Sport Mode

[Saddle Tramp]

So are you guys using sport mode to manually shift or are you just letting sport mode do its thing by driving like you would in standard drive mode? I wish it would leave the gear display up in sport mode. It switches to the tach in the left display and removes the gears from the right. That makes it hard for me to manually shift for some reason.

When you have it in manually shift, the gear it is in will be displayed on the left by the tach, which also comes up in manual

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[Saddle Tramp]

Plus sign

Or minus

 

[Deleted member 773]

this is overdrive gearing 101.

if you run higher RPM, you're burning more fuel.

so cruising at a set speed on the highway in 8th gear vs 10th gear will undoubtedly use fuel at a different rate. this is why they get fuel economy numbers that they do with 10 speed transmissions. you're not running such an rpm spread with every shift. you keep the motor in as low an RPM range as you can.

in town, zipping around wanting to throw your ass into the seat at every light chirping the tires at the old lady in the Fusion beside you...who cares about your fuel economy or your shift point, you're trading fuel for fun times.

Wrong, with forced induction, boost levels (a factor of engine load) have a greater effect on fuel consumption than gearing alone (within reason.) Fuel economy comes from maximizing the amount of time the engine is at the intersection of performance and fuel economy, not from strictly the rpm. The use of multiple close ratio gears allows this sweet spot to provide maximum power more often. That’s why you can get away with a smaller engine when you switch to forced induction. I could manually hold gears on my tuned f-250 that had a gpm fuel consumption gauge, holding 6th on a steep hill and flooring it to maintain speed would use up to double the fuel compared to allowing it to downshift and stay in the power band. With ten gears, you are that much closer to the sweet spot at any speed.

Other items that increase the ability of this 10 speed to achieve higher fuel economy numbers are the ability to lock the torque converter right after launch and continue to stay locked during shifts. Gear box rotational momentum is increased too as the close ratios Require less rpm changes gear to gear.

 

[Jimiv123]

I don't see why not! The shifter isn't even locked in S, you can nudge it right back to D without squeezing the trigger. If you squeeze you need to make sure you don't skip D and go to Neutral.

Oh good! So it's not just me. Was wondering if something was wrong after I got the shifter recall done. Definitely using sport mode more often.

 

[Hounddog409]

Wrong, with forced induction, boost levels (a factor of engine load) have a greater effect on fuel consumption than gearing alone (within reason.) Fuel economy comes from maximizing the amount of time the engine is at the intersection of performance and fuel economy, not from strictly the rpm. The use of multiple close ratio gears allows this sweet spot to provide maximum power more often. That’s why you can get away with a smaller engine when you switch to forced induction. I could manually hold gears on my tuned f-250 that had a gpm fuel consumption gauge, holding 6th on a steep hill and flooring it to maintain speed would use up to double the fuel compared to allowing it to downshift and stay in the power band. With ten gears, you are that much closer to the sweet spot at any speed.

Other items that increase the ability of this 10 speed to achieve higher fuel economy numbers are the ability to lock the torque converter right after launch and continue to stay locked during shifts. Gear box rotational momentum is increased too as the close ratios Require less rpm changes gear to gear.

Which all means higher RMP = less MPG

 

[Deleted member 773]

Which all means higher RMP = less MPG

No..

 

[Hounddog409]

No..

How exactly do you more combustion per minute without more fuel?

 

[Geoff]

How exactly do you more combustion per minute without more fuel?

With a normally aspirated engine I agree with you....more RPM = more gas. In a turbocharged engine, gas consumption can vary even at the same RPM, depending on Boost. More boost = more gas. Fuel usage is now a function of not only RPM but Boost as well. If you want to maximize your Ranger mileage, you have a light foot on the gas pedal to minimize boost.

 

[Hounddog409]

With a normally aspirated engine I agree with you....more RPM = more gas. In a turbocharged engine, gas consumption can vary even at the same RPM, depending on Boost. More boost = more gas. Fuel usage is now a function of not only RPM but Boost as well.

We are talking RPM. No way are you using less gas at 6000 RPM than you are at 2000 RPM.

 

[Deleted member 773]

How exactly do you more combustion per minute without more fuel?

Rpm and fuel flow are not directly related, there is no set ratio off fuel flow to rpm on any engine. Fuel flow is a function of air flow. Look up how an internal combustion engine works, might help you and grey sky out.

 

[Geoff]

We are talking RPM. No way are you using less gas at 6000 RPM than you are at 2000 RPM.

Yeah, well what about 2000 RPM vs 2500 or 3000?
Boost sucks gas.

 

[Floyd]

How exactly do you more combustion per minute without more fuel?

Electronic direct injection with variable valve timing. Also Electronically controlled twin scroll turbo charger and injectors which can fire multiple times per power stroke.
This is a complex fuel management system in which RPM is only one factor.

 

[VAMike]

We are talking RPM. No way are you using less gas at 6000 RPM than you are at 2000 RPM.

Irrelevant, since going from gear 8 to gear 9 isn't going to drop you from 6k to 2k

 

[tivct]

Rotational friction is linear with engine speed. The faster you're spinning, the more drag you have. Thus, generally, higher gears yield better mileage.

But, with boosted engines, volumetric efficiency also tanks as boost increases. So you don't want to keep engine speed too low and boost like crazy. This characteristic is why people tend to complain about their such & such ecoboost not getting the rated mileage. It's because they're always in boost.

This is where the volumetric efficiency "islands" come from, as someone mentioned in this thread. The 10-speed is calibrated to keep you in the sweet spot of speed and load. Injection timing, valve timing, turbo management, etc, make those islands larger.

 

[Floyd]

We are talking RPM. No way are you using less gas at 6000 RPM than you are at 2000 RPM.

Those are extremes of course but load is what really matters...
Holding 3000 RPM with a 5000 pound trailer will use more fuel than 3000 RPM with an empty truck.
Also pulling a 5000pound trailer may actually use less fuel at 3000 RPM in a lower gear than it would at 2000 RPM to hold the same speed, since maximum torque is produced at 3000 RPM.
I can't cite specifics under specific conditions because there are just too many variables and we all know generalities are always false.

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