thats true for sure. but they idle like crap and sound terrible for the first minute or so.. i always thought that it was hard on a diesel to do that..
yeah LB7's might, because their glow plug system is much more dumb/basic than the newer trucks. (basically just 12v glow plugs that are tied to a heavy duty relay thats turned on for "X" seconds based on "Y" coolant temp)
But the LLY+ trucks have an electronic/solid-state "smart" glow plug system and are much better (glow plugs are 4.7v, individually temperature controlled with feedback, etc).
-25*, not plugged in, my glow plug light goes out and the truck is ready to start within ~4 seconds. LBZ's-LMM's are even better/faster, and LML's are faster/better yet.
[YOUTUBE]d1kLB9EbIdA[/YOUTUBE]
[YOUTUBE]79UrF6COjsg[/YOUTUBE]
[YOUTUBE]1-JhQSF3mHo[/YOUTUBE]
[YOUTUBE]LIVatr34Yfo[/YOUTUBE]
http://www.youtube.com/watch?v=d1kLB9EbIdA
http://www.youtube.com/watch?v=79UrF6COjsg
http://www.youtube.com/watch?v=1-JhQSF3mHo
http://www.youtube.com/watch?v=LIVatr34Yfo
AND...here is my own cold start video from my truck. This is with bigger injectors, without being plugged in, -7*(F), lower-than-stock compression, and on
ONLY ONE BATTERY.
[YOUTUBE]6iA72Mzv9ek[/YOUTUBE]
So for all the people with twins who think their truck wont start with only one battery, heres proof that it will. Disclaimer: cold-starting on only one battery is hard on the battery. The single battery in my truck was "dead" (stopped holding a charge/worn out) after a little less than 3 years (3 winters) of cold starts. So yes, they will start on one battery, but your battery life will be diminished.
Ben