I'm considering a diesel swap for my '93 ranger. I'm going in a pro-touring direction and want to continue. More emphasis on comfort, handling, braking then high power numbers is what pro-touring entails. I like the alternative fuels available to diesel owners, the mpg capabilities and the power potential. I'll throw longevity in there too. So, I'm considering the om603 but am confused as hell as to what's what.

From my reading there are three om603 variants, a 2.2l 4cyl, a 2.5l 5cyl and a 3.0l 6cyl? I also see a 3.5l 6cyl and swear somewhere I saw a 3.0l 5cyl although I can't find that again so I may just be wrong. These are aluminum headed and 2v per cylinder? I'd definitely be looking at a turbo variant.

The difference between the om603 and om606 is electronic engine control? I think I read the 606 4v head is a direct swap. Is this a common way to improve airflow? It seems like it would be.

I'm shooting for around 300hp with injector nozzles, ip pump, turbo, exhaust and ic. I think this will be about there. These engines are safe up to about 400hp and if you swap in the 606 rods they well do a little better, again this is what I read, please correct me if I'm wrong.

Lastly I'm looking for specific weight numbers on these engines as well as overall external dimensions. The measurements will determine how many cylinders I am forced to go with.

If these questions have been answered please just direct me to those threads but I didn't see any after a preliminary search. Also if you could post a link to the couple of companies that mod these ip pumps that would be great. I think there was one in Finland and one stateside?

I see a few pedantic inaccuracies there (the 3.0l 5cyl is the older om617, the 2.5l 5cyl is the om602, etc), but the number one thing is 300hp is gonna be pretty darn expensive to get (the ip pump). And if you want that much then you may as well start with a whole om606 (you can swap the mechanical pump onto it).

616 - 2.4L 4 cyl non-turbo (like forever, largely done in 1985)

617 - 3.0L 5 cyl non turbo and turbo versions (thru 1985)
http://en.wikipedia.org/wiki/Mercedes-Benz_OM617_engine

602 - 2.5L 5 cyl turbo
http://en.wikipedia.org/wiki/Mercedes-Benz_OM602_engine

603 - 3.0L 6 cyl turbo (1986/1987) later 3.5's were the "rod benders"
http://en.wikipedia.org/wiki/Mercedes-Benz_OM603

Not sure a 603 will fit in a Ranger but have read about several 617s in lots of non MB rigs. Check out 4btswaps dot com for some intel on Rangers (and others)

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"Opportunity is missed by most people because it is dressed in overalls and looks like work" - Thomas Edison-
1979 300SD
1975 450SL
2014 Ram Cummins Megacab (tow rig)

Thanks for the responses. I'm actually a member over on 4btswaps and have a very similar post over there.

I'm not set on doing all the mods at once but over time. Isn't the 617 iron headed? I like the fact that the newer ones have aluminum heads.

I'm not tied to using the 6cyl either, if engine depth limits me to the 4 or 5cyl then that's what I will have to use or consider other options. I plan to mount the motor as low and far back as possible to help with cog and front/rear weight bias.

Heavy HP is possible but expensive. Do some research on this cat: http://www.youtube.com/watch?v=czV3fwZ73gc

http://www.youtube.com/watch?v=S9S22SawSxc&feature=related http://www.youtube.com/watch?v=FlRuU2_VmRc&feature=related

Crazy Finns with a lot of time (and money) on their hands. http://mersuforum.net/forum/

__________________
"Opportunity is missed by most people because it is dressed in overalls and looks like work" - Thomas Edison-
1979 300SD
1975 450SL
2014 Ram Cummins Megacab (tow rig)

Do some research. The Finns have got some pretty amazing horsepower out of the 617s. Don't want to anger the mods here by referring too much to outside sites but there is a dearth of info out there on folks who have had success with the 617s.

__________________
"Opportunity is missed by most people because it is dressed in overalls and looks like work" - Thomas Edison-
1979 300SD
1975 450SL
2014 Ram Cummins Megacab (tow rig)

What benefits does the 617 have over others?

Tougher and cheaper. Slower and heavier.

Pretty much sums it up.

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Gone to the dark side

- Jeff

Check out the diesel performance sub forum at the top of the diesel forum page.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving