I agree that the 6.2 will out pull the V10 but it seems like they could get more low end torque out of it. The new 6 speed auto will make up for most of the difference, so I guess its not going to be a something you really feel towing. I want to see a dyno sheet on the 6.2 to see how much less it has than the V10.

 

Here we are in the age ol' HP or Torque.

They are linked mathematically by rpm.

So, a better way to say it is.....

I like my engine to produce lots of power at low RPM
or I like my engine to produce lots of power at high RPM
and so on....

 

Right, but to say one produces more power than the other is a misnomer, in my opinion, because it's relative to RPM.

 

Good point, Ace, I should have clarified my statement a bit.

I was referring to real world towing rather than matching RPMs for RPMs. We've done the horsepower vs. torque thing dozens of times so I don't think we should dive into that one again.

But anyway, at any point in time a driver with the 6.2L V8 would be able to depress his gas pedal to the floor and send that 6.2 somewhere north of 5,000 RPMs. At which point the engine will be pulling far harder than a stock 3V V10 ever could.

True, when it comes to low end torque the V10 would get the nod, but the disparity isn't going to be that large. This would mean that at the V10 may be able to maintain speed on a grade in a higher gear with less RPMs than the 6.2, but upon a forced downshift at WOT, the 6.2 will always win the race.

So yes, a 6.2 may have to turn 3,000 RPMs in 4th gear to do the same work a V10 with it's 1:1 4th gear may be able to do with 2,600 RPMs.

But what's so wrong with a few more RPMs? Shorter stroke motor isn't going to dislike revs like a long stroke modular, and it's going to be attached to a transmission that won't be bashful about sending it into the stratosphere.

Any which way you look at it, that 6.2 is capable of doing more work faster. Just at slightly higher RPMs!

I agree. Being able to put the motor where it needs to be is half the battle!

 

Just substitute "V10" for "6.2l" and "PSD" for "V10" in the above post and it sounds like an arguement that belongs in the V10 vs PSD thread.

 

Your right, it fits perfectly!

 

heheh...close!

The RPM difference against a diesel would be a bit more significant...

 

Good point, a V10 would have to rev higher than 3,000 to out pull a PSD turning 2,600.

 

The only problem i see witht this is that you will pretty much have to beat on the new 6.2 engine to match or exceed the v10. I really have to wait and see how the 6.2 performs, but ther is absolutely no way in heck that the new engine will get better mileage when turning those high rpms. From my understanding the new engie is going to be a drive it like you stole it affair, and the new trans will be constantly messing with which gear you are in to keep it at high revs. I'm all for seeing how this new engine is. really interested to see how the calibration is for the engine. I hope it has better response than the drive by wire tritons casue they feel sluggish to me due to torqu management calibrations.

 

Well, the new gen F150s are MUCH less sluggish than the previous gen, so I'd be willing to be that lesson learned on the F150 would apply to the new motor for the SDs as well.

And I agree it'll take a few higher RPMs to do the same work, but considering it pulls stronger than the 5.4 all across the RPM range I doubt it'll need to rev as much as you may think.

From what I understand, power levels may be slightly lower than the V10s below 4,000 RPMs, but they'll be darn close. So you may not need the 6,000 RPMs but it sure will be nice to have! I can't WAIT to see a dyno sheet of this new engine!

 

I'm just not interested in towing at 5k RPM's for hours on end. Even with 6 gears, you are likely to see a lot of - can't hold speed in this gear, hit the rev limiter in the lower gear.

This is why the diesel is so good at towing. A very flat torque curve. Spreading 3,000 rpms across 5 gears works better than spreading 6,000 rpms across 6 gears. Especially since they ruined the 6 speed for towing by giving it a double overdrive. You basically end up with 5 useful gears when towing heavy. The new 1st gear is very deep, and that will be good.

 

Well, I think that speaks to the value of the V10 making 90% of it's available torque at 1500 RPM.

And yes, this is the v10 v psd thread all over again

 

Highway towing with a heavy load my V10 runs between 3100 and 4700 the whole trip,
running 3300 most if the time.

Its really not bad for it, thats how it was made to be used.

I don't see any reason why the new 6.2 would not be the same thing, even if it does rev higher.

 

The 6.2 makes 80% @ 1250 RPM, we just need to wait and see what the peak torque is.

No, this is V10 vs 6.2.

Odd thing is that I am sticking up for the 6.2!

 

This all pretty much sums it up. We just need to wait and see. All we have to go on in all this conversation, and in the "Ask the engineer" thread is what has been publicly released. Which is very little. And no one excpet the engineers and a few lucky test drivers have even gotten to look at the new truck, much less drive one. So I have a very hard time with all the people that are condemning the new truck before it's even seen the light of day. How can anyone possibly say it's bad, or good, or indifferent until he drives it, feels it, experiences it? Numbers are one thing, and heresay is a whole nuther thing. But until you sit in the seat and press the gas pedal, you cannot pass judgement on it. You may opine, you may guess, you may wish, but may not pass judgement on it!