flareside_thun
Reviving The General Tao
Geez Mel, that picture brings up not-so-fond memories. I had to tear one apart in diesel class......PITA is an understatement.
ya iirc thats a moose pump teaser he posted a while back but most guys here look at it like a space shuttle they know what it is but dont know how it works
Uh, sorry. Bin Laden is dead! I'll post pics later after I get myself well sauced over the news. Rejoice!
K.... so the fuel system is like a brake system. I guess in as far as they are both hydraulic by nature. So, where is this "Theoretical small piston" in the injector?the pump with a bigger piston creates a force on the fluid which is transfered to the injectors with a theoretical smaller piston creating more pressure.
So does it fire sooner or later? which is it? Ohh, guess it doesn't matter, sometimes you notice it and sometimes you don't. Well, I'm really happy you've cleared that up for me.by changing the length of a line you cause the injector to fire sooner or later sometimes its not noticible other times it is. it is also important to make sure the lines go back to their original cylinders when taking them off a pump.
Oh good, now that you've taught me so much about pump function (ie it's like a brake system, and the lines need to go to their proper injector and need to be the right size I think....),now some easy mod things since you have the basic understanding of how the setup works
"Adjust the screw as I see fit" Brilliant! Thanks!turning up the fuel
this is simple ill do a quick how to here but more in depth can be found elsewhere. first disconnect the fss wire this will make youre motor not be able to start. then on the pass side of the ip there is a small cover its triangular in shape and is held on by 2 small screws. take that plate off.
then turn the motor over (byhand or starter)(hand works best)till in that hole you see a small allen screw. adjust the screw as you see fit. the general rule is dont go more than 2 flats either way without trying it out first. then reassemble and reattach the fss wire and go for a run.
Ok, so just f--k with it until it does what I want? Dang, this pump stuff is easy..... I knew Mel was ripping me off with all this "highly refined calibration mumbojumbo" I coulda just dicked around with my pump "till it runs as I wish"torque screw
this is on 93 and up trucks iirc and it is located above where the lines attach to the pump. now its simple turn bit by bit till it runs as you wish. this will change youre torque curve within the pump.
Nice..... So these two lines are actually the only worthwhile thing said in this post.now i dont recomend messing with timing without having a meter to see where you are
ALWAYS WATCH EGTS WHEN CHANGING ANYTHING ON A PUMP.
Just a reminder guys... keep this level. No personal attacks or name calling. Everybody has an opinion. I think it's naturally curious to want to know more about how these things work, and what a person could do to improve there situation.
No Tom, I don't have any exploded views. There is a web site, and I forget the link, but it has been linked to dozens of times on here that shows you exactly how the parts interact with each other. I'm sure if you search on threads on the DB2 you will find it. Here's the thing, and this is the crux of the problem. Let's say you, me or anybody else here, lets say they come up with some pump that works great. Well, there is no practicle way to duplicate it, because the final result is the end product of tweaking and fooling around with it. You might be able to come up with a recipie for what to do to it, but it's never going to be right, without one of these.
(Pic Deleted)
And I think that is the point Drew is trying to make. The amount of man hours and time a person will have invested in trying to come up with something that works well for them is going to make doing it hardly worthwhile. Personally, I don't like swapping pumps in and out of a truck, and I had to do it enough times getting the Moose Pump created, that just doing those swaps was all the effort I could stand. I was glad I didn't have to add on top of that the man hours that went into coming up with the final product that just plain works. And because my guy has this machine, the recipie IS reproducable time and time again. If you took this machine away from him, he would be just as helpless as the rest of us. Probing around in the dark trying to find the light switch.