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SVR - Fuel economy VS Driving mode and exhaust valve

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Old 07-13-2021, 06:47 AM
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Default SVR - Fuel economy VS Driving mode and exhaust valve

Hello folks!

I read on another post that the 3 driving modes we have on the SVR, among other things, change the power distribution between front and rear.
According to your experience, which one causes the lowest fuel consumption?
Being Dynamic mode 90% RWD I tend to think that this is it, provided that one changes the gears at the same rpm as he would in Standard mode.
Also, "Snow" mode should be the least efficient with 50% RWD / AWD.
Am I wrong?

Also, how does the exhaust valve setting enter into this equation? It should increase the consumption a little (by how much?), but besides this, is there any benefit in terms of performance or drawback in terms of wear / reliability in keeping it open?

Thanks a lot for any clarifications you may provide!
 
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Old 07-13-2021, 09:52 AM
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Presumably there are published consumptions for AWD vs RWD.
I assume AWD is less efficient?
Not sure about this but doesn't the snap crackle pop come from unburned fuel in the exhaust?
If so, fuel is being consumed inefficiently just to create (great sounding) noise.
 
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Old 07-13-2021, 10:49 AM
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That 90% number is not accurate. The F-TYPE AWD sends 100% of the power to the rear wheels unless they lose traction.
Operating on the torque-on-demand principle, the AWD system sends 100 per cent of the engine's torque to the rear wheels under normal driving conditions. This maintains the F-TYPE's rear-wheel drive handling characteristics and also reduces parasitic losses in the drivetrain.

If the system determines that the rear wheels are approaching the limit of available grip the electronically-controlled centre coupling transfers torque to the front axle, improving traction.
 
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Old 07-13-2021, 12:08 PM
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Originally Posted by LilyKalendar
According to your experience, which one causes the lowest fuel consumption?
Why are you worrying about fuel consumption if you're driving an F-type? There are many boring cars out there that are more frugal.
 
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Old 07-13-2021, 12:15 PM
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Lowest fuel consumption is when you just leave the cat in the garage and stroke it.
 
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Old 07-13-2021, 01:22 PM
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Originally Posted by scm
Why are you worrying about fuel consumption if you're driving an F-type? There are many boring cars out there that are more frugal.
I think it's a fair question. I've driven down I-5 for several hours from Sacramento to Paso Robles and there aren't exactly turns on that road. I stuck the cruise control at x MPH, had the car in standard mode and got better than 28 mpg. I made up for that once the road got my interesting towards the coast.
 
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Old 07-14-2021, 09:38 AM
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We just finished our first road trip in ours. Heading to Colorado, our best mpg was 28.1 according to the journeys app and on the way home between Pueblo and Dalhart we averaged 32.1, again that's coming from the journey's app. Pretty sure we were in "normal" mode w/ exhaust valves open.
 
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Old 07-14-2021, 07:16 PM
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I get 26-28mpg best for a reasonably clear highway run. 12-16 around town for short start stop journeys.
 
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Old 07-15-2021, 04:12 AM
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Originally Posted by BritCars
I get 26-28mpg best for a reasonably clear highway run. 12-16 around town for short start stop journeys.
You guys really aren't trying hard enough! I set my display to show instantaneous mpg and the best I've got is 3! Though it is impressive to cruise downhill off the throttle at legal speed limits at 99 mpg.
 
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Old 07-15-2021, 09:37 AM
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Originally Posted by scm
You guys really aren't trying hard enough! I set my display to show instantaneous mpg and the best I've got is 3! Though it is impressive to cruise downhill off the throttle at legal speed limits at 99 mpg.

LOL

So its like golf, lowest number wins.

I'll try harder next time I have her out.
 
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Old 07-15-2021, 10:32 AM
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Originally Posted by scm
You guys really aren't trying hard enough! I set my display to show instantaneous mpg and the best I've got is 3! Though it is impressive to cruise downhill off the throttle at legal speed limits at 99 mpg.
My best for a tank of gas was 4.5. That was 81 miles from full to empty.
 
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