Still NOT getting the MPGs I'd hoped for!!!
#121
Another way to get a vehichle to move a bit quicker with less throttle is to lower the rear gear ratio.
This creates mechanical torque mutiplication to move the weight with less effort.
Problem is at road speeds the motor will turn a higher RPM so again there is a compromise between rpm and less throttle that may or may not result in sleightly better fuel mileage, depending on the driver.
The point that the least amount of throttle opening is needed to maintain the desired speed is the best that can be done.
After that, the weight has to be reduced, the engine compression would have to be increased, best fuel used, drive train losses minimized and on and on.
An owner cannot re-engineer to those degrees without expending a lot of money and test time to arrive at a gain of a few percent in mileage that may cost thousands to accomplish.
Be assured the factory would get the mileage if it were that easy to do.
Notice that even today the mileage is still not that much higher with the new trucks.
Changing air intake, headers and custom programming could result in about a 40 hp gain but if your after fuel mileage, power is not the only thing your after. It's efficiency.
Again the only way is to lighten up the weight and burn the fuel more efficiently. A rise in compression gains efficiency in all rpm ranges but other factors come into play to limit how far this can be taken with the cost and the fuels available.
It makes no sense to spend hundreds on an air intake system and filter that can makes no improvement at low rpm where the stock hardware flows well more than enough air.
It takes at least 10 hp to be felt by the seat of the pants dyno so most mod attempts never attain the min of 10 hp to be close to effective and worthwhile.
Want the best fuel mileage, get a short wheel base 2w drive and lighen it up as much as you can, if you still want a truck you can haul some with.
That's why small cars with little motors get the big mileage number.
This creates mechanical torque mutiplication to move the weight with less effort.
Problem is at road speeds the motor will turn a higher RPM so again there is a compromise between rpm and less throttle that may or may not result in sleightly better fuel mileage, depending on the driver.
The point that the least amount of throttle opening is needed to maintain the desired speed is the best that can be done.
After that, the weight has to be reduced, the engine compression would have to be increased, best fuel used, drive train losses minimized and on and on.
An owner cannot re-engineer to those degrees without expending a lot of money and test time to arrive at a gain of a few percent in mileage that may cost thousands to accomplish.
Be assured the factory would get the mileage if it were that easy to do.
Notice that even today the mileage is still not that much higher with the new trucks.
Changing air intake, headers and custom programming could result in about a 40 hp gain but if your after fuel mileage, power is not the only thing your after. It's efficiency.
Again the only way is to lighten up the weight and burn the fuel more efficiently. A rise in compression gains efficiency in all rpm ranges but other factors come into play to limit how far this can be taken with the cost and the fuels available.
It makes no sense to spend hundreds on an air intake system and filter that can makes no improvement at low rpm where the stock hardware flows well more than enough air.
It takes at least 10 hp to be felt by the seat of the pants dyno so most mod attempts never attain the min of 10 hp to be close to effective and worthwhile.
Want the best fuel mileage, get a short wheel base 2w drive and lighen it up as much as you can, if you still want a truck you can haul some with.
That's why small cars with little motors get the big mileage number.
#122
Correct me if Im wrong
#123
to my knowledge they are no longer required to tell you the amount of ethanol in the gas therefore most places you get gas have atleast 10% ethanol now and dont disclose it. they make gas cheaper that way and make more money that way and you can thank the greenies for worse gas mileage
Correct me if Im wrong
Correct me if Im wrong
#124
Yea, I knew of one station that was E free. Thanks for that site jethat...I just learned of a couple more! I think I may try a tank of E free next just to see. COMMON Sense would dictate that I'd HAVE to see an increase going from ethanol to ethanol free...all other things being equal--DirtySCREW
#127
NEGATIVE...I'm running STOCK size tires (265/70R17) but they are BFG ATs. So I know I have a slightly more aggressive tread pattern, but it shouldn't take away 2 or 3 mpgs. Cause there are member on here that HAVE oversize tires / lift and are getting better MPGs.----DirtySCREW
#128
#129
NEGATIVE...I'm running STOCK size tires (265/70R17) but they are BFG ATs. So I know I have a slightly more aggressive tread pattern, but it shouldn't take away 2 or 3 mpgs. Cause there are member on here that HAVE oversize tires / lift and are getting better MPGs.----DirtySCREW
#132
NEGATIVE...I'm running STOCK size tires (265/70R17) but they are BFG ATs. So I know I have a slightly more aggressive tread pattern, but it shouldn't take away 2 or 3 mpgs. Cause there are member on here that HAVE oversize tires / lift and are getting better MPGs.----DirtySCREW
#133
Jbrew---I can't say. I had the "accident" with the truck and I refilled to get a more accurate average. I'm still above 3/4 a tank right now with Eighty-something miles on the tripometer so far that was highway. I'll let you know when I fill up again, but it will probably be a few days after Turkey Day.---DirtySCREW
#134
Jbrew---I can't say. I had the "accident" with the truck and I refilled to get a more accurate average. I'm still above 3/4 a tank right now with Eighty-something miles on the tripometer so far that was highway. I'll let you know when I fill up again, but it will probably be a few days after Turkey Day.---DirtySCREW
#135