Truckers, lets see your rigs!

BRE said:
Jesus this thread is getting dumb


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I agree, bunch of guys way behind the times think that rules of thumb from 10+ years ago still apply. Downspeeding has been around for a while I'm shocked this isnthe first you guys have heard about it. Hey have you guys heard of this thing called an electronic engine?

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does that 9mpg figure include all the miles spent behind a tow truck? I'm not behind the times, I have common sense.....I owned and operated a truck, these manufacturer "real world" numbers are complete sh!t
 
what happens when these new trucks start pulling over 100,000 pounds through mountainous regions such as the one I live in? care to guess?
 
allan5oh said:
I agree, bunch of guys way behind the times think that rules of thumb from 10+ years ago still apply. Downspeeding has been around for a while I'm shocked this isnthe first you guys have heard about it. Hey have you guys heard of this thing called an electronic engine?

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No you’re a phucking idiot.
All my stuff in the beginning was in regards to a c-15, single turbo Cat.

I personally have no use for your science and math equations in trucking. Therefore as a matter of fact, the rule of thumb from 10 years ago still applies in my scenario.


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BRE said:
No you’re a phucking idiot.
All my stuff in the beginning was in regards to a c-15, single turbo Cat.

I personally have no use for your science and math equations in trucking. Therefore as a matter of fact, the rule of thumb from 10 years ago still applies in my scenario.


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So you're comparing an engine with unit injectors and fairly early in the realm of electronics and applying that to engines running common rail and that are designed to run lower rpm? No wonder you're confused.

The older unit injector engines would hammer themselves apart at those rpms.

Volvos downsped engines have been out for 6 years. Cummins 4. This is nothing new.

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you'd think after that many years, cummins and Volvo could figure out how to build an engine that didn't require a trip to the dealer every week. :umno:
 
Emission equipment is the reason for low rpm recommendations. EGT stays higher so you dont have to regenerate all the time. High rpm just pumps excess air through engine and cools DPF. New Detroits should be same all around the world, they are geared usually to cruise around 1200 rpm and pull down to 1000. Over 1500 rpm they start to drop torque so it's a waste to rev them much higher, they are not going anywhere up there, just wasting fuel. I think Paccar was 950-1450 range.
 
Read carefully... I don’t care, not did I bring up your “downsped” crap. I truly don’t... i made one comment about an isx surviving at 1100. I don’t care about it... my questions were once again, in regards to a single turbo, c-15 cat... because apparently I need to tell you again.


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Sorry, Paccar is 900-1365 rpm
 

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Leiffi said:
They beat all older trucks.
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:umno: I'm speaking with firsthand knowledge on the subject, not internet speculation...... not one single MX, DD, or Volvo can get within a mile of a CM870 or a C-15 on a mountain pass, in regards to reliability, or even fuel mileage.
 
hell, a stock 3406B will hand an x15 or a paccar MX its @ss on a hill. and those engines are fricken dinosaurs
 
Mr.T said:
:umno: I'm speaking with firsthand knowledge on the subject, not internet speculation...... not one single MX, DD, or Volvo can get within a mile of a CM870 or a C-15 on a mountain pass, in regards to reliability, or even fuel mileage.
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Not if you are trying to make power at 2000 rpm because they dont. Learn to drive modern engines.
 
This has gotten very very dumb in a hurry. I talk to/sell to/support/help diagnose etc to drivers with emissions trucks every day all day long. You keep running emissions engines at low RPM. The guys who want their chit to last will keep the RPM up.

It is hilarious to think of emissions engines in mountainous terrain. Everybody we deal with in the mountain regions have Cat products and they are happy. The select few who bought an ISX "for a good deal" in those regions are crying to us about their repair bills.

I would love to know how much real world usage data you have about the x15 alan. You clearly have sticky brochures piled in your bunk if you are here preaching about how great that is already.

edit: Since when are we all saying to run the engines at 2000 rpm? We said do not drag them down to 1200 and below. Please tell me you guys aren't here telling us the euro trash on the roads are more reliable and more powerful.
 
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Mr.T said:
:umno: I'm speaking with firsthand knowledge on the subject, not internet speculation...... not one single MX, DD, or Volvo can get within a mile of a CM870 or a C-15 on a mountain pass, in regards to reliability, or even fuel mileage.
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LOLOLOLOL uh yeah.... wow.
 
Zach... they are. They also live at 950-1300rpms and that’s all the faster they need turned.


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Mr.T said:
low RPM driving seems to be a type of bragging right for some people. "my truck will pull 80,000 pounds up a 7% grade at 1100RPM!" well sure......it CAN.....you can also f*** your cousin, but just because you CAN, does not mean you SHOULD.

cylinder pressure, EGT's, and harmonic vibrations become a serious issue when your expecting full power from an engine at low RPM's.
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This is the first post talking about pulling at 1100 rpms. There are tens of thousands of trucks on the road today that do exactly this without issue.
 
zfaylor said:
This has gotten very very dumb in a hurry. I talk to/sell to/support/help diagnose etc to drivers with emissions trucks every day all day long. You keep running emissions engines at low RPM. The guys who want their chit to last will keep the RPM up.

It is hilarious to think of emissions engines in mountainous terrain. Everybody we deal with in the mountain regions have Cat products and they are happy. The select few who bought an ISX "for a good deal" in those regions are crying to us about their repair bills.

I would love to know how much real world usage data you have about the x15 alan. You clearly have sticky brochures piled in your bunk if you are here preaching about how great that is already.

edit: Since when are we all saying to run the engines at 2000 rpm? We said do not drag them down to 1200 and below. Please tell me you guys aren't here telling us the euro trash on the roads are more reliable and more powerful.
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bingo. the new engines DO NOT WORK in the PNW where I live, I literally watched them disappear in my mirrors for years, still see it all the time when I drive on my free days. they're gutless no matter where you shift them, the fuel mileage is horrendous, and the DPF's are constantly needing service. I put 1/4 of a million miles on a truck with an MBN, later converted to 6NZ, running 100,000 pounds gross weight, RARELY had any mechanical issues, rarely dipped below 5.5MPG, and had 650hp to play with. I literally do not care what the "new engine" mouthbreathers have to say, I've seen their performance first hand, and I've seen it for years every single day. you've got to either be delusional or mentally handicapped to think these new engines are worth more than scrap steel and plastic.
 
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