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  #1  
Old 03-09-2005, 09:30 PM
skunked skunked is offline
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Seen a few threads about this. How about ya'll sharing what you know about swapping a diesel into a GW? Anybody used anything except the 6.2/6.5 motors? What if any diesels will pretty much swap into a GW without a lot of mods?
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  #2  
Old 03-10-2005, 04:34 AM
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from the little that I understand about it, all take modifications. apparently the 6.2/6.5 take the least. I wanted to bolt one to my 727 tranny but I don't think an adapter is made.
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Old 03-13-2005, 12:21 PM
Superboob Superboob is offline
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a 12 valve Cummins from a dodge shouldn't be too hard...it's mechanical injection so no computer to worry about
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Old 03-13-2005, 12:39 PM
joe joe is offline
 
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Quote:
Originally posted by skunked:
What if any diesels will pretty much swap into a GW without a lot of mods?
It's the "without a lot of mods" thing that shoots you in the foot.
Any dsl will take "a lot" of mods just mounting it, adapting to running gear, suspension mods to carry the weight...blah blah not to mention the cost of the dsl and if it needs to be rebuilt. Not for the faint of heart wrench. I truly love oil burners and have yet to figure a way to do this "economically". Yeah it can be done for sure but $$$$/time invested versus mpg/$$$$ saved over a gaso FSJ...not.
Cheapest scenario I've found is get a Burb/pickup with a 6.2/6,5 and do the swap but I haven't been able to find one at what price I want to pay to make it feasible in the long run. Can it be done...you bet. Easy...cheap nope unless you stumble on a deal.
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Old 03-19-2005, 05:40 AM
Don in Missouri Don in Missouri is offline
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I'm thinking about a Cummins 4bt. The current stage of research is to find out if I can get adequate power out of 3.9 liters, and what kind of fuel mielage to expect. Then whether to use a GM or Chyrsler overdrive auto.

I have an extra 6bt Dodge drivetrain, but sicne the main goal is fuel economy, I think the 4 cylinder will be a better, lighter fit.
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Old 03-19-2005, 01:21 PM
mcinfantry mcinfantry is offline
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4bt
30+ mpg @ 55 with 4.56 gears, nv4500 and 38" tires
25+mpg @ 70mph same setup

what kind of power do you want? mine tows 3500 to 4000 fine. an m715 flat towed behind me stopped me at 60mph.... ive since dropped to 35's, but havent driven it enough to test it.

i can pull a bronco and tj out of the mud and both tied together, in second gear and foot off the clutch

[ March 19, 2005, 07:21 PM: Message edited by: mcinfantry ]
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  #7  
Old 03-19-2005, 02:40 PM
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Carl Rasmussen Carl Rasmussen is offline
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any one used the newer chev Duramax?
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Old 03-19-2005, 06:19 PM
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Not sure if I'd even bother looking at the Duramax. It would be a pain, it's big and from everything I've seen (and I may just be partial) it's a large boat ancher, at least compared to the power-smoke and the cummins.

aa
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  #9  
Old 03-20-2005, 11:22 AM
cowboy_tech cowboy_tech is offline
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The Ford 6.9 has more power than the 6.2 or 6.5 and prob cheaper than a 7.3 or 5.9. But of coarse with more power means you need at least 3/4 ton axels. The 4bl if you have access to one is prob your best bet.
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  #10  
Old 03-20-2005, 12:46 PM
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ohioj20 ohioj20 is offline
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It would be cheaper to put a 6.2 or a nonturboed 6.5 in. Less electronic things to worry about. Modifications are many.

Radiator, motor mounts, fuel filler, fuel tank pick up, bigger fuel line, transmission adaptor. are the ones that we did that come off the top of my head.

For those interesed with in a desent drive to Columbus, Ohio, there is a little get together so folks can see my J20 with it's 6.2
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  #11  
Old 03-20-2005, 12:51 PM
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Oh, a Cummins 5.9 is way too long, a 3.9 cummins is ok in length, but height is an issue, you may need a body lift and suspention lift.

A 6.9 and 7.3 are heavy motors and need a massive radiator.

I know International used Nissian 6 cylinders in their Scouts.

There is a place in California that is working on an adaptor to a Mercedes 5 cylinder and a GM Tranny.

Here is the link for the Ohio Jeep Diesel gathering

Ohioans interested in a 6.2 Diesel into a FSJ
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  #12  
Old 03-20-2005, 12:51 PM
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ohioj20 ohioj20 is offline
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http://www.ifsja.org/cgi-bin/ubbcgi/...c;f=4;t=000611
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  #13  
Old 03-21-2005, 05:18 AM
Don in Missouri Don in Missouri is offline
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Quote:
Originally posted by mcinfantry:
4bt
30+ mpg @ 55 with 4.56 gears, nv4500 and 38" tires
25+mpg @ 70mph same setup

what kind of power do you want? mine tows 3500 to 4000 fine. an m715 flat towed behind me stopped me at 60mph.... ive since dropped to 35's, but havent driven it enough to test it.

i can pull a bronco and tj out of the mud and both tied together, in second gear and foot off the clutch
That's good news. I knew vaguely of your truck, and figured it was time I learned more. I don't need to tow much, but I want to drive fast on the Interstate. Gas mileage is a primary onjective. I want to keep the Dana 44 axles. I want to keep the weight down, and it is nice and nimble the way it is. I want to run 32" tires and 3.54 or higher gears.

So your 4bt is not aftercooled and running around 100-125 horses? Are you satisfied with acceleration on the road? I figured if they can get 600 hp out of a souped up 12v 6bta, I ought to be able to get a 4bta up to 160-200 hp. It's nice to know you are getting by wihtout those mods.

I've got a 160hp 6bta, but I don't all that weight. I'm going for efficeinecy, not brut strength.

I am willing to sacrifice a little performance from my 360 gasser in exchange for mileage, but I want to know what to expect ahead of time.
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  #14  
Old 03-21-2005, 06:23 AM
FSJeeper FSJeeper is offline
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Quote:
Originally posted by ohioj20:
Oh, a Cummins 5.9 is way too long,
The 5.9 is not way too long. There are a number of these FSJ conversions running around, and the finest example is in an M715 owned be a very good friend. I witnessed the entire swap. No clearance issues.
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  #15  
Old 03-21-2005, 06:57 AM
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Carl Rasmussen Carl Rasmussen is offline
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Quote:
Originally posted by FSJeeper:
</font><blockquote>quote:</font><hr />Originally posted by ohioj20:
Oh, a Cummins 5.9 is way too long,
The 5.9 is not way too long. There are a number of these FSJ conversions running around, and the finest example is in an M715 owned be a very good friend. I witnessed the entire swap. No clearance issues.</font>[/quote]Really that is good to hear because If you can get a complete wrecked dodge truck then you can use everthing including the axles [img]smile.gif[/img]
That may be the way I will go one my CC

[ March 21, 2005, 12:58 PM: Message edited by: Carl Rasmussen ]
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Old 03-21-2005, 07:21 AM
joe joe is offline
 
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Quote:
Originally posted by ohioj20:

There is a place in California that is working on an adaptor to a Mercedes 5 cylinder and a GM Tranny.
Great motor but not enough poop for a 5000lb FSJ.
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Old 03-21-2005, 12:09 PM
82wagonlimtd 82wagonlimtd is offline
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So is a powerstroke out of the question??? I understand weight is more but will it fit?

Andy
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  #18  
Old 03-21-2005, 03:33 PM
cowboy_tech cowboy_tech is offline
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I think the main fit issue it in the oil pan. My 86 250 with the 6.9 has a pretty deep pan (10 qts). The only thing electric on it is gp and fuel shutoff. Also anything is possible with a torch and welder.
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  #19  
Old 03-22-2005, 12:09 PM
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The oil pan issue is what concerns us on our 6.2 swaps into the two GW's My 1990 and my dad's 1987. My J20 has a bout 3" clearence with the 6.2, but springs from hell that don't give, so we didn't worry about it. We are putting 3" lifts in the GW's, but who knows. Trial and error.

I still find it hard to believe a cummins 5.9 would fit in a FSJ with no mods. a 3.9 is the same length as an AMC 360.
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