DriveHard, here it is GM 6.6 HD gasser 2020

[ls1mike]

Originally Posted by SeaJay
I was just thinking to myself, these big pickup trucks just ain't quite fast enough in a drag race for me. Hopefully these new larger engines will get me down the line in an acceptable time.



Well in a 2500/3500/4500 etc they are thinking towing, payload and duty cycle.

 

[Snagglefoot]

Originally Posted by ls1mike
Originally Posted by Snagglefoot
I have the 6.0 in a 2008 3/4 ton Suburban. Towing a 28 ft, 6300 lb trailer was a bit much and I had to drive at 3500 rpm when at 60 mph. It had 383 ft lbs of torque and that extra jump would be very helpful. Sort of like having an 11 on your amplifier!

You sure it is only 6300lbs? Is that dry?

I tow a 32 footer that is 7300ish to 7500ish loaded. My complete setup is 14100. I tow 60-65 in OD on the highway 2100ish to 2500ish RPM 6.0/4L80E. Maybe you have 3.73s. I have 4.10s


Yes, 6300 is the dry empty weight, so yes, its more loaded. I have a 6L90 and 3.73's. It has a manual gear control so I hold it in 4th which is just under 1:1. I don't use the two overdrive gears when towing because the transmission will hunt to the lower gears every time I hit a grade or headwind. On dead level with no wind I can put it into the top overdrive and it will rev at somewhere around 2800 RPM if I recall. I have LT 265 70 R16's. Peak torque is at somewhere above 4000 rpm (can't recall right now). The engine is made to rev so I don't worry too much about being above 3000 RPM, but yes, it would be great to have a bit more torque.

 

[ls1mike]

Originally Posted by Snagglefoot
Originally Posted by ls1mike
Originally Posted by Snagglefoot
I have the 6.0 in a 2008 3/4 ton Suburban. Towing a 28 ft, 6300 lb trailer was a bit much and I had to drive at 3500 rpm when at 60 mph. It had 383 ft lbs of torque and that extra jump would be very helpful. Sort of like having an 11 on your amplifier!

You sure it is only 6300lbs? Is that dry?

I tow a 32 footer that is 7300ish to 7500ish loaded. My complete setup is 14100. I tow 60-65 in OD on the highway 2100ish to 2500ish RPM 6.0/4L80E. Maybe you have 3.73s. I have 4.10s


Yes, 6300 is the dry empty weight, so yes, its more loaded. I have a 6L90 and 3.73's. It has a manual gear control so I hold it in 4th which is just under 1:1. I don't use the two overdrive gears when towing because the transmission will hunt to the lower gears every time I hit a grade or headwind. On dead level with no wind I can put it into the top overdrive and it will rev at somewhere around 2800 RPM if I recall. I have LT 265 70 R16's. Peak torque is at somewhere above 4000 rpm (can't recall right now). The engine is made to rev so I don't worry too much about being above 3000 RPM, but yes, it would be great to have a bit more torque.

Yeah mine is 6280 dry. 7300 to 7500 is loaded tanks and ready for 5 days of camping. I suspect I just shy of 7000 with empty tanks. I don't see 3500 RPM unless I hit a good size hill/grade or I am hitting the on ramp.
But the 3500 rpm is nothing for a 6.0. LS based motors will live at 5000 rpm forever.

 

[clinebarger]

Originally Posted by maxdustington
GM is going to need a new diesel design pretty soon, maybe they will try to corner the market on big gasoline V8s in 3/4 tons while they work on a new diesel engine.


Why do you keep posting this over & over again? The LP5 Duramax IS new!!

 

[ls1mike]

Originally Posted by clinebarger
Originally Posted by maxdustington
GM is going to need a new diesel design pretty soon, maybe they will try to corner the market on big gasoline V8s in 3/4 tons while they work on a new diesel engine.


Why do you keep posting this over & over again? The LP5 Duramax IS new!!

I was going to ask the same thing, but you covered it before.

 

[ls1mike]

From the article I posted.

The Duramax engine was introduced for the 2017 model year. As such, it is still considered a rather new powerplant that is still highly competitive against the PowerStroke V8 Diesel in the Ford F-Series Super Duty as well as the Cummins I6 in the Ram Heavy Duty.

 

[userfriendly]

I put on about 1,000 miles a week on a company owned 2016 2500 CC SLE. The 4:10 gear is lower than needed and I think it hurts the fuel economy. Higher 3.73s are optional, but only with fleet orders.
Horsepower means nothing to me if it peaks at 5,000 RPM and above. I drive the torque curve and that's where the 6.0L is wanting. My last 3 trucks; 06 3500 LBZ, 2011 2500 LML and 2018 3500 L5P.
If the new 6.6L gasoline engine could split the difference between the 6.0L and a Diesel with improved fuel economy it would be a win win.