Oh yeah,I totally agree with that. It is much easier to get a load moving with a diesel and a manual vs a similarly equipped gas engine vehicle. The diesel's much higher compression ratio makes for an abundance of torque right off-idle.
JL

 

Your jumping over 2 generations, while I'm comparing what's going out with what's coming in. In the 08-10 Super duty SRW, you can only get 3.31 or 3.55, the same rear end choices you have in the new version ('11 and up). The only difference in rear end gearing is that before you could get a 4x2 with a 3.55 and now you can't. So different rear ends is really a moot point since both are available in both trucks.

My point was exactly what you said, the truck will be harder to pull while cruising down the road in 6th gear with the 6 speed than it was in 5th gear on the 5 speed, although the difference may not be as great given the same rear ends. I simply went on to say the new 6.7 can pull this in 6th gear because of the additional power.

I don't think anyone is going to say it is harder to pull with a 4.10 than a 3.31 given the same engine as you are suggesting, even with different trannies.

EDIT: Actually to get a PSD in SRW with a 4.10 rear end, you have to go back to the 4 speed trannies, right? So your comparison is not even valid for stock trucks...

 

If you happen to have a personal problem with me, take it somewhere else. Or, you can PM me and I'll give you my address so we can discuss things in person at a time of your choosing. I'm done responding to your postings, so from this point forward, don't respond to mine, even in the third person like you like to do.

 

How is that his opinion? Historically the main reason to have a low rear end gear ratio was to get stuff moving off the line faster, but it used to be at the expense of highway economy.

With the latest wide ratio spread transmissions you can have a fairly high ratio rear gear ratio for good mileage when cruising (like 3.31:1), but still get great off the line performance thanks to the very low first gear ratio of the new generation of 6 speeds. You couple the torque converter in with a 3.97:1 1st and you have a nearly 8:1 first gear when starting off. However, once the torque converter is locked up and you are up to cruising speed the fairly high overdrive 6th gear (.67:1) and the high rear gears will net you some good highway mileage.

It takes a lot less power then you'd think to push one of these trucks down the road at a constant speed. At 60MPH its only something like 30-40HP.

 

Yes, but that slight increase from the 5 speed tranny to the 6 speed tranny, might work better for the 6.7. Since the 6.7 makes more power, it can push the truck down the road with a taller gear ratio, hence lower RPM's, and save fuel.

At the end of the day, the new 6 speed tranny is about saving fuel to meet the new government standards, and they tossed in a low 1st gear to help take off too.

 

This entire thread has been about all models and years of the psd and the V10 since the day Bill started it. The 7.3, 2v V10, and 6.0 have been well represented in the discussion despite the fact that the 7.3 hasn't been available for 7+ years (in the US), the 2v V10 for 5+ years, and the 6.0 for 3+ years (in a pickup). The capabilities of all engines and gear options are germane to the discussion. If you want to disregard them, that is your call. Some of the rest of us are interested.

If you want current, I'm sure the 6.4 and/6.7 forums have what you're looking for.

 

I agree. However, I think it is a poor idea to compare engines produced and developed decades apart. Reason being is very few people are going to look at buying a 3V V10 or a 7.3. Chance are if you can afford a newer truck, you will buy a newer truck with the best engine for your needs.

It is true, that a select few might even being looking to upgrade from their older truck to a newer truck. They may wonder how the 3V V10 pulls compared to their old truck, but really the more relevant question for them is how does the PSD compare to the same year V10 and is the PSD worth the extra $$$. In some cases people might look at newer 3V V10 versus an older PSD (say 6.0) just because they cost similar amounts, and that might be a valid point.

However, comparing a 7.3 to a 3V V10 is just silly IMO. You are talking about a truck that is close, if not more than, 10 years old to a truck that is less than 4 years old and have a huge price difference. I don't foresee that as being a very big market. You might be able to compare the 7.3 to the 2V V10, but I bet few people are interested in that.

Additionally, when you try to compare engines from such a large span, there will be obvious things that are better. For sure, the engines have become more powerful. I wouldn't compare my old 454 that makes 285 hp and 405 ft-lb to any of these engines. Why? Because it's almost 25 years old and uses ancient technology, it's obvious the newer engines will be better. Why state the obvious when comparing old engines to new ones?

 

I'm glad (most of) you guys got it back on track here

 

This entire thread has been about all models and years of the psd and the V10 since the day Bill started it. All models and years? Except for the last 4, huh?

The capabilities of ALL engines and gear options are germane to the discussion. Except for the 3.55 and 3.31 which are now the standard offerings, and have been for the last 4 years, right?

When this thread was started, the only PSD engine in production was the 6.4! While the first one mentioned by size was a 7.3, if you look at when the comment was written and this thread started, it would only make sense this thread was about the V10 vs 6.4. I haven't discounted or disregarded the 7.3 a single time, but whenever the 6.4 is brought up there are 2-3 people who whine incessantly that they don't belong in this thread. Read the FIRST post and show me where it says this is about the 7.3 and 6.0. It doesn't, and the only PSD engine in production back in 2009 was the 6.4 Liter.

 

I have an idea, can we get back to just discussing PSD vs. V10 instead of nit picking each others posts/grammar to death?

 

I thought there was another big V10 vs PSD thread before this?

 

I don't know...

I think it is worth noting which PSD you are talking about. There is a big difference between the 7.3 and 6.7. And at this point we have pretty much on all other major issues.

 

I totally agree. What I'm suggesting is get back to TECHNICAL discussions, not nitpicking.

 

well now there using the 6.7 so the 6.4 doesnt belong here anymore either according to you! of course its not a powerstroke so in reality now there is no v10 vs psd!


i think it would work much better for a 7.3 as well. it has plenty of power and would see much better results in mpg.

 

No, I'm saying the 6.4 and 6.7 are just as relevant as the 6.0 and 7.3. You can choose to twist my words around to suit you if you'd like, even though the mod said to cool it. I'm sure it's ok with him. They DO still call the 6.7 a Power Stroke though, so perhaps a little reading would help you out on the newer vehicles. Don't believe me? Build one at Ford - Cars, SUVs, Trucks & Crossovers | Ford Vehicles.

Or, just click here... Ford - Cars, SUVs, Trucks & Crossovers | Ford Vehicles | The Official Site of Ford Vehicles | FordVehicles.com There are Power Stroke badges all over it. I'll be interested in seeing how you interpret it, of course.