Because most of the vehicles here in America are not designed to do 150-180MPH. The drive shafts are only balanced for 120 MPH or less, the wheels and tires will only keep together for about the same, etc...Like I said, Ford designed the Mustang to do 140MPH+, but if you didn't want to pay for the wheels and tires that could handle the speed(the 16" wheels that is) they limit the speed to 130 MPH. If you had bought the cars with the 17" wheels and better tires, you had no speed limiter.

Trucks are governed for similar reasons. The very large tires and wheels on trucks just simply cannot handle 120MPH+ for sustained periods of time. The bigger and heavier your tires are (ex, dually trucks and F-450+ class trucks) the slower your speed will be governed to prevent a possible catastrophic failure.

I also don't get your point about it hitting 115MPH in 3rd gear while still having 4th and 5th left. Most vehicles will reach their top speeds within 3rd or 4th gear. 5th and 6th (sometimes 4th too depending on vehicle) are just highway gears meant to get the RPM's down, increase fuel economy, and reduce engine wear.

The fact that the Corvette will do 200MPH stock, and the Mustang GT will do over 140 is proof enough that the US Government does not impose speed governors. Why would the US government make exceptions just for the certain cars that can and are designed to go faster then most?

 

Just what I want to do, listen to 5000 screaming rpms of V10 for "sustained periods". There's a reason just about every heavy hauler on the planet is a diesel.

Someone else mentioned a later gen V10, I'm assuming because of its increase in HP (and little if any increase in torque), but that extra HP is no way going to make up the difference. My other truck was pulling almost DOUBLE the weight. Two times the weight. That's 1 x2 and I was having trouble staying in the same time zone. And I did let it rev unless you feel 4500 - pushing 5000 isn't letting it "rev out".

Bring up Fords new 6.7 and you've got nothing to talk about. It would flat out tear any V10 Ford made to pieces. I've driven it and it's a scary strong package.

It's all apples to oranges anyway. Torque and HP go hand in hand. The biggest factor "to me", is where in the rpm band is it all supposed to happen. I'd much rather motor up a hill in the 2K rpm band than at 4-5K. I'm happier, the wife and kids are happier, the TRUCK is happier, everybody's happy.

 

This is getting funny now

 

No one is arguing that the diesel isn't more pleasant to tow with. We're arguing that V10 CAN do the same work if you plant the pedal to the floor, turn up the radio and ignore where the needle is on the tach. It will pull just as much as the diesels (besides the 6.7, which nobody is denying can handily outpull the V10), but it won't do it as pleasantly or efficiently.

 

Its a beautiful sound IMO. Makes me grin every time I hear it.

52 HP, 22 TQ and the 5R110 rather than the 4R100 is a bigger diffrence than you think.
The 6.7 is a beast and nothing stock will touch it.
400 HP 800 TQ

It will not rip ANY V10 to peices though.

 

I am.

 

I am gonna call BS on this.

But regardless of me calling BS, the PSD is at a disadvantage when not pulling at speed. The reason being windflow and the effect on EGTs. Diesels need airflow to reduce EGTs, so when you romp on it from a standstill, especially with weight, the EGTs skyrocket until the speed gets up a little.

 

Uh Bill and Josh keep saying the v10 will outpull a 6.4, which isn't true. LOL

 

Well, then we are in agreement for most of it

I can believe a spit out plug can cost that much, with the wrong plug it will shatter and go into the piston. If you keep driving, it will tear up the side of the wall. Most of the ones I've seen on the forum though just pull over, get it towed and fix it at the shop resulting in lower costs. It's kind of like when you have a flat tire, if you stop immediately, you might be able to salvage it. You keep driving it and eventually you'll shred the tire have to buy at least 2 new ones.

 

I pulled 12k trailer up the mountains here in WV at 70 mph (the speed limit). I was probably approaching 19k lbs combined. Sure it was noisy, mpg was a joke at best (6mpg), but the truck did it. A PSD would have done it easier no doubt, but the V10 maintained the speed limit, although I did slow down from time to time to negotiate turns, not because the truck couldn't take it.

But I didn't tow often, my truck was 90% DD and 10% tower so the high RPM and low mpg really didn't bother me because it was infrequent.

However, I no longer have that truck and trailer. So for now I'm sitting back and am going to see how the 6.7 reliability is, maybe I'll get one in a few years.

 

the 6.4 will chew one up, too.

 

Not at all.

 

Bill, support that comment.

 

yeah, please do. I havent looked at this thread in awhile and would like to see more bench racing.

 

I've posted the videos several times.
They're the same towing the same loads. No "chewing up" anything.
JL