Thread: 2 1/4 ltr diesel

My old series 3 109 was a 2.25 diesel and it was my everyday car. Like most landys you just have to find the power band and try to stick with that. It wasnt great on hills though. One trip out to Condamine it left a smoke screen that would make koalas drop out of trees as we went up the mountain.

Originally Posted by Aaron IIA

I have mounted a york reciprocating compressor (again an old A.C. unit, but reciprocating units have a wet sump, so no lubrication issues) while still using the original 2.25 litre inlet manifold.

As for the pump modifications, I will have to try some of them.
Aaron.

I also have a york. And after about 6 years, it failed me for the first time yesterday (hose blew). I need to get some high temp hose for the first couple of sections, as the air gets quite hot.

Originally Posted by Mick-Kelly

My old series 3 109 was a 2.25 diesel and it was my everyday car. Like most landys you just have to find the power band and try to stick with that. It wasnt great on hills though. One trip out to Condamine it left a smoke screen that would make koalas drop out of trees as we went up the mountain.

The old drop bear generator

Originally Posted by isuzurover

Sorry - missed this...

I did a whole bunch of stuff at the same time (not just pump) - but here is a list:
Fitted Extractors (Lukey Brand)
Removed the SIII "vacuum brake" butterfly - this is a HUGE restriction. Either get a 12V vacuum pump or a vacuum alternator if you have vacuum brakes.
I also chopped (cut and shut) the intake manifold, so the air now enters from the top at the middle of the manifold. This was a clearance thing for my AC (air) compressor, but I believe it may have helped airflow, as the air would be more evenly distributed to all cylinders.
I swapped the crappy oilbath filter for a hilux filter box.

Now the pump mods:
There is a small steel barrel perpendicular to the main barrel of the pump. This is the advance mechanism. Inside is a plunger, ball, and 2 concentric springs. Some people pull the inner spring completely, I removed it and swapped it for a softer one (0.8mm wire instead of 1.1 mm). You can also machine down the plunger, but I am unwilling to do this until I have a spare.
Inside the square linkage housing there is also a combination of 12 different fuelling settings (linkage positions).
I only wanted a slight performance increase, so I have left these alone for now, and am happy with the performance I have. If I wanted to go further I would fit an EGT to make sure I wasn't fuelling too much.
My engione has little-no smoke out the exhaust (except when you really put the boot in, and even then, only a second or two).

I know this is going back to ancient history but I'm considering attempting your pump modifications.
First off, can the average Jo, like me, complete this work? My manual says that the pump unit cannot be serviced and needs to be returned to Rover for replacement. While I realise that diesel mechanics can service these units, is it likely that I could ruin the pump or not have the specialist tools required for the task?
Secondly... got any pictures?

Also, regarding the removal of the vacuum brake butterfly, can you just delete it or do you have to re-route/shut anything?

Thanks.

you can just drop the vac generator off then move the air intake hose onto the manifold and hose clamp it.

anyone who is confident enough to rebuild an engine can do the pump BUT

you really want to understand what all the bits do before you start changing things. Theres a lot of info on the net. Do your research then come here and ask questions.

the consequences of getting it wrong can include blowing the pre combustion chambers out of the head.

Originally Posted by Blknight.aus

you can just drop the vac generator off then move the air intake hose onto the manifold and hose clamp it.

anyone who is confident enough to rebuild an engine can do the pump BUT

you really want to understand what all the bits do before you start changing things. Theres a lot of info on the net. Do your research then come here and ask questions.

the consequences of getting it wrong can include blowing the pre combustion chambers out of the head.

Yeeee Haw!

I've been searching for days for info regarding modification and improvement of land rover diesel pump and nothing relevant comes up. In fact, there's barely anything.

If you could give me a gentle point towards the treasure trove of online information I'd really appreciate it.

try http:\\found lurking in Blknight.aus's roverstuff directory.wow

or check out the attachment on this post. That'll get you started.
2008-10-31_134419_Rotary_Fuel_Pumps_Timing_to_engine_steps.pdf

Originally Posted by Blknight.aus

try http:\\found lurking in Blknight.aus's roverstuff directory.wow

or check out the attachment on this post. That'll get you started.
2008-10-31_134419_Rotary_Fuel_Pumps_Timing_to_engine_steps.pdf

Thanks for that!
I'll get into it.

I am really surprised by how little I can find regarding tweaks to a land rover diesel. Most of the talk seems to be about what to upgrade to rather than improving what is already present.