2 questions

[Rawze]

(01-12-2020 )Chamberpains Wrote:  Damn, I missed that link Rawze removed. I was curious what crap habits they are pushing these days. If someone can PM that link, I'd appreciate it. Sometimes knowing what bad habits people use can help a guy diagnose problems with the truck.

it hammered using the cruise control as much as possible + the lowest rpm you can get away with. -- sounds just like a fleet manager at a mega-fleet wrote it.


--There are 2 ways to reduce overall fuel consumption in an already healthy truck/engine. They BOTH involve the same thing ... REDUCING POWER OUTPUT of the engine.



1) - lug the crap out of the engine at as low rpm as it will let you and hold your foot to the floor. <- this is the mega-fleet way of forcefully making their drivers who only know one position on the fuel pedal to reduce power output. Hence, why a tall geared truck is more fuel efficient when you got some moron who can't keep his foot from the floor ... because the thing can't get out of its own way because it cannot produce full power to the wheels when driven like that. The higher torque demand is hard as hell on the engine, shortening its life significantly, and saves fuel at the expense of the engine and drive train.

2)- Backing off the accelerator when using a better rpm range that is not damaging to the engine.



550-hp truck can go up the same hill, 2 different gearing, get to the top at the same exact time, have the same fuel consumption when say ...

A - geared tall) - running 1200rpm, 1850 torque (423-hp applied to the wheels). Foot to the floor. Tall gearing. hard on enigne/driveline/truck.

or...

B - not geared tall) - running 1650rpm, 1346 torque (same exact 423-hp applied to the wheels). Foot backed off to about 70% on the pedal, reduced boost. - Better gearing ratio. reduced engine/driveline wear.


--= THEY WILL REACH THE TOP OF THE HILL AT THE SAME TIME!!! ==- THE SAME AMOUNT OF WORK WAS PERFORMED, THE SAME AMOUNT OF FUEL GOT THEM THERE, all other factors aside!.



A- geared tall)- Is hard on the engine, driveline, and produces a lot more heat in the enigne/drivetrain. it saves a bit of fuel, but long term maint. costs go way up / engine life cut almost in half usually.

B- not geared tall)- Same fuel consumption. Same time to arrive to the top of the hill. - The output power to the wheels is the exact SAME as "A"!.

So,.. for someone not knowing how to drive without their foot all the way to the floor + can;t drive it much above about 1400rpm even if they wanted to (geared too tall for anything useful)...> A) would be more fuel efficient (hence all the goddamn tall geared trucks these days that can't get out of their own way). It is idiot proofing the truck, gutting its full power output potential at the expense of the life of the truck/engine. - ALSO why I would not buy a used truck with those ridiculous tall rears. <- It is already slated for an inframe at 450k - 500k miles / slap worn out.


B - not geared tall)- ON THE OTHER HAND -- DOES TAKE SOME ACTUAL DRIVING SKILL and some discipline to NOT USE that extra power if it is there for use, if a person wanted to save the same (or more) fuel as the idiot proof truck. -- IT BECOMES A CHOICE, delegated by ONE'S OWN RIGHT FOOT!


So... The next time you got someone arguing with you about how all his buddies with their taller rear trucks use less fuel ... -- IT IS THAT SAME SOMEONE THAT CANNOT FIGURE OUT HOW TO DRIVE A BETTER SPEC'D TRUCK PROPERLY! -- THAT IS THE PROBLEM! -- Don't blame it on the gearing... it is NOT THE ISSUE!. - IT IS THAT PERSON'S RIGHT FOOT that is the issue. -- ALSO, THE BETTER SPEC'D TRUCK WILL PERFORM MORE OVERALL WORK OVER ITS LIFETIME THAN THE CRAPPY SPEC'D ONE! --- it has a higher up-time because it is not being abused. Engine will last longer and have less issues + all sorts of other benefits long term that are not seen from day to day.

A TRUCK GEARED AND SPEC'D PROPERLY FOR THE OPERATION AT HAND and dicipline, slowing down BY CONTROLLING ONE'S OWN RIGHT FOOT, driving by your BOST GAUGE (instead of some terrible tall gearing is forcing you to do) === HIGHER PROFITS BY A LONG SHOT above some crappy nut-less garbage rear ended P.O.S. destined to be in a shop getting inframed 2x more often than it should be.

Tags:

tall rear, tall gearing, geared too tall, rear ratio