Max sustained RPM?

[SMiller]

The 6.0 makes peak power at 5400RPM so 4500 is certainly within the parameters for the engine but the engines aren't intended to run constantly at peak power, or at least not if you want longevity.

This is false, the L96 is used in commercial applications and is made to run at high RPM's.

 

For someone that is not used to commercial applications you can think of a boat where you go WOT across a lake or large body of water, it is common to run 5,000rpm and these applications are not getting the cooling that a truck is at high speed with lots of frontal area cycling lots of fresh air.

 

 

 

You cannot kill or hurt a GM LS based motor!

[2016HD]

Run at 4500rpm all day long. Its a gas engine. And that is where its happy right around 45000 maybe up to 5000rpm. 4500rpm is just above peak torque. Itll run there all day long and not have an issue. Even old 350ci chevy engine was happy around 4000+ rpm. Thats what they are made to do. Dont worry just watch your trans temps if your in a long pull!!

[2016HD]

If you watch the 2015 and 2016 IKE gauntlet truck test. They run the 2500Hd gas pretty much fully loaded and just let the computer control gear it wants. Pulling up a long hill they basically just left there foot to the floor and it revved around 5000rpm for around 8-10 mins. LOL. I would have adjusted the throttle and or gears to get into a bit lower rpm. But this is what they are designed to do .

[redwngr]

From GMPowertrain webpage:

6.0L L96

TYPE: 6.0L Gen-IV V-8 Small-Block

DISPLACEMENT: 5967 cc

ENGINE ORIENTATION: Longitudinal

COMPRESSION RATIO: 9.7:1

VALVE CONFIGURATION: Overhead valves

VALVES PER CYLINDER: 2

ASSEMBLY SITES: Romulus, MI; St. Catharines, Ontario;

and Silao, Mexico

VALVE LIFTERS: Hydraulic roller

FIRING ORDER: 1 - 8 - 7 - 2 - 6 - 5 - 4 - 3

BORE X STROKE: 101.6 x 92 mm

FUEL SYSTEM: Sequential Fuel Injection

FUEL TYPE: Regular Unleaded, E85 FlexFuel

HORSEPOWER: 360 hp (268 kW) @ 5400 rpm*

TORQUE: 380 lb-ft (515 Nm) @ 4200 rpm*

MAXIMUM ENGINE SPEED: 6000 rpm*

EMISSIONS CONTROLS: Catalytic converter, three-way

catalyst, positive crankcase ventilation

BLOCK: Cast iron

CYLINDER HEAD: Cast aluminum

INTAKE MANIFOLD: Composite

EXHAUST MANIFOLD: Cast nodular iron

MAIN BEARING CAPS: Powder metal

CRANKSHAFT: Cast nodular iron with undercut and

rolled fillets

CAMSHAFT: Hollow steel

CONNECTING RODS: Powder metal

*As tested in Chevrolet Silverado HD <10,000 lbs gasoline.

http://gmpowertrain.com/engines/docs/GMQD16CLA60_L96_Product%20PDF.pdf

[sdeeter19555]

Run at 4500rpm all day long. Its a gas engine. And that is where its happy right around 45000 maybe up to 5000rpm. 4500rpm is just above peak torque. Itll run there all day long and not have an issue. Even old 350ci chevy engine was happy around 4000+ rpm. Thats what they are made to do. Dont worry just watch your trans temps if your in a long pull!!

Believe it or not, trans temps don't really climb that fast on a hard pull...although I do have an aftermarket cooler, mine might have came up 5 degrees on that ling pull? Ambient was mid 80s last weekend, I didn't go over 165 degrees on the trans.

 

The converter is locked when pulling hard, you are moving a lot of air and fluid; you're not generating that much heat.

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

[Big Whiskey]

Good advice here. Let that sucker rev! As long as there's plenty of oil in it, you have to do something really crazy to hurt a 6.0. Keep an eye on your coolant & transmission temps, and you should be good. You can also experiment with tow/haul mode and manual shifting mode to see if you find a method you like better.

[redwngr]

Believe it or not, trans temps don't really climb that fast on a hard pull...although I do have an aftermarket cooler, mine might have came up 5 degrees on that ling pull? Ambient was mid 80s last weekend, I didn't go over 165 degrees on the trans.

 

The converter is locked when pulling hard, you are moving a lot of air and fluid; you're not generating that much heat.

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

+1

 

Trans temps are a typically bigger issue during slow stop and go type driving - when torque is more likely to be slipping slipping and airflow thru cooling system is lower.

[SMiller]

+1

 

Trans temps are a typically bigger issue during slow stop and go type driving - when torque is more likely to be slipping slipping and airflow thru cooling system is lower.

As well as lots of shifting and having the torque converter unlocked, amazing what a lot of airflow and a locked converter will do.