Diesel Modification

[rfdesigner]

comming to this thread late:

I drive a Mercedes E320CDi... that's the stright 6 direct injection diesel.. prior to that I had a W124 coupe... (the best car I ever owned.. or probably ever will own.. unless I get a R129)

E320CDi
~200hp
0-60 in 8 seconds
144mph top speed
I can get 36mpg US on a run... it would be higher but for the gearbox (sloppy torque converter)

The W210 onwards are a ***** to eco-mod. The entire system in run on a CAN-bus, and everything talks with everything else. So if you want to change the way the box works, you'll spend a LOOOOOOONNNNG time hacking code.

I've given up... and I'm a pricipal engineer specialising in electronics (RF/mix signal/embedded/production etc. etc.)

If you could take just the engine and lock the torque converter up properly then it might be more efficient as you could keep the revs down more.

I'd also be wanting to look at all the ancillary bits and bobs. With a fuel pump capable of delivering 200hp of fuel it's pumping away all the time as it's on a direct drive, so that's a load of energy used in just pumping fuel back and forth.




Alternatively a W211 E270CDi manual could be a good solution.
5 cylinders.. 177BHP, 45mpg (US) extra urban.

Mercs can be expensive to run... or not, if you know a little about cars and can find a good independant merc specialist.

Merc quality used to be bullet proof (W124/R129) then it went all rusty on the W210, things improved a bit on the facelift W210 and W211, better on the facelift W211. There was an almighty b@!!s up on the W212 injectors but that's been dealt with very well.. we'll have so see how things pan out from here, things do seem to have gone better now Merc have parted from Crysler.

[ConnClark]

Originally Posted by rfdesigner

Merc quality used to be bullet proof (W124/R129) then it went all rusty on the W210

I see you have never owned a pre 1986 w126 The OM617 engine was as bullet proof as they ever got.

[rfdesigner]

Originally Posted by ConnClark

I see you have never owned a pre 1986 w126 The OM617 engine was as bullet proof as they ever got.

no.. never owned one but always admired the 126s, just perhaps a little big for the UK. Never the less the W126 was also a truely great car.

Reading around the web the OM613 (my engine) does seem to be well liked.

Mine's 177k miles and so far it's only needed oil changes and two new thermostats, that's it.

I'm planning on taking it over 300k miles... hypermiling of a different sort.

//EDIT
Googling on I found this:

"The compression-ignition engine also found its way into the 126 series in the 300 SD Turbodiesel (1980 to 1985) and 350 SD Turbodiesel (1990 to 1991). What these specimens of the Stuttgart luxury class had in common is that they were sold only in North America."

Which could be a very good reason for my ignorance of these engines in a 126... living as I do in the UK.

[trooper Tdiesel]

the 3.1L 4JG2-T Isuzu I-4 diesel IDI injected for on road engines, DI for the off road engines

there HP is a little less then a stock GM 6.2L
at about 130hp and a little lighter at 550LBs
the 2WD trans is around 80 to 100LBs



there's also the 4JB1-T its a 2.8L I-4 and DI injected all models
thats the one i want, give up 20hp for about 2 more mpg than the 3.1L

[Varn]

From an "eco"-nomics perspective changing engines may or may not make sense. How many miles are you going to be able to drive your Jag before it is rusted out? We have been paying at least 10% more for diesel fuel than for gas.

Cold weather starting is always more problematic with a diesel. I have 3 diesel engines one car and two tractors. None of them want to start unless plugged in in the winter.

[320touring]

If you asked nicely, i'm sure a BMW e36 m51 2.5 tds lump or a later 3.0 ycyl lump from an e46 could be found over here

The 2.5 gives 145bhp and about 45uk mpg at 80mph

The 3.0 does either 197,217 or 231bhp dependant on application..and similar mpg

[jojogunn]

The 6.2 GM diesel was phased out as a hummer powerplant, so the govt dumped their inventory of that engine a couple years ago. There were crate engines available for a while. The site "Diesel stop" had vendors advertising them.
There is a company called JTR ( Jags That Run ) which sells chev. V8 swap guides for the jags. Since the 6.2 will fit where the gas V8s can go, this might be an option to help in engineering the swap. I would include the addresses for the sites, but this forum blocks posting links until I get enough posts.

[tinduck]

Originally Posted by skyking

a 1.9 is no match for the chassis weight of the Jag. It weighs in at 3979 pounds.
That would be a frightening drive in any trying condition, a merge, etc.

Obviously, you have never driven this kind of engine in a heavy car.

Mine has the 2,0 litre CR TDI with 140 hp / 221 lb ft and weighs 4850 pounds, max gross weight 6800 pounds, and is allowed to tow trailers up to 5500 pounds when fully loaded, too.

When at curb weight, this rig flies... on acceleration lanes (autobahn) you can chase a good percentage of 'normal' cars while moderately accelerating (never above 2500 rpm). Even at full load with a trailer, it is still OK, though you have to rev it up a bit. Top speed is north of 105 mph with the 6-speed manual gearbox (only tried this once, FE is REALLY su**ing then).

TDIs do not have a power issue!

You can even get this engine with a register biturbo setup and 185 hp / 295 lb ft... only thing is, I do not know if those are readily available over in the US.

A 2.0 monoturbo like mine should be available from a scrapped VW Golf VI, Audi A4 or VW Passat. But beware, they come in at least 3 hp flavors.. if you get an 68 KW one, you can easily chip it to get 103 KW / 140 hp since the engine is exactly the same, only the ECU has different software.

so long,

tinduck

[ecomodded]

Originally Posted by Plum

2002 Jetta TDI with the 1.9 in it comes in at 2970 lbs

1000 lbs differential if I were to go this route - unsure the weight difference in the engines, but one would think the engine is lighter.

I can tell you from experience the 1.9 turbo tdi can easily pull 4,000 lbs.

I tow a 250 lbs trailer with a 750 lbs jet-ski with a passenger and assorted summer beach supplies, a cooler , BBQ and other items.
I can honestly tell you the 1.9 tdi tows this weight with NO noticeable struggle,it easily pulls my jet-ski,Truthfully it pulls the jet-ski easier than my low mileage 6 cyl. 3L ford ranger did, much easier.

[skyking]

The TDIs I have driven were happy in the 3000 pound range. I defer to your experience.