DV numbers

Chevycummins

Bad case of Tinkeritis!
Joined
Jul 15, 2008
Messages
3,488
i have seen several threads about the numbers 191, 181, 131, and 121.

i am curious as to if someone has some flow charts or something that might indicate actual numbers to see what would be the best instead of just someones voiced opinion.

even though everyone has a 160, 180, or a 215 pump everyone has better luck with such and such when someone else has better luck with another one.

i just stumbled across a bosch ppump tonight thinking it was just a regular off an 8.3. but it has a different style DV holder and had 123 DV's. the holders or what you want to call it that takes the special socket to remove cupped over the DV its self. it was just different the pump number was 750 if i read it correctly (third set of the three group of numbers). i will try to get some pics of it tomorrow to make it a little more clear as to what i am talking about.

i know we got ppl talking about flow rates and stuff on turbos and what not just thought it would be interesting to see about what a DV does at say 45 psi fuel pressure.

also what about the ones like the 121's or even the 123's i found tonight with the taper on it. from what i understand from weston is that it helps the flow and makes it a little smoother cause it gives it more of a transition in the to fuel line instead of having the flat bottem that it would just hit and cause imo turbulence. has anyone ever tried to taper their own dv's. would it be worth it?

i know they have shorten the shoulders and even ground it off to make the LC's or Full Cuts. what about putting a taper to it and smooth the cycle out even more? would it even be worth it or the time to even do so?

i have seen that weston is designing his own style of DV and would love to see the final results on it too. it looks promising and has potential.

sorry for the long one i just looked at a pump setting at the shop took it apart and found that different style of DV and just struck up my curiosity of other things to do with them and decided to ask questions.

thanks

michael
 
Just think this has been beaten to death, hence no replies. Like Weston's said, there's just not that much difference in the fluted valves available today. I will say the 022s I now have seem to smoke more and perhaps make a tiny bit more power for me than the 191s I previously had.

There are new things coming, just be patient as it's quite possible they will be worth the wait!
 
All I know is this...

Talking about DV's keeps me thoroughly confused, yet entertained.
 
sorry didnt get any pics of the ones i came across the other night been busy with work.

i know it might seem like they are beaten to death around here but when a pump is set up to flow say 500cc is that with the dvs that it has in it or what?

thats kinda what i a was getting at on this somewhat.
 
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