Disco 1 Bosch VE injection pump.

Any learned gents on here who can tell me which way to rotate the "stop screw" for the maximum fuel setting on a Bosch VE IP to slightly increase fuel delivery, is it in or out?
Vehicle is a '98 Disco D1 with 300Tdi engine.

If its the slotted screw with lock nut on the back of the pump then screw it in to increase fuel delivery.

HTH

You sure its not edc?

Remember 1/4 of a turn inwards at a time and watch the exhaust smoke in your mirror as its easy to make way to much black.

6 and 13mm spanner needed.

lynall said:

You sure its not edc?

Remember 1/4 of a turn inwards at a time and watch the exhaust smoke in your mirror as its easy to make way to much black.

6 and 13mm spanner needed.

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Definitely not EDC, I have 3 spare pumps, re sealed and fitted one to the Disco yesterday noticed that the original pump and two of the other spares had the max fuel screw set identically the same but the one I fitted, when I checked, MF screw was 1mm further in. Could only assume the three pumps set the same were at factory settings, all pumps off '97-'98 Tdi's, engine pulls better but smoke seems slightly more. I'll give it a little time to check fuel consumption before maybe re setting back to std.
Thanks for the reply.

Gazbo said:

Definitely not EDC, I have 3 spare pumps, re sealed and fitted one to the Disco yesterday noticed that the original pump and two of the other spares had the max fuel screw set identically the same but the one I fitted, when I checked, MF screw was 1mm further in. Could only assume the three pumps set the same were at factory settings, all pumps off '97-'98 Tdi's, engine pulls better but smoke seems slightly more. I'll give it a little time to check fuel consumption before maybe re setting back to std.
Thanks for the reply.

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3 spare pumps, I only have two

lynall said:

3 spare pumps, I only have two

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I live in a very small remote area country town every Disco that ever came to the area and broke down/rusted away ended up out on my old mates acreage along with his prior collection of about 20 series LandRovers, (he calls anything other than series LR, poofta LandRovers)
I salvage any useful Disco bits and store them to keep a couple of locals running.
There are only five of us in the district that drive LandRovers, we live in Toyota Land Cruiser country and considered "weirdos" for what we drive, but we just like to be different, for a while I drove both Tojo and LR but I like the Disco, it just requires a bit more work to keep it going.

Gazbo said:

Definitely not EDC, I have 3 spare pumps, re sealed and fitted one to the Disco yesterday noticed that the original pump and two of the other spares had the max fuel screw set identically the same but the one I fitted, when I checked, MF screw was 1mm further in. Could only assume the three pumps set the same were at factory settings, all pumps off '97-'98 Tdi's, engine pulls better but smoke seems slightly more. I'll give it a little time to check fuel consumption before maybe re setting back to std.
Thanks for the reply.

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Just for interest, when you have a chance, could you provide the measurement please?

Would be useful to keep for info in the future if needed.

Also, have you seen the VE pump tuning guide?

Cheers

neilly said:

Just for interest, when you have a chance, could you provide the measurement please?

Would be useful to keep for info in the future if needed.

Also, have you seen the VE pump tuning guide?

Cheers

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I will double check but what I have is 23mm, basically it is a measurement from the 6mm AF top end of the adjustment
screw to the underside of the 12mm AF locknut against the washer face, a picture would be better to show but I don't know how to put photos up.
I have seen the tuning guide but I've always been of the opinion that factory settings are best in an "all round" way, it takes teams of engineers many hours to design and produce a vehicle so I tend not to want to fiddle with stuff that's working.

Corrections; 13mm AF locknut on fuel screw and dimension given as 23mm is in fact 22mm measured as described in previous post.

Thanks @Gazbo

Useful info. Although I like to adjust mine for fun, nice to know if I ever want to go back and lose my notes.

Cheers

Gazbo said:

I have seen the tuning guide but I've always been of the opinion that factory settings are best in an "all round" way, it takes teams of engineers many hours to design and produce a vehicle so I tend not to want to fiddle with stuff that's working.

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I agree. Completely. LR clearly knew what they were doing given the pretty stellar mileages the 300Tdi manages with relative ease. The factory settings are clearly a fine starting point....

300Tdi's did leave the factory in a relatively mild state of tune, with very limited instrumentation ( probably have the bean counters to thank for that ), and can be improved over factory with the right test kit.

I'd suggest that at the very least one would need an exhaust gas analyser, and preferably a four wheel rolling road as without these, IMHO, you are on a hiding to nothing, .... or worse!

Of course, once you go down the mods route, you also need to add the appropriate instrumentation, AND use it !!