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Gm's new 6.6l gas engine

That's barley more power than the l92 6.2.
It better have better mpg than a 5.3 or it was a complete waste of time and engineering
 
You're missing it's intended use and what it's built for. It's made for pulling and working rather than generating big peak numbers. this is the bridge between a DI 5.3 and the Duramax. It's a burlier next gen replacement for the venerable 6.0.
 
The 6.2 was already doing that.

It just seems like they put a lot of time and money into something that they pretty much had.

The 6.2 had 403hp and made nearly 420ftlbs at 4000rpm. With a 10.0:1 cr... I'm not seeing much difference is all I'm saying

Screenshot_20190211-210254.png
 
I’m sure that Fords numbers will be higher, even if in reality they aren’t.
I think GM has done a great job of making the best drivetrain combination for the HD trucks. Claimed numbers are one thing but real world use is another.
(I hope they can get more than 11-12 mpg out of this combo!)
 
This is not a better engine than the 8.1L Look at peak torque 464 at 4 grand? Granted it's better than the 6.0 and smaller LS engines, it's not the same as an 8.1 coming in at 450 lb/ft at 3200 rpm. Sure the 8.1 is down on the numbers, but that is really a minor tune away from smashing what the 6.6 puts out, still at a lower RPM.

The 6.6 needs more juice. The saving grace here is the crosstown rival has woken up to the fact that OHC engines in truck applications never really worked and is going back to what is a damn near copy of the Gen V small block with the DI 7.3. The competition will spur the numbers in the right direction.

It's about time for sure. Plus the more emissions garbage the feds force on the diesel engines the more these bigger gas V8's are going to be more common. I bet somebody within GM powertrain is kicking themselves for not keeping the 8.1L in house and continuing the development of a real big block and not a poked and stroked small block. PSI is moving the 8.1 into the modern realm with 8.8L of displacement and DI technology coming. Too bad they are only going into school buses right now.
 
ZooMad75 said:
This is not a better engine than the 8.1L Look at peak torque 464 at 4 grand? Granted it's better than the 6.0 and smaller LS engines, it's not the same as an 8.1 coming in at 450 lb/ft at 3200 rpm. Sure the 8.1 is down on the numbers, but that is really a minor tune away from smashing what the 6.6 puts out, still at a lower RPM.

The 6.6 needs more juice. The saving grace here is the crosstown rival has woken up to the fact that OHC engines in truck applications never really worked and is going back to what is a damn near copy of the Gen V small block with the DI 7.3. The competition will spur the numbers in the right direction.

It's about time for sure. Plus the more emissions garbage the feds force on the diesel engines the more these bigger gas V8's are going to be more common. I bet somebody within GM powertrain is kicking themselves for not keeping the 8.1L in house and continuing the development of a real big block and not a poked and stroked small block. PSI is moving the 8.1 into the modern realm with 8.8L of displacement and DI technology coming. Too bad they are only going into school buses right now.
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I didn't mean it was better than the 8.1L all around but more that it could be better used in some off-road designs for weight savings while still offering up the grunt a truck needs
 
There is a specific market that needs bigger gas motors and they are not the guys who need max torque or power but longevity. For example the water district I work for can buy HD pickups with a Diesel engine. The air quality mgmt prohibits it within 50 miles of “home/yard” I think. So we get all gas powered F350-550s and even some of our class A trucks are big blocks... it makes no sense to me why they do this but whatever..
Also to your point about lower end torque is almost a non issue, with gearing and 10 splits this thing will be in its peak at all times.. no more is there the massive jumps in gear changing.
 
sreidmx said:
There is a specific market that needs bigger gas motors and they are not the guys who need max torque or power but longevity. For example the water district I work for can buy HD pickups with a Diesel engine. The air quality mgmt prohibits it within 50 miles of “home/yard” I think. So we get all gas powered F350-550s and even some of our class A trucks are big blocks... it makes no sense to me why they do this but whatever..
Also to your point about lower end torque is almost a non issue, with gearing and 10 splits this thing will be in its peak at all times.. no more is there the massive jumps in gear changing.
Click to expand...
That does seem kinda silly but transmission tech is helpful
 
shady said:
The 6.2 was already doing that.

It just seems like they put a lot of time and money into something that they pretty much had.

The 6.2 had 403hp and made nearly 420ftlbs at 4000rpm. With a 10.0:1 cr... I'm not seeing much difference is all I'm saying

View attachment 294520
Click to expand...
+44 lb/ft at the same RPM is significant. That equals +25 across the board
 
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