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#31
06-07-2016, 12:37 PM
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Can't you get the prop over driven enough to compensate foe the low rpms? Even something custom build sounds cheaper/ better then getting the motor to live at that load.
Why are EGTS an issue at those RPMs? I'm learning here too. I hate the water/boats, but this sounds cool Sent from my SAMSUNG-SM-G900A using Tapatalk
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06 GMC 2500 CCSB SLT LBZ 4X4   These views expressed on this post are not my own, but rather randomly generated computer gibberish, and in no way should be used to judge the author's IQ or mental health. 
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#32
06-07-2016, 02:23 PM
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Quote:
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2016 GMC Denali 2500 4x4 CC/SB LML- 6" Rough Country lift w 20" XDs 2015 GMC Denali 2500 4X4 CC/SB LML - (STOLEN)  2009 Chev 2500 LMM (TRADED) EFI, all deleted, rode just as hard as her !!!, stayed together  2008 GMC 2500 LMM (SOLD)  EFI,all deleted,rode hard,stayed together 
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#33
06-07-2016, 02:33 PM
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When I joined this forum and put that on here i lived in Bagley MN which is south east of you probably a half hour or so... Now I live about an hour north of the cities
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2004.5 LLY CCSB Suncoast G-MAX 5 with Precision converter, Energy trans mount, AAM Torsen carrier, DHD transfer case brace, Big Chevy Hitch Trac bars, MBRP down pipe to straight 5 inch diamond eye to 7 inch MBRP tip, 4 inch bills custom intake with S&B oiled filter, S&B intake horn, AD II 165, Ported fuel rail fittings, DRP fuel rail plug, DRP egr delete, LB7 passenger side up-pipe, DRP PCV re-route, Edge CS monitor with EGT probe, Moog Problem solver pitman and idler arm, Cognito PISK, Fab-tech tie rods Duramaxtuner Built Trans Tunes
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#34
06-07-2016, 03:16 PM
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Quote:
Hence the 2 spd trans options.
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#36
06-07-2016, 07:46 PM
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It still seems to me that "gearing" via props & transmissions and a build that can make the power you need without being at full load is the only shot. I'd be blown away if there's any duramax on the planet that can live at or near full power over 1000 prop hp for even 10min straight let alone hours at a time. If that's the requirement, I can't wait to see what the build consists of & how long it lasts!!
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Mitch SOLD02 Chevy 2500HD D/A EC SB LS SCIII & X-Case brace by MA, Team Salad tuning  & Trippin's DSP5, 4" Diamond Eye exhaust, Fumoto Valve, partially debadged, Rhino Bed Liner, SuperDiesel Intake Manifold and Ported Turbo Inlet1983 GMC K30 CC SHORT BED  Awaiting Dmax/Allison Chassis Swap 
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#37
06-07-2016, 08:29 PM
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The big blocks can do it so I don't doubt a duramax can as well. I work with 1200 to 1500 hp diesels everyday that run at 80% load for 2+ hours straight. Granted they are huge but so are the boats they push...
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2010 GMC 1500 RCSB Denali Clone < lifted 22's/33's, Kooks, Magnaflow, 5.3, 6l80, TVS1900 @ 14#'s, BTR Top End Boosted Bump Stick, Trunion upgrade, 90mm, 10% over, 2.8 griptec, 105 lb ID's, Mayhem built/tuned. 2016 LML CCSB Denali < Lifted 22's/35's, Fox 2.0 < I officially need help. 
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#38
06-07-2016, 10:21 PM
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Wonder if one could find a set of the turbo 400's, and adapt into it. Set them up with no converters to do away with lockup concerns. Everybody says the 4L80E's weak point is OD, the 400 is basically teh same without OD, and theres plenty of drag trucks running them with big HP. It might would allow for dropping into 3rd say for cruise, but use 2nd for acceleration. I know they make the 2 speeds as well, jsut throwing out an idea that may be more advantagous in the long run tuning scheme. The limited RPM range coupled with the added cylinder pressure will be the killer here. Most don't realize just how hard it is to push a boat for hours on end, and have an engine live. Imagine dragging 80K lbs up a 6% grade for HOURS non stop.
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1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that, DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit. 
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#39
06-07-2016, 10:44 PM
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PPE did a hub drive variant with a Dmax/Allison.
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Adam mispeeling wrods n a thraed nere u 07.5 3500hd RCLB LMM GT4088R, 4.56 gears 225/70/19.5 efi live 478k broke block  99 FL60 8.3 12v 13sp  Quote:
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#40
06-07-2016, 11:29 PM
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Quote:
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1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that, DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
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#41
06-08-2016, 08:54 AM
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I missed out on pair of trans I wanted to use with 1.5 first and 1.0 second. Next choice is these COAN XMT units based off a powerglide.
 I've been helping get a friends boat running with a 6sp Allison, it's been a pain. Getting one to shift correctly and hold gears in a boat has proven harder than I imagined. So trying to get 2 of them to shift at exact same time, and play nice together is more than I wish to tackle this month.
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#42
06-08-2016, 09:05 AM
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What's your timeline on this puppy
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John
2005 Chevy 2500 LLY CCSB "Nyx" Legal Disclaimer: My comments on this board are based on my personal experiences and life lessons. Don't try this at home. Your mileage may vary. Model shown includes options. Past performance does not reflect actual capability or intelligence. I'm off my meds. Don't listen to a thing I say, you've been warned
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#43
06-08-2016, 09:48 AM
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12 weeks to have it rigged and be on the water. At least in time to make the Cumberland poker run and maybe go to LOTO if the client wants. Then she gets shipped home to Australia, just in time for summer boating season over there..
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#44
06-08-2016, 09:48 AM
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Two questions,
how large of a fuel tank is on this boat? two engines running near 1000 hp for potentially hours, how much fuel is it going to drink in that time? 2nd, would a Gear Vendors unit be of any help for gearing?
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2008 Chevrolet 3500HD DRW LTZ 285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L. 2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
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#45
06-08-2016, 11:16 AM
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cumberland poker run... as in Lake Cumberland in KY???
Are there any billet blocks available so they might be repairable/salvageable if/when engine internals let go? Given the short time period to achieve this... I imagine you have a game plan in place for the engines by now... So whats the plan?!?!
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Mitch SOLD02 Chevy 2500HD D/A EC SB LS SCIII & X-Case brace by MA, Team Salad tuning & Trippin's DSP5, 4" Diamond Eye exhaust, Fumoto Valve, partially debadged, Rhino Bed Liner, SuperDiesel Intake Manifold and Ported Turbo Inlet1983 GMC K30 CC SHORT BED Awaiting Dmax/Allison Chassis Swap
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