Has anyone ever found out what the power band is on a durmax? What RPM for best torque and horse power. Cant find any from the " General ". Even there "SI" at the dealership wont tell you. Bob
Bob;
This is one of the best places I've found to get info on you LLY engine. I used to go here when I had my LB7 and got a lot of good information. http://www.dieselplace.com/forum/
John
Duramax max torque - 1650 RPM with 650 lbs torque. At that RPM my 06 Duramax 6 speed is cruising at 62 MPH. This will give you the best pulling power and fuel economy.
Forrest, mine is an 05, 605ft# and 335 HP, 5sp trans. Power band is probably about the same. Pulls real good at 1800 and 61 MPH in tow/haul and in OD. Thanks Bob
Bob;
Not sure of your production date, but this is what I've found so far.
[*]Horsepower (hp / kw): 360 / 268 @ 3200 rpm (2500 HD and 3500 Chevrolet Silverado and GMC Sierra) (LBZ) (Automatic transmission only) (Available beginning 4 th quarter 2005)
[*]310 / 231 @ 3000 rpm (2500 HD and 3500 Chevrolet Silverado and GMC Sierra) (LLY) (Automatic transmission only) (Available through 3 rd quarter 2005)
[*]300 / 224 @ 3000 rpm 2500 HD and 3500 Chevrolet Silverado and GMC Sierra (LLY) (manual transmission), Chevrolet Kodiak and GMC TopKick (LLY) and Hummer H1 Alpha (LLY)
[*]250 / 186 @ 3200 rpm (Chevrolet Express and GMC Savana) (LLY)
[*]Torque (lb-ft / Nm): 650 / 881 @ 1600 rpm (2500 HD and 3500 Chevrolet Silverado and GMC Sierra) (LBZ) (Automatic transmission only) (Available beginning 4 th quarter 2005)
[*]605 / 820 @ 1600 rpm 2500 HD and 3500 Chevrolet Silverado and GMC Sierra (LLY) (Available through 3 rd quarter 2005), Chevrolet Kodiak and GMC TopKick (LLY), (Automatic transmission only)
[*]520 / 705 @ 1600 rpm 2500 HD and 3500 Chevrolet Silverado and GMC Sierra (LLY) (manual transmission), Chevrolet Kodiak and GMC TopKick (manual transmission) (LLY) and Hummer H1 Alpha (LLY).
[*]460 / 624 @ 3200 rpm (Chevrolet Express and GMC Savana) (LLY)
[*]Governed engine speed: 3250 rpm Silverado and Sierra (Heavy Duty), Kodiak and TopKick (Medium Duty) and Hummer H1 Alpha (LLY). 3450 rpm Express and Savana (LLY), Silverado and Sierra HD and 3500 (LBZ).
Gentlemen, I concur, any faster and you are throwing money out the window, any slower and you might end up with a honda stuck in the posterior of the Horn.................
UncleRog, honda! heck it be any thing here in socal. They all drive like NUTTS!!! I like 61 or 62 MPH, good fuel milage and maybe no china tires exploding ( got to be nice). I like my Chebby, its a brute. Bob
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