I know that. I was pointing out that his camparison was not a great one. I mean he totally had two different trucks. If it was the same truck with the psd and v-10 the diesel would out haul and tow the v-10

 

Besides the V10 being lighter and having more horsepower. Those 4.88 gears will let the V10 rev up nice and quick, right where it makes power.

 

Actually it is a GREAT comparison. Why? Because it is the most aggressive towing rear end you can get for each engine in the CC, 4x4, SRW. In fact you can't even get the same rear ends on the two engines, so what would be the point in comparing trucks that aren't even made. In the PSD you can get 3.31 or 3.55 and the V10 comes with the 4.10 or 4.33. I compared the two rear ends with the highest towing capacity with there relative engines. What else do you want?

 

I'm certainly no expert in such things, but I really don't think I'd want a light truck engine (V10 or psd) in a 33,000 pound rig. But that's just me.

 

The PSD will not help you much until you get into DRW. With SRW, other parts of the truck are limiting factor with towing, not the engine.

EDIT: I will admit the PSD will have an easier time towing, and if that is what you are doing all the time, the PSD might be the way to go. But for those of us that only tow on occasion, the PSD and V10 have similiar towing capacities in SRW form. Same is true with MY 2011 6.2 and 6.7. The 6.7 does edge the 6.2 ever so slightly though.

 

Finally someone who's talking sense

I guess it would be fine on a tow truck, which makes short trips, but for long trips I would certainly want a bigger engine and truck.

 

No, they aren't different trucks. The V10 needs more RPMs than the PSD. The different rear ends are part of what makes the engine work the way it does.

what would be an even more poor comparison is placing the same rear end in the trucks. Why would you want to compare that? Of course the PSD would win because it can make more power with less RPM's. The V10 needs the taller rear end to stay in higher RPM range where it can make power.

Besides, if you put the same rear end in both trucks the PSD guys would cry because the V10 would get close to the mpg the PSd is getting

 

If a PSD has an easier time towing, then it would most certainly have an easier time hauling, or even driving down the road. That's just logic. I've never owned a V10, so I can't say anything about it. (Ignore the comments made by my kid a week ago) However, I DID own an F150 with the 5.4, and my PSD gets much better mileage going to work every day than my F150 could ever dream of. On the same stretch of road doing 65mph my F150 would get 15mpg, while my PSD gets 18+. Some on here say say I'm full of crap, but my numbers are hand-calculated. I set the cruise control, and let it go. When I load the back up with all the stuff I haul on a daily basis the mileage is even better compared to the F150.

That said, if the PSD has an easier time towing, it would then have an easier time doing anything else.

 

I think what a lot of people get hung up on is the difference between "easier" and "faster." The psd wins the "easier" part hands down. The v10 may be working harder and using more fuel at 5k rpm than a 6.4 at 3k rpm, but the v10 will be going faster because it is in the same gear but turning almost twice the rpm's. In order to keep up speed wise, the psd will have to shift to the next gear(where it will lose a lot of gearing, put less power to the wheels and have to work harder than the v10 in the lower gear). Where the v10 will have trouble is in a test like Mike and Matt did, where Mike's 3.73 and 4 speed auto kept him from getting the rpms up enough to make peak power. He would have done a lot better if both had 4.10's instead of 3.73's.

 

These rear gear comparisons don't mean much because the gas engine truck and the diesel engine truck will always select different transmission gears until they reach steady state travel on level ground.

 

I think what a lot of people get hung up on is the difference between "easier" and "faster." The psd wins the "easier" part hands down. The v10 may be working harder and using more fuel at 5k rpm than a 6.4 at 3k rpm, but the v10 will be going faster because it is in the same gear but turning almost twice the rpm's. The engine is spinning faster, drinking fuel, but the truck would be going the same speed. In order to keep up speed wise, the psd will have to shift to the next gear(where it will lose a lot of gearing, put less power to the wheels and have to work harder than the v10 in the lower gear). The twin turbos will spool up, putting 650lb/ft of torque to the transmission, while keeping the RPM's low. The transmission is very well suited in the gearing choices, and the PSD makes power at a low RPM compared to the V10. It's not really working harder, it's working as it was designed to do like the V10 screaming to make peak power. Where the v10 will have trouble is in a test like Mike and Matt did, where Mike's 3.73 and 4 speed auto kept him from getting the rpms up enough to make peak power. He would have done a lot better if both had 4.10's instead of 3.73's. So the V10 will lose when it comes to towing up a hill without 4.10 or 4.88 gears? That seems to be what you're saying, but I'll let you say it. Personally, I'd hate to have 4.88 gears if I had to drive on the freeway for any period of time, so to me the PSD is the better highway vehicle. Puttering around town with occasional hauling or towing would seem more logical for a V10 imo.

 

The more relevant question would be "Why does the V10 need such steep gearing in the rear end to tow the same amount of weight as a PSD with 3.55 gearing?" I think it would have something to do with the powerband.

 

I go with a psd as a better over all towing engine, but not because of the power. From a purely power standpoint, I would have to give the edge to the v10 if both have a 4.10 or steeper. Put a 3.31 or 3.55 in them both and the psd will win any contest hands down. But look at it this way. Take two identical trucks with the same 4.10 gear and same tranny. I don't have any ratios handy, so let's just say the tranny ratios are 3.30, 2.40 and 1.5 for 1st-3rd. Pull out from a dead stop in 1st gear. When both hit 3k rpm the psd is going to have to shift to 2nd while the v10 can keep going in 1st. So now the psd is pulling with a 9.84 final drive ratio and the v10 is pulling with a 13.53. At this point the v10 will pull another 3k rpm before it has to shift and the psd is already at about 2k rpm in 2nd gear and only 1k rpm away from having to shift to 3rd.

With my 5.4 and 7.3 having the same rear end gear and the same tranny gears, I can be in 2nd gear in my 5.4 when my 7.3 has to be in 4th to be doing the same speed. Getting to be 2 gears lower and making the same hp helps a lot when it comes to topping a hill faster.

 

In the type of test Mike and Matt did, yes. But they had an almost 12k lb trailer pulling out from a dead stop on a 15% grade hill. From a rolling start, Mike would have ran right with the 6.0. With a 4.10 he would have kept up even from a dead stop. The v10 works best with a 4.10 and the psd gets by just fine with a 3.55. Put a 3.55 in both of them and the psd will win, but put a 4.10 in both of them and the v10 will win. Nothing wrong with having a 4.10. That's what my 7.3 and 5.4 have and it does great in both of them.

 

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10 days and this baby is 1yr old. What a ride. way to go Bill.