โJun-21-2004 09:12 PM
We are getting closer to answers I am looking for etc.
โNov-28-2011 08:35 AM
โNov-28-2011 08:06 AM
gsxr1300 wrote:
I drive a 2011 F250 crew cab 4x4 6.7 diesel I know its overkill for my trailer but the ear to ear grin everytime i drive it is worth it!Also 2000 miles on it so far and its averaged 20mpg
โNov-27-2011 06:02 AM
โNov-15-2011 03:18 PM
durallymax wrote:RUFFSTUFF wrote:durallymax wrote:
I said not as much as YOU think. And also said the newer systems, the refined systems, you drive an 08 thats not the newer systems. The newer systems are fine tuned much better, GM has added a 9th injector now to reduce fuel usage for the active regens of which fewer are required due to the engine being able to run hotter and more efficient thanks to the SCR system cleaning up the high NOX levels created from an engine running in that state.
The LMLs are getting fuel economy similar to LBZs, is that great? Not the best, but way better than the LMMs, and your getting 115ft-lb more torque and 47 more hp (than the LBZ)
Well since I drive a 2010, I'm pretty sure that qualifies as NEWER, though not necessarily NEW. I don't spend much time THINKING about how much fuel I use for regen, I KNOW. Now if you want to give proper credit for reduced NOx levels, then that would be due to the use of the SCR and DEF, which hit the streets in 2010 for MY2011. The DPF is for soot, not the same animal as the SCR and the DPF is responsible for fuel consumption due to regen. Now if you care to share the details of how the DPF systems have been improved since 2008, we would certainly love to hear it. IMO, any fuel used to clean the DPF is wasted. Especially when you consider about 1 regen per tank, highway use.
Time for some mods, and the DPF is history.
You should re read my post. You kind of missed my point. The scr and dpf systems do not interact together but have a cause and effect with engine tuning. 07 emissions trucks were tuned to reduce NOX a side effect of this tuning is more soot due to a more incomplete burn. This causes the DPF to plug up faster. Now with SCR the engines can be tuned for efficiency and power, because the SCR will clean up the excess NOX. More efficient combustion leads to less soot and fewer regens .
Again, just a more explained version of my initial post.
โNov-15-2011 04:28 AM
RUFFSTUFF wrote:durallymax wrote:
I said not as much as YOU think. And also said the newer systems, the refined systems, you drive an 08 thats not the newer systems. The newer systems are fine tuned much better, GM has added a 9th injector now to reduce fuel usage for the active regens of which fewer are required due to the engine being able to run hotter and more efficient thanks to the SCR system cleaning up the high NOX levels created from an engine running in that state.
The LMLs are getting fuel economy similar to LBZs, is that great? Not the best, but way better than the LMMs, and your getting 115ft-lb more torque and 47 more hp (than the LBZ)
Well since I drive a 2010, I'm pretty sure that qualifies as NEWER, though not necessarily NEW. I don't spend much time THINKING about how much fuel I use for regen, I KNOW. Now if you want to give proper credit for reduced NOx levels, then that would be due to the use of the SCR and DEF, which hit the streets in 2010 for MY2011. The DPF is for soot, not the same animal as the SCR and the DPF is responsible for fuel consumption due to regen. Now if you care to share the details of how the DPF systems have been improved since 2008, we would certainly love to hear it. IMO, any fuel used to clean the DPF is wasted. Especially when you consider about 1 regen per tank, highway use.
Time for some mods, and the DPF is history.
โNov-14-2011 05:00 PM
โNov-14-2011 09:12 AM
โNov-13-2011 08:39 PM
โNov-13-2011 06:10 PM
durallymax wrote:
I said not as much as YOU think. And also said the newer systems, the refined systems, you drive an 08 thats not the newer systems. The newer systems are fine tuned much better, GM has added a 9th injector now to reduce fuel usage for the active regens of which fewer are required due to the engine being able to run hotter and more efficient thanks to the SCR system cleaning up the high NOX levels created from an engine running in that state.
The LMLs are getting fuel economy similar to LBZs, is that great? Not the best, but way better than the LMMs, and your getting 115ft-lb more torque and 47 more hp (than the LBZ)
โNov-13-2011 05:30 AM
โNov-12-2011 10:45 AM
rcpd34 wrote:Jarlaxle wrote:
Yes they do.
Agreed. They use a stupid amount of fuel.
โNov-12-2011 09:04 AM
Jarlaxle wrote:
Yes they do.
โNov-12-2011 04:42 AM
โNov-12-2011 04:39 AM
RUFFSTUFF wrote:
The engineers who came up with the idea of dumping raw diesel into the DPF to clean it should be shot... Right after the engineers who came up with the idea of a DPF... And those right after the politicians who changed the emissions standards...
โNov-10-2011 05:12 PM