bigger head.what about the shim to adjust k(or kf)setting?and timing advance?

[carrizog60]

hi i am going to buil my own pump and will add a 11mm pump head out of a land rover tdi.
will swap all the head parts,aaz delivery valves and aaz camplate.

questions are:
-wont we need to adjust the shim that goes on top of the plunger?or using stock camplate the setting doesent change(as i thing all plungers have the same height?)

-the 11mm delivery valves from the tdi head will need to be swapped by the aaz ones?what happens if not replaced?

assuming that they are larger wont that give a lope idle?or is just the lines that are swapped on big diesel to have lope?

-should i use the aaz pressure control valve,the land rover one or a 1.6 one(i have one running 1.6 pump right now and at the end it must also run)

what else can be done to achieve more advance than changing shims,springs,+ clearance on the piston cap?

grind the pump wall to allow + travel?

does it make difference schimming the main spring on governor solid or just half its spring size?

any more tips?

thanks

[rallydiesel]

Good questions. I think Hey and 410 could probably help with the shim questions, if they still check the board.

[mtrans]

what else can be done to achieve more advance than changing shims,springs,+ clearance on the piston cap?
grind the pump wall to allow + travel?

Why do you need so much advance,if you do more advance than good....
I'am also interesting.

[carrizog60]

i dont know if doing that mods is enough to have good advance in high rpm.
so the question...

[RabbitJockey]

u can get a spacer for the advance piston cover, cummins boys use them

[410]

hi i am going to buil my own pump and will add a 11mm pump head out of a land rover tdi.
will swap all the head parts,aaz delivery valves and aaz camplate.

questions are:
-wont we need to adjust the shim that goes on top of the plunger?or using stock camplate the setting doesent change(as i thing all plungers have the same height?)

Your K setting should stay close to what it was before.  It's important to make sure the plunger doesn't come close to the plug on the head at the top of its travel.  The plug on the head is fairly easy to remove with a pair of channel locks.  It's not the right tool but it works.

-the 11mm delivery valves from the tdi head will need to be swapped by the aaz ones?what happens if not replaced?

I normally use the delivery valves to match the injectors you're using.  Delivery valves are quite different in design for direct injection compared to indirect injection.  Also the injector lines will fit better.

-assuming that they are larger wont that give a lope idle?or is just the lines that are swapped on big diesel to have lope?

I've noticed bigger injectors seem to have the greatest effect for a lopey idle.  Going to an 11mm head might also give you that lopey idle.  The delivery valves and lines have little effect on this.

-should i use the aaz pressure control valve,the land rover one or a 1.6 one(i have one running 1.6 pump right now and at the end it must also run)

I use the pressure control valve that matches the head and rotor assembly you're using.  Although I have been able to adjust the pressure control valves from mismatched pumps to work well.  I would start with the land rover pressure control valve and see how it feels.  I've used both the aaz valve and 1.6 valve with an 11mm head with no troubles.

-what else can be done to achieve more advance than changing shims,springs,+ clearance on the piston cap?

The piston cap can be spaced out with a spacer and then shimming the spring the same the same thickness as the spacer.  You can make your own gaskets for the spacer since there is hardly any pressure on this side of the piston.  Or since you have an aaz pump, you can transfer the advance assembly to the 1.6 pump.  The aaz advance system has all the advance you will ever need.

-grind the pump wall to allow + travel?
I haven't found this to be nessacary

-does it make difference schimming the main spring on governor solid or just half its spring size?

It makes a big difference just shimming half the main governor spring.  The plunger will probably float on the camplate before the governor starts backing the fuel off.  I prefer to leave the governor springs alone.  I like having a governor.
-any more tips?
There is a bleed port on the governor shaft that gets covered when governor lever is in a high load position.  Setting this bleed hole properly advances the timing under high load conditions really improves power and reduces smoke.
Good luck.



thanks

[carrizog60]

thanks for the input!

plans are to use the 1.9 pump,so acording to what 410 said,advance will be good.
might use the land rover timing piston cover as it is way bigger than aaz one,will take a pic later.

i prefer the 1.6 pump spring assembly(single spring),but the 1.6 pump is easy to sell...

There is a bleed port on the governor shaft that gets covered when governor lever is in a high load position.  Setting this bleed hole properly advances the timing under high load conditions really improves power and reduces smoke.
Good luck.

how can this be adjusted?what are the position to look for?

[410]

There is a bleed port on the governor shaft that gets covered when governor lever is in a high load position.  Setting this bleed hole properly advances the timing under high load conditions really improves power and reduces smoke.
Good luck.

how can this be adjusted?what are the position to look for?
[/quote]
At the front of the pump just above the output shaft there's a lock nut 14mm in size.  This locknut locks the governor weight shaft in place.  Turning the shaft in advances the timing with less load and turning it out takes more load to advance timing.  The best way to check this is with a gauge set up to read internal pump pressure.  When loading the engine up at a fairly low rpm and producing some boost, you'll see a spike in pressure.  Sometimes as much as 40-50 psi.  This is the last adjustment I make since most other adjustments affect this one for example; the lda and fuel screw.

The lda is the other hidden gem to these pumps.  Smoke control especially with an 11mm head becomes pretty important and the lda can help a lot with this.  Once the lda is setup properly the car will have a very noticeable powerband with hardly any smoke.

[carrizog60]

i have a 9mm gtd pump right now,with very agressive cut on lda,and full fueling on the screw,and the passat in normal driving doesent smoke.with 11mm will see 
i hate smoke,but sometimes we cant avoid it on high hp goals...

410(and others of course) i dont have a form of measuring internal pressure,so when changing all the bits to the pump should i stay with that shaft untouched or should i give it a twist or two just to be safe?in or out?

here´s a pic of the advance piston cover,2 land rovers pumps,but the roght has lda cover like aaz and left a bigger cover.
not seen on pics but the shaft is also diferent on the left pump,same diameter but has something attached to it...


thanks again,this is why i love this forum...!

[carrizog60]

how in the hell do you remove the internal pressure regulator?
mine is very tight and i cant get it to move with the tools i have...
do you fabricated yours?pics of it?

what about that cover on the timing advance?did you ever seen it?

[mtrans]

Go to FAQ samething about tools.

[carrizog60]

cant find it...

[Smokey Eddy]

a real soft spring there to replace the one the pump would have come with also increases the advance curve.
my pump had the softest spring bosch made the pumps with and a shim. I removed the shim and kept the same spring. (its green)

[truckinwagen]

that green spring is where its at!

solved my advance issued with my cummins pump(along with machining the cover for more total advance piston travel)

-Owen

[410]

For the pressure regulator, I took a 12mm six point socket and gave it a squeeze in the vise.  It worked perfect and I still use it to this day.  If you need a picture to see what it looks like just let me know.  I can grab it tomorrow from work.