Differences between LLY and LMM
01-22-2008, 10:36 PM
#22
are you 100% sure on that? the 06 lly and lbz are i...dentical. the tune is the only diff. when they made the d-max they had to detune it to the 310 hp version. and in 06 they gave them the go ahead to do 360 hp. the insides are the same in 04i-06 lly and 06 lbz. the 01-04 have the same short block as the 04i-06, but diff. head design.
01-23-2008, 09:04 AM
#23
are you 100% sure on that? the 06 lly and lbz are i...dentical. the tune is the only diff. when they made the d-max they had to detune it to the 310 hp version. and in 06 they gave them the go ahead to do 360 hp. the insides are the same in 04i-06 lly and 06 lbz. the 01-04 have the same short block as the 04i-06, but diff. head design.
01-23-2008, 01:25 PM
#24
were are you getting info that the lbz has stronger internals than a lly? I have been in a lot of lb7's and a few lly's both 05 and 06's and they have the same parts in the lower end. It is hard to think that gm is going to beef the short block for 50 hp. the 06 lly and lbz should be the same. besides the bottom end of a 6.6 is damn near bullet proof on any version.
01-23-2008, 01:53 PM
#25
are you 100% sure on that? the 06 lly and lbz are i...dentical. the tune is the only diff. when they made the d-max they had to detune it to the 310 hp version. and in 06 they gave them the go ahead to do 360 hp. the insides are the same in 04i-06 lly and 06 lbz. the 01-04 have the same short block as the 04i-06, but diff. head design.
were are you getting info that the lbz has stronger internals than a lly? I have been in a lot of lb7's and a few lly's both 05 and 06's and they have the same parts in the lower end. It is hard to think that gm is going to beef the short block for 50 hp. the 06 lly and lbz should be the same. besides the bottom end of a 6.6 is damn near bullet proof on any version.
http://www.thedieselpage.com/duramax...ewsrelease.htm
The comprehensive list of changes and upgrades to the 2006 Duramax 6600 includes:
* Cylinder block casting and machining changes strengthen the bottom of the cylinder bores to support increased horsepower and torque.
* Upgraded main bearing material increases durability.
* Revised piston design helps lower compression ratio to 16.8:1 from 17.5:1.
* Piston pin bore diameter increased for increased strength.
* Connecting rod " I " section is thicker for increased strength.
* Cylinder heads revised to accommodate lower compression and reduced cylinder firing pressure.
* Maximum injection pressure increased from 23,000 psi to more than 26,000 psi.
* Fuel delivered via higher-pressure pump, fuel rails, distribution lines and all-new, seven-hole fuel injectors.
* Fuel injectors spray directly onto glow plugs, providing faster, better-quality starts and more complete cold-start combustion for reduced emissions.
* Improved glow plugs heat up faster through an independent controller.
* Revised variable-geometry turbocharger is aerodynamically more efficient to help deliver smooth and immediate response and lower emissions.
* Air induction system re-tuned to enhance quietness.
* EGR has larger cooler to bring more exhaust into the system.
* First application of new, 32-bit E35 controller, which adjusts and compensates for the fuel flow to bolster efficiency and reduce emissions.
* The Duramax 6600 also has a new intake air heater to reduce smoke and emissions during cold or light-load driving. The system features a 1000-watt grid heater located in the air intake duct, which is triggered automatically by the engine controller. It heats up the incoming air to speed warm-up of the engine.
* Cylinder block casting and machining changes strengthen the bottom of the cylinder bores to support increased horsepower and torque.
* Upgraded main bearing material increases durability.
* Revised piston design helps lower compression ratio to 16.8:1 from 17.5:1.
* Piston pin bore diameter increased for increased strength.
* Connecting rod " I " section is thicker for increased strength.
* Cylinder heads revised to accommodate lower compression and reduced cylinder firing pressure.
* Maximum injection pressure increased from 23,000 psi to more than 26,000 psi.
* Fuel delivered via higher-pressure pump, fuel rails, distribution lines and all-new, seven-hole fuel injectors.
* Fuel injectors spray directly onto glow plugs, providing faster, better-quality starts and more complete cold-start combustion for reduced emissions.
* Improved glow plugs heat up faster through an independent controller.
* Revised variable-geometry turbocharger is aerodynamically more efficient to help deliver smooth and immediate response and lower emissions.
* Air induction system re-tuned to enhance quietness.
* EGR has larger cooler to bring more exhaust into the system.
* First application of new, 32-bit E35 controller, which adjusts and compensates for the fuel flow to bolster efficiency and reduce emissions.
* The Duramax 6600 also has a new intake air heater to reduce smoke and emissions during cold or light-load driving. The system features a 1000-watt grid heater located in the air intake duct, which is triggered automatically by the engine controller. It heats up the incoming air to speed warm-up of the engine.
Last edited by kbracing96; 01-23-2008 at 02:25 PM.
01-23-2008, 02:54 PM
#26
and that just said that the 06's are the same. not that the lbz has a beefier bottom end than the lly in 06. the difference is the year then. cool. thanks for that info. i have not compared a 06 piston to a 05 lly but you can bet your *** i will just to see if there is a noticeable diff. the lb7 and lly insides look the same from 01 to 05. so still, the tune is the diff on the 2006's.
01-23-2008, 04:10 PM
#27
were are you getting info that the lbz has stronger internals than a lly? I have been in a lot of lb7's and a few lly's both 05 and 06's and they have the same parts in the lower end. It is hard to think that gm is going to beef the short block for 50 hp. the 06 lly and lbz should be the same. besides the bottom end of a 6.6 is damn near bullet proof on any version.
http://www.dieselplace.com/forum/showthread.php?t=66077
http://www.dieselplace.com/forum/showthread.php?t=67521
The 06 LLY has the same block as the new LBZ, but without the enhancements.
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