6-hole injectors on LMM's??
- Thread starter McRat
- Start date
Yeah I saw that too and thought "Ill bet 5 bucks they are the same darn injectors as the LBZ has"
That doc is close to what I was told by a GM rep at an auto show last year. Everything I have read points to it having 6 hole injectors. I have no idea what the previous years had though.
6 holes for the LMM's we compared a set of LBZ pistons and they had 7 marks on them from the injectors opposed to 6 from a LMM
LBZ injector # 97361355 list $504.10 net $378.07 $100.00 core each
Revised fuel system with new injectors
For 2006, the injector tips have been rotated approximately 35 degrees compared to those on the previous injectors. This re-orientation points one of the seven spray holes directly toward the glow plug, improving the Duramax 6600’s cold-start performance
Each state-of-the-art high-pressure injector has its own solenoid to manage fuel spray, with seven spray points in each injector tip for better fuel vaporization.
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LLM injector # 98002368 list $779.12 net $545.39 $100.00 core each
FUEL INJECTORS IMPROVE COMBUSTION CHARACTERISTICS
Sophisticated solenoid injectors are used to precisely control combustion and to take advantage of the cleaner Ultra Low Sulfur fuel federally mandated to be available for all on-road diesel vehicles beginning in the 2007 model year. The injectors have six specially shaped holes, developed by Powertrain engineers to better atomize fuel for complete combustion of the fuel. The injectors are programmed to inject fuel into the combustion chamber at multiple intervals during one compression stroke. By doing this, the combustion event can be tailored to lower emissions and reduce noise at its source.
Revised fuel system with new injectors
For 2006, the injector tips have been rotated approximately 35 degrees compared to those on the previous injectors. This re-orientation points one of the seven spray holes directly toward the glow plug, improving the Duramax 6600’s cold-start performance
Each state-of-the-art high-pressure injector has its own solenoid to manage fuel spray, with seven spray points in each injector tip for better fuel vaporization.
-----------------------------------------------------------------------------------------------------------------------------------------------------
LLM injector # 98002368 list $779.12 net $545.39 $100.00 core each
FUEL INJECTORS IMPROVE COMBUSTION CHARACTERISTICS
Sophisticated solenoid injectors are used to precisely control combustion and to take advantage of the cleaner Ultra Low Sulfur fuel federally mandated to be available for all on-road diesel vehicles beginning in the 2007 model year. The injectors have six specially shaped holes, developed by Powertrain engineers to better atomize fuel for complete combustion of the fuel. The injectors are programmed to inject fuel into the combustion chamber at multiple intervals during one compression stroke. By doing this, the combustion event can be tailored to lower emissions and reduce noise at its source.
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Why 6 holes? ok here my explanation: With 6 bigger holes we get less atomization, so what the fu$$ we need less atomization: Our new DPF needs bigger particle to stick on that stupid DPF ... also the EGR's gets higher which helps to regenrate that stupid DPF ...
just my 2 cents ...
just my 2 cents ...
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Dont the newer Dmax motors also have a higher rail/injection pressure?? I may be off but i thought the early motors were supposed to maintain 23k psi while the lmm was up to 26k psi..... This right??
If so wouldn't that extra pressure generate better atomization??
If so wouldn't that extra pressure generate better atomization??
The million dollar question is wht flows more lbz or lmm and wht does a lbz flow and wht does a lmm flow.
GM "adjusts" that table for corrections to the fueling map.
However,
In general, you can use it to see the differences in injector flow rates. For OEM tunes, an LB7 takes about 1407 msec to inject 100mm of fuel at 160mpa. A LLY takes about 1526. LBZ takes 1584. LMM takes 1610.
It makes me wonder what would happen if you installed LLY sticks (yes they will fit, but you will have to modify the electric plug) in an LMM.
However,
In general, you can use it to see the differences in injector flow rates. For OEM tunes, an LB7 takes about 1407 msec to inject 100mm of fuel at 160mpa. A LLY takes about 1526. LBZ takes 1584. LMM takes 1610.
It makes me wonder what would happen if you installed LLY sticks (yes they will fit, but you will have to modify the electric plug) in an LMM.
I find it interesting that GMs cleanest diesel yet has less holes not more. Theory behind more being better is getting eroded IMHO. GM would spend far less money in the long run making injectors with more holes than spending the money on the hardware needed to run 5 injection events. Yet they did bring out more events instead. Makes you wonder about more holes being better thing. Now we come to find the LMM has less holes. Hmmm.
How about LBZ sticks or nozzles?
I wonder the same but if in fact our injectors are made diffrentley or fire diffrentley how would we do this any ideas any one ?