Governed Speed???

Don’t know how to do the link deal from my phone,but here the steer tire I run. Looks to be 75mph. I would guess the tire manufacturers have at least a 10% cushion built in.

 

Only partially true. Dealers (and others with the right software) can over ride the password. My last truck was a fleet sale. When I told freightliner to turn to open it up and remove any restrictions. They asked for password, I didn't have or know it. So just showed them registration that showed me as the registered owner. They plugged in and override password. Dont no if diesel Dr and others can do that, but dealers can.

 

First this software is NOT make and model specific. It is put out by the engine makers. I am not fully privy to the ins and outs of how this is done. As to overriding I would imagine a dealer once they verify they are dealing with the vehicle owner can "re-flash" the system if needed and set it all back up with a new password. I suspect this requires very tightly controlled software and proprietary hardware and is not something just anybody can do. However my point about the system software logging the connection is a fact. This is one subject that I can honestly say what I don't know about it greatly outnumbers what I do. I do know a guy that is a retired diesel mechanic that knows how this is done. Someday I might give him a call.

 

There seems to be some confusion on password protection. Some parameters like idle time. pedal speed, and cruise speed , pto speed are user progammable or set at default.and can be changed to what works for the user.
Factory setting for rpm horsepower rating and such are factory password protected but with the proper equipment can be changed.
Clear as mud?

 

So I noticed that over the last year or so a lot of the carriers you commonly see out there including many of the large ones have been turning them up a bit. Even JB Hunt went up to 65mph from 62mph company trucks. I noticed Crete has turned them up and Werner went from 64mph to 68mph. The latest additions to those turning trucks up seems to be Prime and TMC... I was wondering why they were doing it when I heard a segment on Road Dog (SiriusXM 146) about it. It seems there are two reasons, one is about capacity, when this thread was first started back in 2009 there were fuel price concerns that were awful at the time and since we had just the year prior been sent to economic disaster it made sense to be as frugal as possible to survive. Fast forward to 2018 and the best economy that the trucking industry has seen in 50 years and decent fuel pricing and availability. Then add a good measure of new technology along with a industry wide capacity problem last but not least the need for more drivers has created a driver friendly competition of sorts... So I drive for a carrier that has them set at 65 mph, of course since we run super singles tire wear directlu affects actual road speed, so lots of our trucks, if not most, actually run about 64 and some are down to 63.. Usually by the time they get to a consistent 63 it's time for some new drive tires. My boss is being stubborn about it although he is under pressure to raise it. You see, he likes the fuel mileage and who could blame him?

We run 16 thru 19 Peterbilt 579's with PACCAR MX engines that have gone through some evolution even in that short time period. We run a small fleet of half van and half end dump (weird combination,huh?). So I kid you not we have many trucks in our van side getting in excess of 10 mpg! Best on the end dump side is around 9, 9 and a half. Mine is a 2019 and I am end dump.. Mine never gets less than 8.5 and is usually between 9 and 9.3. The new trucks have the new Eaton 12 step auto trans and 2:63 rear single drive axle with a tag which is a whole other source of misery for a dump truck driver. But.... This thing gets that fuel mileage with a East end dump that is not built for aerodynamics! If they have made it to get fuel efficiency, our trucks have it. Soooooo..... Here's the thing, we could run 70 mph and that is the most common speed limit in the midwest now and we could STILL get over 8 mpg and the van guys would still be getting over 9. The way these things are geared it would only cost us according to calculation about .3 to .6 MPG to run the speed limit.... For those of us in end dumps having to hustle loads 5 days a week it could be the difference between getting there in time to load or dump a bit faster resulting in another short haul a week, so there is a real money question for those working on a percentage. The van guys are much more aerodynamic but they work for CPM and the difference would simply be for their own drive comfort mostly.

I think that with all the new safety tech we now have (Bendix Fusion) and the better efficiency specs we should be turned up to at least 68 but if you're going to do it might as well go with the speed limit. Drivers are supposed to be professionals and should drive like their living depends on that CDL and so be responsible about it, actually you can get tickets in a 65 mph truck just as easily as a 70 mph truck. So I do not view that as a factor.. We are now among the slowest trucks left on the interstate now and our driver turnover reflects that to a certain extent. Governed speed, idle time restriction, and having APU's with no inverter requiring the APU to be on to use 110 are some of the most common reasons drivers are talking to recruiters from other companies. Our company will need to start listening to drivers more to correct this. It doesn't have to be about just the governor but it needs to be about other issues drivers have as well... And turning them up would be both appropriate and a sign that someone is listening.

 

AHH Trucking------The only industry i can think of where you are told you have to be on piece work and then limited to how many pieces you can make and it;s not even what the law allows.
I wonder why that is

 

SWIFT, ENGLAND to name a few think they are saving fuel. I transport tractors and drive several different tractors, some are set for 60 and some 75. I normally see the same usage in fuel.IF they are doing it for safety they are creating more issues than solving!

 

Bridgestone R283A @ 75 mph.