title says it all.

aside from exhaust mods, are there considerations to this i've not considered?

for simplicity

asking for a friend

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1991 300D

Oil filter housing/oil turbo line

Attaching an air filter to the intake manifold.

Sixto
98 E320s sedan and wagon
02 C320 wagon

all good points

will it be happy in front of the 722.4 & 2.88 dif w/less power?

how does one optimize performance fueling-wise?

fwiw consider no ac or ps as factor

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1991 300D

I ran a OM617.912 NA with a 2:65 LSD and it ran great

How heavy is the vehicle? Naturally aspirated 300D ATs have a 3.46 diff from the factory. 2.88 with no turbo could mean a lot of manual downshifting even with aggressive tension on the control pressure cable. You’ll be giving up a lot in acceleration for relaxed cruising in 4th. 722.4 should be fine.

Seems like a lot of work and no mpg improvement to avoid replacing a turbo.

Sixto
98 E320s sedan and wagon
02 C320 wagon

to be fit into a w115....been reading up on swap issues.

as i currently am deep into the sd, was trying to estimate the cost of working with what i have vs buying/fabbing all the bits to get the turbo to fit

It may be harder on fuel as the n/a types are. That may just the different rear end ratios though.


Actually I would not want to give up the turbo. As a general rule they are not that troublesome.

the general idea was have an acceptable round town runner/driver while waiting for turbo related parts to be gathered.

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1991 300D

What’s going on with the turbo? If this is a short term patch until you get new bearings and such, just wire open the wastegate.

Parts seem pretty available. To me it is a lot of time invested to make a turbo motor run without a turbo as a stop gap measure.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

turbo: i fubared the housing retaining spring whilst attempting to tweak boost, been unable to locate replacement outside of spending on a parts unit.

from what i've gleaned so far the easiest route is using
CA manifold & 3K turbo + some fab work

looks like the all-in approach is best

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1991 300D

They’re fitting a 617 into a 115. The common 617 turbo doesn’t fit a 115 as is so running without the turbo might be a necessary compromise.

Sixto
98 E320s sedan and wagon
02 C320 wagon

Well the two engines, one with a turbo and one made without are identical block castings, (I think) and so the non turbo intake and exhaust manifold I suspect will bolt right up and you would have to reduce the size of the exhaust pipe also. But I would suspect it would be a dog of an engine because you have a good bit less compression on the turbo engine. So that would lower power output dramatically. Perhaps the non turbo head could be used on the engine with the turbo removed to get the compression back up.. If you don't have the money to farm it out it becomes a heck of a lot of work. Possibly the injection pump would have to be tweeked and perhaps different nozzles used. As long as your energy and your money hold out, you can do about anything, and even then it might not be so great.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

The blocks are actually slightly different, but that doesn't matter here.
Yes the NA manifolds will bolt up fine.

Actually, the .95x engines have 21.5:1 CR vs 21:1 for the rest...so none of that really applies...(of course compression figures will play into it though)


If one wanted to keep it NA permanently have a read of this:
NA OM617 123hp 270nm

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1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...many, many years in the making....
1977 280> 300D - 500,000km+ (to be sold...)
1984 240TD>300TD 121,000 miles, *gone*
1977 250 parts car
1988 Toyota Corona 2.0D *gone*
1975 FJ45>HJ45
1981 200>240D (to be sold...)
1999 Hyundai Lantra 1.6 *gone*
1980s Lansing Bagnall FOER 5.2 Forklift (the Mk2 engine hoist)
2001 Holden Rodeo 4JB1T 2WD