300tdi turbo tweaks

Have tweaked my fuel pump as has been suggested.

What about turning up the boost slightly on the turbo - don't want to go too
far.

How do I go about it - I know bugger all about diesels - always been a V8
man myself.

you need to buy a boost gauge and pipe it up from the fitting in rear
of inlet manifold .

to increase boost you shorten the wastegate rod , a 1/4" length
change will give about 0.3bar difference .

there is a circlip on the pin of wastegate pin which holds the rod in
place, this is easy to remove as it has a u loop in one end .

if you increase the boost by shortening the rod then you need to be
able to pull the rod under some tension so it will go back on the
pivot pin .

300tdi landrover wastegate and rod are under the manifold and difficult
to get at and work on but discoveries i think have wastegate on top of
manifold so are easy to work on .

make sure you grip the rod connected to wastegate diaphragm with mole
grips and undo the retaining nut with a spanner [10mm] before removing
rod itself .

i have actually reduced my boost from 1.2bar down to 0.8bar because i
was using too much fuel and i want better MPG .

if you increase boost pressure then the diaphragm in the injector pump
will probably be pushed down lower thus increasing fuel rate , but you
can also adjust the AFC starwheel under the diaphragm [top of pump] and
screw it in to lower the spring seat pressure of its spring and allow
more fuel in under lower boost pressures .

you can rotate the diaphragm to the 6 oclock or 9 oclock position , ie
towards outer wing or towards servo .

the increase main fuel metering rate you screw in the adjuster located
on rear of injector pump , it has 13mm locknut and a 6mm threaded rod
sticking out with a screwdriver slot in end, it may be covered by a
plastic tamperproof cover but this can be prised off and discarded .

you may well get lots of black smoke from exhaust , to some extent this
can be adjusted by the "smoke adjuster" which is located under the
blanking plug on top of diaphragm housing .
you prise out the 20mm dia ali bung and reveal a 13mm locknut and a
torx style grub screw .

unscrew this to raise the height limit of diaphragm , thus moving the
taper metering rod up and closing the jet orifice slightly .

hope this helps .
make a not of all previous settings so you can go back to them .

realistically boost pressure between 0.8 and 1.2 bar wont show you much
difference in performance feeling but at 1.2 bar you will notice hotter
exhaust temps and will possibly "smell " it when going up long hills .

yes you can adjust everything up so that it goes like stink and does
90mph , but at expense of MPG which will probably drop to around 20mpg
..

cheers.
ian