Duramax Diesels Forum Truck of the Week
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Old 03-18-2015, 06:01 PM
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Default LML Marine swap

I have two 2013 LML's from trucks with less than 20,000 mi on them. I am in the process of marinizing them to install in a custom center console fishing boat. I chose the LML's not realizing the difficulties getting someone to modify the wiring harnesses for a stand alone marine set up. PPE is looking into it but has never done an LML. It blows me away how these motors have been around since 2011 and aftermarket parts are almost non existent. If no one can build a harness at this time, why couldn't I re-outfit them with a harness and computer from an earlier series? LLM,LBZ,etc.
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Old 03-18-2015, 06:08 PM
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The computer is extremely complex and the tuners have to invest a large amount of time inorder to modify the tuning. It isn't really worth their time bc there isn't much demand yet. You can switch the heads out and run a LBZ ecu and injectors and cp3. That's a lot of effort, time and money though...

Call Ben at BT Diesel works. If anybody can figure it out Ben can...
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Old 03-18-2015, 07:38 PM
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I believe PPEI has already done a few LML for boats.
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Old 03-18-2015, 08:08 PM
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Dan at PPE told me today they hadn't done any LML's but would talk to their engineers and get back in touch.
Ben thinks he can do it by leaving the BCM connected but I have a couple more questions and it's really slow getting return emails or calls. I've got the mechanical stuff about whipped, water cooled headers and up pipes, water to air intercoolers, but not so good with electrical.
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Old 03-19-2015, 03:30 AM
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Quote:
Originally Posted by Hawk 40 View Post
Dan at PPE told me today they hadn't done any LML's but would talk to their engineers and get back in touch.
Ben thinks he can do it by leaving the BCM connected but I have a couple more questions and it's really slow getting return emails or calls. I've got the mechanical stuff about whipped, water cooled headers and up pipes, water to air intercoolers, but not so good with electrical.
Maybe try Gale Banks, he sell's Duramax marine engines.

http://www.banksmarine.com/
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Old 03-19-2015, 04:41 AM
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I talked to them a few month ago before I started, they wouldn't even give a $$ amount for their marine dmax, and none of the marine parts are for sale.
I do have an ace in the hole but their not cheap or quick.
Innovation Marine is just down the road from me and they build diesels for the navy. These are 700hp 5.9 cummins but they have a 550hp duramax test motor. They build the harnesses from scratch and use a different Bosch controller, harness and computer cost is around 12,000$ per engine plus 3 days on the dyno to do the fuel mapping and you have to catch them between production runs for the military, by then they are backed up with stuff from all the race guys around here.
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Old 03-19-2015, 04:41 AM
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For the time and cost to try and make an LML work, I would say just pull the LML harness, heads, turbo and sensors and sell them off and replace with LBZ but not sure about the cam and crank position sensors and the CP4 if they can just be replaced with early model parts. I'm sure someone here does however.
There are lots of LLY/LBZ marinized engines out there as they are much easier to run electronically (with a ZF6 transmission tune) with much more tuning options available. LML internals are good and also much cheaper for stock parts in the event something were to fail on them as well so I would keep the shortblock. Plus they are low mileage.
You would also be looking at changing out fuel lines to work with the LBZ stuff but again, lots of used stuff available.

Just my thoughts....
Also Marine Diesel does Duramax engines and has a couple shops in the US. They might be worth talking to for help but PPE can likely supply you with everything you need already if you do go LLY or LBZ. http://www.marinedieselengineering.c...gines/vgt-400/

Last edited by LBZ; 03-19-2015 at 04:49 AM.
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Old 03-19-2015, 04:45 AM
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Yeah I think that's probably the best route.
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Old 03-19-2015, 05:57 AM
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I would talk to Kory at PPEI. He will beable to point you in the right way on what you can and can't do with the LML's as far as a standalone is concerned. Since he probably understands the LML tuning architecture better then anyone at this time.
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Old 03-19-2015, 07:56 AM
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It can't be that hard with the tuning we have now and the harness can't be that bad either. I would love to do a marine swap with one.
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Old 03-19-2015, 12:29 PM
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I'm currently working with a company doing this for commercial boats. The LML was chosen as they can be purchased new for a good price. Thus the commercial customers are receiving a new engine package for their new boats. The LML can be used.
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Old 03-19-2015, 12:55 PM
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Thanks I'll be in touch.
Are you really in Idaho?
I'm in FL but operate a farm in Priest River Idaho and am out there off and on between march and nov.
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Old 03-19-2015, 07:16 PM
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Ypu must not be far from me as I know of innovative diesel. Call Kory at PPEI as he has DONE the tuning for one. I remember him posting a screenshot of some of the custom changes he made to do it. I know there is a thread over at EFILIVE's site about problems making the LML run stand-alone, so it isn't just a drop in swap. As to the stand-alone BOSCH controller, not sure if it will work with the PIEZO injectors, or if it only works with regular common rail inejctors.
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Old 03-20-2015, 10:06 AM
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Think I got it covered, SoCal sent me to a guy in Idaho who has done them.
Maybe I can get back on track now, boats done, got trannies and drives.
Dry fitting all of it next month then the engines can go back on the stands to finish up and dyno.
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Old 03-20-2015, 11:43 AM
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I would love to put my spare LLY in my blue water boat. anyone know where there is the manifolds and that type of stuff to do it?
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2005 2500HD dmax, CCSB, 4" exhaust, Built motor with Carillo's .020 over 16:5.1 piston with .075 reliefs, Socal 6480 alt fire cam, ported LBZ head's, Exergy 10MM pump Stock lly cp3 on the belt, 400% LBZ injectors, S471/87 compounded with a GT5541R 106MM Fleece billet charger Werhli fab S400 install kit with bridge and piping, Merchant Auto Billet push tubes, Socal Valve springs, Socal valve covers, Socal flex plate, Mishimoto black intercooler, DSP5, Air dog 165,

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1984 CJ7 Powered by a 2000' LS1 5.7L



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