Thread: Theoretical exercise RRC engine swap

LT230 Transfer case as fitted to non Viscous Rangies is one of the best cases in the market with constant 4wd.

I would keep this and work around that as your base. Had one with a Small Block chev and TH400 in front of it in my 85 Rangie.

Originally Posted by loanrangie

i found the UK site LR4x4 a video of a guy that put an OM606 and 722.6 auto into an F250 dual cab cab turbo/ intercooled and the thing hauls arse and returns 29mpg.
What engine is the M117 ?

V8 petrol engine.

You can find the details of the engines they manufacture here more easily than on the MB wiki (where you need to look up the vehicle models)


https://en.wikipedia.org/wiki/List_o...s-Benz_engines
Mercedes-Benz M117 engine - Wikipedia, the free encyclopedia

while I think about it, here's the spec for the om606:
https://en.wikipedia.org/wiki/Merced...z_OM606_engine

Basically the m117 engine designation started life as a 4.5L iron block alloy-head SOHC v8, and in about 1978 development prototypes converted it to alloy block and heads, and displacement increased to 5.0L. they were released into mainstream models in 1980-1
From there, in 09/1985 increased displacement 5.6L version was released, becoming their top-level offering for all petrol engined sedans until 1991.
AMG (were an aftermarket tuner at the time, not part of DBAG as they are now) made several performance versions based on the block - a 5.0, 5.4, 5.6 SOHC versions & 6.0DOHC version, early versions of which were rather 'fragile'.

The spare engine I have here is a high compression (euro spec) 5.6L v8 m117.968ECE basic spec:
bore/stroke 96.5/94.8
displacement 5547cc
compression 10:1
nom. output 220kW(300hp)/5000 DIN80/1269/EEC @1/min
torque 455Nm/3750 DIN80/1269/EEC @1/min
consumption l/100km:
city 16.8
90km/h 10.5
120km/h 12.7

I've found the fuel consumption figures to be highly accurate. I got about 17L city in the 560SEL (which this engine came from), but more like 22 in the 560SL (different spec engine and driving style)
On the highway - speeds between 100-140(ish) it returns 13-13.5L/100 without fail in both cars.
driving up twisty roads (like macquarie pass for example) with a lead foot still only nets about 19L/100 in hard driving.

The OM 606 has a couple of excellent advantages over the v8.

1. power is only slightly less in standard trim, and can easily be tuned to exceed the v8's stock figures.
2. is MUCH better on fuel overall, even taking the price disparity into account between 'ultimate' 98RON & 'ultimate' diesel.
3. more low-end torque. theyre just mental torque monsters... particularly If the turbo is better tuned, the power output increases significantly, without affecting reliability or needing any internal modifications.

then there's the intelligent stuff..... like no distributor or spark plugs, making deepwater crossings a little less problematic, simplified engine management when replacing the IP with one from an OM603 (no electrics to get wet)

And while the OM606 would be my choice, I already have the m117, which really makes the swap a bit of a 'no-brainer' except I'm leaning towards wanting an overdrive final drive in the transmission, rather than a 1:1.

the LT will need to be divorced.... as the 722 auto rear housing has no flange for a transfer case. so the VG150 may still be a simpler option.... I'll have to work it out more carefully with measurements underneath - because divorcing the transfer case means propshaft angle changes.... and I'll probably want to use CV's on the t-case rather than DC's....

does the Rangie ZF Auto have ability to be updated to 6 Speed or similar to higher spec BMW Units of upgrades or would the 4 speed suffice

As fun as it sounds swapping in bigger V8 with the mods and engineering required would really put me off.
Was the 722 ever fitted to a G or ML 4wd ?

Sent from my GT-I9300 using AULRO mobile app

Originally Posted by loanrangie

As fun as it sounds swapping in bigger V8 with the mods and engineering required would really put me off.
Was the 722 ever fitted to a G or ML 4wd ?

Sent from my GT-I9300 using AULRO mobile app

In a word, yep. all modern MB autos are prefixed with 722.
more specifically for Gwagen, the 722.3, 722.6 units favoured in w460/463.

722.0/722.1 hydraulically controlled 3-speed/4-speed 4-bolt 1969?1982
subcode-W3B 050 three-speed automatic unique to the 1975-81 450SEL 6.9
722.2 hydraulically controlled (fluid coupling) 4-speed 4-bolt
722.3/722.4/4G-TRONIC hydraulically controlled (TQ converter)4-speed 6-bolt 1981
722.5 5-speed (TQ hydraulically controlled 4-speed with additional electrically controlled 5th overdrive gear)
722.6/5G-TRONIC electronically controlled 5-speed overdrive (aka NAG-1 or W5A330/W5A580)
722.9/7G-TRONIC electronically controlled 7-speed automatic transmission
9G-TRONIC electronically controlled 9-speed automatic transmission

ML is a dirty word which should not exist in MB vocabulary.

Blasphemy but if a ZF Auto can handle a V12 BMW wouldn't it be easier to adapt engine to the transmission and transfer that work in the vehicle?

I don't know how similar/different Merc diesels are, but this thread may have something of interest in it for you, amongst all the typical Pirate BS and American crap.

OM617 Diesel swap.. - Pirate4x4.Com : 4x4 and Off-Road Forum