could you take out your fuel pin like you take out a plate in a p pump? just wondered if anybody ever thought of it.

 

You can take out the cone, but then nothing keeps the pin that rides on the cone from being pushed out by the fuel pressure, so you get a nasty fuel leak.

The lever that pushes the pin that rides on the cone bottoms out before the pin makes it to the deepest part of a modified cone, however.

 

oh, i just wondered.

 

My buddy said hes not runng any delivery valves, is that safe? he's got stock injectors and a maxed out pump.

 

I don't see what the benefit in it would be. I imagine it would make it perform like crap and be really hard on the pump.

Delivery valves on a VE aren't as significant a restriction as on a P-pump, and it's kinda important to keep residual pressure in the injection lines. Or so say the people that built the things...

 

he says it runs better i just thought he might have problems, because dont they help the injectors work or something, i think i read that somewhere

 

i think it has something to do with keeping fuel in the injection lines.... don't know for sure tho

 

they keep the injectors from dripping fuel between injections. without them it could cause detonation.

 

thank you knew there was a reason just couldn't think of it

 

that's actually false. the injectors are held closed by spring pressure. DV's or not; a drippy injector is an injector problem: not DV problem. the other guys are correct tho. its meant to hold a residual pressure on the lines. only about 200 psi it may be less for the VE as i believe that spec may have been for P style pumps if i remember correctly... i kind of slept alot thru my diesel performance and diagnosis class. this residual pressure drastically cuts down on beginning of injection delay and allows much more accurate injection timing. you dont have to "wait" for the pressure to build. also the DV acts as a check valve and in the closing action of the DV it reduces line pressure for an abrupt closing of the injector nozzle rather than it "bleeding off" until fuel quits delivering which could be considered the "dripping" in between injections that cumminskid was talking about.