M51 diesel into 2 door with LT95

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landyboots

Active Member
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I'm going to attempt this in the next few weeks. I know it has been done before. Can't remember if it was someone on this forum or somewhere else. Anyone on here done it or knows someone who has?.....

Any help as always appreciated....

Thanks.
 
landyboots said:
I'm going to attempt this in the next few weeks. I know it has been done before. Can't remember if it was someone on this forum or somewhere else. Anyone on here done it or knows someone who has?.....

Any help as always appreciated....

Thanks.
Click to expand...
You will need a new EDC set up in "Non Robust Mode" for it to run unless you plan installing a BECM as well:eek:
 
Hoping to avoid electronics. Got engine from an Omega with 120k on clock. I'm going to try and convert fly by wire on injector pump to a mechanical throttle and cable. If successful, it should be just a matter of electric pump to deliver fuel from tank and a solenoid to start/stop engine......Conversion plate for engine to gearbox first though........:eek:
 
landyboots said:
Hoping to avoid electronics. Got engine from an Omega with 120k on clock. I'm going to try and convert fly by wire on injector pump to a mechanical throttle and cable. If successful, it should be just a matter of electric pump to deliver fuel from tank and a solenoid to start/stop engine......Conversion plate for engine to gearbox first though........:eek:
Click to expand...
Better off keeping the electronic FIP, it works well and gives good economy, just need to replace the EDC.
A 2.5 Tddi Transit engine is better.
 
I would prefer to keep the EDC as it gives so much more options on tuning. I love the BMW straight six engine and find it offers good refinement over other alternatives. I'm not after bucket loads of power, just some refinement and smooth delivery through the rev range.....I would be interested to know what wiring is essential to get the engine running. I would still need to convert pump to throttle cable i think.....Any electronic wizzes out there familiar with these engines and their electronics?.....

Thanks in anticipation.
 
landyboots said:
I would prefer to keep the EDC as it gives so much more options on tuning. I love the BMW straight six engine and find it offers good refinement over other alternatives. I'm not after bucket loads of power, just some refinement and smooth delivery through the rev range.....I would be interested to know what wiring is essential to get the engine running. I would still need to convert pump to throttle cable i think.....Any electronic wizzes out there familiar with these engines and their electronics?.....

Thanks in anticipation.
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You cannot convert the pump to cable, you convert the throttle to FBW.
The Transit is smoother and more refind than the M51 which is the roughest 6 I've ever known.
 
A 2.5 Tddi Transit engine is better.
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What? an old fly by wire turbo di.........they were complete junk. An antique pushed as far as it could go.
The m51 is twice the engine the di ever was :)

Or do you mean the 2.4 tddi?
 
What do you intend to do with it ? That horrible BMW thing was never built to power a heavy 4wd,its just a car unit.If you want a smooth six diesel that was made for a 4wd then you need something like the Toyota 1Hz which will be more reliable too.
The BMW unit will struggle badly with the wide gaps in ratio of the LT95,made even worse by its slow gearchange.
You will work very hard to make something that is useless in practice,even the original TDI LR engine cant cope properly with a 4spd box that the v8 could tolerate.
 
EeEk said:
What? an old fly by wire turbo di.........they were complete junk. An antique pushed as far as it could go.
The m51 is twice the engine the di ever was :)

Or do you mean the 2.4 tddi?
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I did say Tddi:p Twin cam pre common rail turbo charged with a flashable ECU. Tdci is more of a problem.
 
eightinavee said:
What do you intend to do with it ? That horrible BMW thing was never built to power a heavy 4wd,its just a car unit.If you want a smooth six diesel that was made for a 4wd then you need something like the Toyota 1Hz which will be more reliable too.
The BMW unit will struggle badly with the wide gaps in ratio of the LT95,made even worse by its slow gearchange.
You will work very hard to make something that is useless in practice,even the original TDI LR engine cant cope properly with a 4spd box that the v8 could tolerate.
Click to expand...

That's got me thinking......The objective here was for smooth power delivery that is refined which the M51 is. I've had a DSE up to recently and was impressed with it's quietness and smoothness, even though you have to rev the nuts off of it to get it to move. I would have thought that the fact it was a high revving engine, with similar torque and hp figures to the V8, would make it a good option?.....
 
landyboots said:
That's got me thinking......The objective here was for smooth power delivery that is refined which the M51 is. I've had a DSE up to recently and was impressed with it's quietness and smoothness, even though you have to rev the nuts off of it to get it to move. I would have thought that the fact it was a high revving engine, with similar torque and hp figures to the V8, would make it a good option?.....
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I have a DSE, as I said it's the roughest 6 I have ever known, my Transit is smooth by comparison and the power delivery is much more suited to powering a tank. Easy to remap too and compact.
 
landyboots said:
That's got me thinking......The objective here was for smooth power delivery that is refined which the M51 is. I've had a DSE up to recently and was impressed with it's quietness and smoothness, even though you have to rev the nuts off of it to get it to move. I would have thought that the fact it was a high revving engine, with similar torque and hp figures to the V8, would make it a good option?.....
Click to expand...
No,because the old carbed v8's started making useable torque from idle and didn't have a turbo to keep spinning.This meant they could cope with a wide ratio 4spd box.I fitted a a 200tdi engine to an LT95 with one of those useless Zeus bellhousings for a friend into a 2dr RRC.He tolerated it for a year then fitted a 5spd LT77.Even the TDI motor which makes its max torque at around 1750rpm fell down a huge hole and ended up off boost after each gearchange.And that was without a trailer,with a decent load on the trailer it was awful.
The closer ratios of the 5spd mean it can pick up from where the last gear got to.This will be even worse with the BMW engine,which in a P38 in manual box form is bloody hard work to get away - esp with a trailer.
If you don't do too,too many miles why not just use a carbed 3.5v8 ? You wont find an engine that is much smoother than that,and unlike the BMW its reliable.
 
NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

dont


fit a jap 6 pot fron nissan or toyota..you will not regret the higher initial expense
(i have a patrol 6 pot turbo diesel with lpg injection..40mpg at 65mph..more torque than 3.9 v8..)..you will need to change transferbox ratio for the diesel..more expense

or lpg v8..(if in uk)..
 
Sounds like I'll have to keep the electronics and have a re-map......I understand the gear ratio's issue with the LT95. I love the V8 but the mileage I plan to do mean it is not feasible really.....another reason for the M51 is mechanical injectors and I plan to make my own diesel veg for maximum economy. I heard somewhere that the transfer gearbox gearing can be changed with an ashcroft kit or something.....Barring that, what's the LT85 5 speed from the early 4 doors like?, or maybe the R380 from the p38 with a tdi transfer box?.....

Thanks all for the advice.
 
if you insist on using the bmw gutless complicted unit..espically with diy fuel..then any lr gearbox will do..it wont produce enough power to harm any..talking rrc or disco..

lt85 is good..i have one behind 400hp..and yes you can get different gears for lt95,but not from ashcroft, dave dont touch them..(lt95)

lt77.r380 etc all good..

go jap diesel..
 
zen said:
if you insist on using the bmw gutless complicted unit..espically with diy fuel..then any lr gearbox will do..it wont produce enough power to harm any..talking rrc or disco..

lt85 is good..i have one behind 400hp..and yes you can get different gears for lt95,but not from ashcroft, dave dont touch them..(lt95)

lt77.r380 etc all good..

go jap diesel..
Click to expand...

Just to look at my options zen, what jap diesel do you recommend that can run on veg, is not a noisy clanker and will return good mpg while sitting happily in front of a land rover manual gearbox?....

Thanks for your input.
 
May I suggest 1uzfe over a 1960's pushrod v8 pile of ****.

But I'm biased as I have one slotted in my 90
 
but a 1uz wont run on bio diesel...
older the better..non electronic.preferably with inline pump..so nissan patrol sd33 is good..turbo it..(as uk ones are n/a)
or something similar...
problem is diy fuel...get it wrong and say good bye to any modern units pump and injectors...hense old school units..
even prehaps perkins 6247..one on ebay,didnt sell for 400, everything including gearbox..(rrc conversion).maybe relisted...?

just to make my point here clear..i was thinking of doing exactly as you wish to do...but came to conclusion..that engine is farrrrrrrrrrrrrr to gutless,crap and there are much better ones out there..even the 200 tdi is better!
 
Last edited:
zen said:
but a 1uz wont run on bio diesel...
older the better..non electronic.preferably with inline pump..so nissan patrol sd33 is good..turbo it..(as uk ones are n/a)
or something similar...
problem is diy fuel...get it wrong and say good bye to any modern units pump and injectors...hense old school units..
even prehaps perkins 6247..one on ebay,didnt sell for 400, everything including gearbox..(rrc conversion).maybe relisted...?

just to make my point here clear..i was thinking of doing exactly as you wish to do...but came to conclusion..that engine is farrrrrrrrrrrrrr to gutless,crap and there are much better ones out there..even the 200 tdi is better!
Click to expand...

Have to agree with your opinion on tdi's, far superior to the sd33 or the perkins but they are underpowered and agricultural now.....I know the BMW unit is reputed to be underpowered in the p38 but that's the way they were set up in the factory. Most people didn't realise that they had to actually use the full travel of the accelerator pedal to get it to perform. I was also considering the Mazda sl35t or the Nissan fd35t as an option but too thirsty and agricultural. Refinement and smooth power delivery is what I want. I have no plans to tow anything or drag race it. Just some casual weekend driving will do me.......
 
landyboots said:
Have to agree with your opinion on tdi's, far superior to the sd33 or the perkins but they are underpowered and agricultural now.....I know the BMW unit is reputed to be underpowered in the p38 but that's the way they were set up in the factory. Most people didn't realise that they had to actually use the full travel of the accelerator pedal to get it to perform. I was also considering the Mazda sl35t or the Nissan fd35t as an option but too thirsty and agricultural. Refinement and smooth power delivery is what I want. I have no plans to tow anything or drag race it. Just some casual weekend driving will do me.......
Click to expand...
Plenty of Ooomph in the M51 if you boot it, especially if chipped.:)
 
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