of fuel injected in the right place using these that overly sized stock injectors. If you haven't increased your timing yet than will also help, I have a very similar set up and to tell you the truth it was like night and day!

[12valve]

can you tell me what the difference from 181 to 191 is? in your truck?

should i go with them? how much are dynomite diesels 191's?

[oldsmokey97]

from what i have heard............... the 435 are much bigger than the Marine 370's and have the potential to puch a LOT more fuel. Chuch from neweradiesel.com told me that the 435's are about 55 horse over marine 370s with the correct amount of air.

[oldsmokey97]

Nope. But it would be awesome if ya could find out.

[jambbii]

I wish I would have taken a pic of my 191s next to my 131s. I had the 191s out today and I have a spare set of 131s laying around.

[12valve]

the 435's are EDMs not honed!

and what are the DV holders?
Smokem, can you please explain what the difference is between bigger holders and stock ones?

[jambbii]

Dumb question, what are 435s? Havnt been able to find out about this injector.

Thanks