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OM617-vs-2 stroke diesel
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CRD4x4 Offline
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Post: #1
OM617-vs-2 stroke diesel
I have a '71 Jeep DJ5 (postal) that I'd like to repower with a diesel engine.
Engine choices:
'81 OM617 (195k)
Circa '57 all aluminum, valveless 4.1L V4 two-stroke (1 of 2 known to exist)
I can go "safe" with the I5 or go "all out" with the V4

Turbo choices: (2) GT2256 VGT or HE351VE with stock intercooler
Can a valveless 2-stroke be turbocharged?! Does boost go to blower or bypass? Parallel 2256's or single 351?

Thanks for your input!!

'05 Jeep Liberty CRD - 130k
'06.5 VW Jetta TDI - 160k
'82 MB 300TD - 116k
'81 MB 300TD - 195k (parting out)
'71 Jeep DJ5 - diesel conversion project
08-19-2012 08:28 AM
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Mark_M Offline
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Post: #2
RE: OM617-vs-2 stroke diesel
I would check the rev range of the 2 stroke as they are typically found in plant, marine, rail/diesel electric where the range is very narrow. This isn't much use on a road going vehicle for obvious reasons. Turbo charging is a requirement on a 2 stroke diesel in fact all the ones I can think of are compound with a supercharger as well. Forced induction is needed to scavenge the exhaust gasses. If your sure it doesn't have exhaust valves I would definitely give it a miss as it wont have any rev range and will be an utter pig to get started.
It will be a great engine but not for a car.
08-19-2012 06:32 PM
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dude99 Offline
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Post: #3
RE: OM617-vs-2 stroke diesel
As said above I too believe that all two stroke diesels require a blower to run at all and a turbo to make power. Is it a detroit engine? It would be interesting to know.
08-19-2012 07:04 PM
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ronnie Offline
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RE: OM617-vs-2 stroke diesel
Detroit's use exhaust valves. Turbo charging is not required, but a blower is, at least on a detroit. A turbo is often used in addition to the blower. And they do make great truck engines.

Must say that if only two exist of whatever you have I would not use it. Keep it as an antique engine and then use the 617.
08-19-2012 08:00 PM
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dude99 Offline
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Post: #5
RE: OM617-vs-2 stroke diesel
Maybe post some pictures of the 2 stroke as well as the info on it. I'd be curious to see it.
08-19-2012 10:46 PM
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Simpler=Better Offline
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Post: #6
RE: OM617-vs-2 stroke diesel
Two strokes are for chainsaws Tongue

I've seen the V4 in person, it looks like it could be a beast with work. Kinda wide though....

Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan Wrote:I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
(This post was last modified: 08-20-2012 09:38 AM by Simpler=Better.)
08-20-2012 09:20 AM
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Mark_M Offline
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Post: #7
RE: OM617-vs-2 stroke diesel
(08-20-2012 09:20 AM)Simpler=Better Wrote:  Two strokes are for chainsaws Tongue

I've seen the V4 in person, it looks like it could be a beast with work. Kinda wide though....

That would be some chainsaw Big Grin

[Image: 10000hp6.jpg]
08-20-2012 06:52 PM
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CRD4x4 Offline
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RE: OM617-vs-2 stroke diesel
    Wow! I wish my 300td FS post was getting this much attention! When you're done reading this, buy some parts from me.
the 2-stroke is a Harnischfeger V463 (4cy-63cid ea.) and of course it has a blower. I was wondering if pushing boost from a turbo, straight into the blower would work (not f up the blower). I don't know enough about compound systems.
I was lucky enough to get the operation manual, parts manual, etc with the engine otherwise I'd have scrap aluminum. In the manuals it shows 2 configurations: automotive and marine. Mine is marine but the only difference is the accessories. Both turn ccw.
This pic is of the "other one". I'll take a pic of line tomorrow.

'05 Jeep Liberty CRD - 130k
'06.5 VW Jetta TDI - 160k
'82 MB 300TD - 116k
'81 MB 300TD - 195k (parting out)
'71 Jeep DJ5 - diesel conversion project
08-20-2012 09:11 PM
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aaa Offline
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Post: #9
RE: OM617-vs-2 stroke diesel
Eh I don't think you'd have trouble turboing it. I do wonder about backpressure though, higher than boost levels probably aren't sustainable.
08-20-2012 09:27 PM
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dude99 Offline
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Post: #10
RE: OM617-vs-2 stroke diesel
Whats the output side look like? Would it be hard to mount a transmission to?
08-20-2012 09:45 PM
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CRD4x4 Offline
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Post: #11
RE: OM617-vs-2 stroke diesel
    its apparently an sae3 bolt pattern, but how do I find out what bellhousings are sae3?.
(08-20-2012 09:45 PM)dude99 Wrote:  Whats the output side look like? Would it be hard to mount a transmission to?

'05 Jeep Liberty CRD - 130k
'06.5 VW Jetta TDI - 160k
'82 MB 300TD - 116k
'81 MB 300TD - 195k (parting out)
'71 Jeep DJ5 - diesel conversion project
08-21-2012 05:58 AM
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CRD4x4 Offline
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Post: #12
RE: OM617-vs-2 stroke diesel
Turbo or not turbo? That is the question.
After fingering through the manuals (again) the only references to rpms was found in the table of limits, which gives 600 and 2800 as the parameters. So if idle is 600 then 2800 must be optimal operating rpm. Not red line, right?
Is there a tranny that anyone can think of that'd work with that?
The only hp rating was on a print ad that I got from ebay. It said 160 hp.
Any idea what kind of torque that would equate to?

PS does anyone know how to make pic sizes smaller on a 1st gen droid? I have pics, they're just too big.

'05 Jeep Liberty CRD - 130k
'06.5 VW Jetta TDI - 160k
'82 MB 300TD - 116k
'81 MB 300TD - 195k (parting out)
'71 Jeep DJ5 - diesel conversion project
08-21-2012 01:09 PM
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dude99 Offline
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Post: #13
RE: OM617-vs-2 stroke diesel
Well most industrial diesels, such as those in tractor trailers and the like, redline around 3000RPM so 2800 could quite possibly be the red line. I haven't ever seen a bolt patter quite like that before, but I don't have a lot of experience with industrial diesels. Anything can be made to fit with an adapter plate. The only problem I can see with it is that starter. It looks like it could be in the way.
08-21-2012 09:29 PM
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Tmadia Offline
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Post: #14
RE: OM617-vs-2 stroke diesel
Looks like an SAE bolt pattern to me.

http://www.garbee.net/~cabell/sae.htm

'85 300CD
08-21-2012 10:23 PM
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Simpler=Better Offline
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Post: #15
RE: OM617-vs-2 stroke diesel
Well shit that makes it easy

Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan Wrote:I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
08-22-2012 08:46 AM
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