Duramax Diesels Forum Truck of the Week
  #841  
Old 04-06-2019, 10:06 PM
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I toured the shop last summer. The ones shipping out by the dozens for Oshkosh contract were all L5P long blocks.
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  #842  
Old 04-14-2019, 06:00 PM
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Well they made 550 and hit the danger zone on the turbo... go figure lol
Wonder what size turbo will go on it next
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  #843  
Old 04-14-2019, 06:37 PM
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What was their definition of danger zone? Just high drive pressure? Or are they worried about sustained EGT?
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  #844  
Old 04-14-2019, 06:42 PM
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Overspeeding the turbo and cylinder pressure.
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  #845  
Old 04-14-2019, 09:45 PM
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Quote:
Originally Posted by THEFERMANATOR View Post
Pretty sure he said those engines are LML based as he had them cast well before the L5P came out(he likes to post pics on the clean diesel facebook page). He commented several times that they are strokers at 7.1 or 7.4 litres using his forged crank, I believe monotherm steel pistons, and they use a larger diameter rod bearing than the LML and older, but not as large as the L5P. He's posted about them on his page a few times, I believe he even posted some internal comparison pics after the L5P came out showing the differences between his, LML, and an L5P.
Negative all the military stuff is l5p for the new replacement for the humvee.

Banks even played a role in the development of the l5p with gm
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  #846  
Old 04-15-2019, 09:41 AM
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Quote:
Originally Posted by Burn Down View Post
Overspeeding the turbo and cylinder pressure.
I ended up watching the video, never showed EGT. Actually surprised how long they held it at 500+HP

Anybody know if the wrist pins are bigger? Wonder how durable these l5p pistons are
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  #847  
Old 04-15-2019, 04:09 PM
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There’s a video and podcast he has done that shows and tells all specs and differences
My hopefully guess is he will be at 900+ before the rods fail
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And a few other retired Duramax's
06 360k aka Hog truck
07 320k aka Shop truck
07 340k Flatbed spare welding rig
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  #848  
Old 04-16-2019, 04:48 AM
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Quote:
Originally Posted by Hambone View Post
Well they made 550 and hit the danger zone on the turbo... go figure lol
Wonder what size turbo will go on it next
That was not news... The turbo is the choking point, has anyone had success with aftermarket turbos yet?
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  #849  
Old 04-16-2019, 06:31 AM
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That video played like a long advertisement for his new datalogger.
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  #850  
Old 04-16-2019, 06:51 AM
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I have a Derringer on my 2019 L5P, I am happy with it overall stock and even better with the Derringer.

I am going to drive it for the full 3yr/36k untouched, after that if its still trouble free drive it until the 5yr/100k is up, then its going to be addressed.

No sense in ruining a full warranty when its got plenty of power stock
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  #851  
Old 04-16-2019, 07:27 AM
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Quote:
Originally Posted by NC-smokinlmm View Post
That was not news... The turbo is the choking point, has anyone had success with aftermarket turbos yet?
yup, seen one with a 475 single on it.


Injectors are only good for about 650hp before you are tapped out on fuel.
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  #852  
Old 04-17-2019, 04:16 AM
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Quote:
Originally Posted by Chevy1925 View Post
yup, seen one with a 475 single on it.


Injectors are only good for about 650hp before you are tapped out on fuel.
Not surprising it's out of fuel, is it the injectors or pump?
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  #853  
Old 04-17-2019, 05:07 AM
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Supposedly, somebody swapped a 12mm stroker cp3 in place of the HP4. It would be interesting to get some more info on that...


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  #854  
Old 04-17-2019, 07:15 AM
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Quote:
Originally Posted by NC-smokinlmm View Post
Not surprising it's out of fuel, is it the injectors or pump?
injectors. the HP4 is much better at fueling than the CP4
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Quote:
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Mike L is my role model. I want to be like him when I grow up.
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02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

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  #855  
Old 04-17-2019, 07:19 AM
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Quote:
Originally Posted by M.A.M. View Post
Supposedly, somebody swapped a 12mm stroker cp3 in place of the HP4. It would be interesting to get some more info on that...


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Its in process he just picked it up from me last Friday. S&S modified it work it so far took a coolant crossover modification to physically fit.
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