Re: Can you DIG this mpg ?
[Re: dOc !]
#2806017
08/07/20 05:19 AM
08/07/20 05:19 AM
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Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
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Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
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I gave an honest rep to the situation...
ABSOLUTELY... the MDS shuts off at the slightest incline and the mpg reading does drop off....
The PROOF is a good MPG read on a trip ... I’m planning a trip to the Keys ... and Alligator Alley SR41 has a speed limit of like 55.
In your previously posted picture I could see the RPM, which was about 1650 if I recall. If instead of MDS and 4 cyl mode, running all 8 cylinders with a geartrain ratio that puts the engine at about 1200 RPM with VVT changing camshaft specs to optimum would give an even higher MPG. This would also let the vehicle climb a steeper hill than what MDS can do in 4 cyl mode. But...... on an even steeper incline or when wanting to accelerate and pass another vehicle, the driver In 8 cyl mode would feel the slight jerk of the needed down shift, but MDS goes away with minimum jerk. Over the life of the vehicle MDS probably wastes 1000 gallons of gasoline compared to 8 cylinder with optimum gear ratios. Is it worth this wasted money to avoid the....gasp....horrible mental pain of more frequent shifting? If you understand engine BSFC (brake specific fuel consumption) maps, you are very accepting of more frequent shifts, it gives you peace of mind.
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Re: Can you DIG this mpg ?
[Re: Dcuda69]
#2806028
08/07/20 07:45 AM
08/07/20 07:45 AM
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Joined: Apr 2005
Posts: 4,916 new berlin wisconsin
Mr T2U
master
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master
Joined: Apr 2005
Posts: 4,916
new berlin wisconsin
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The MDS really helps for sure. I have a '18 Mustang GT we just took on a trip out west a couple weeks back. Hand calculated mileage on a couple legs across South Dakota at 80+ miles an hour, cruise and AC on.....25-27 mpg. Not bad for 460 hp with no MDS/DOD..I was very happy! with most modern muscle cars that mileage is about normal for highway driving. i get 25mpg, hand calculated, on the freeway, 70+ mph, on long trips with my 08 Bullitt mustang. has supercharged 4.6 3V motor that makes 650 rwhp on pump 93 octane gas W/ 6 speed tr6060 trans. i get about 18 around town with normal driving. when i drive it like a rental car it's about 3-5 mpg. this is a guess because i never had calculated it.
Last edited by Mr T2U; 08/07/20 07:47 AM.
perception is 90% of reality
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Re: Can you DIG this mpg ?
[Re: topside]
#2806088
08/07/20 10:35 AM
08/07/20 10:35 AM
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Joined: Jul 2008
Posts: 30,424 Florida STAYcation
dOc !
OP
The village idiot's idiot
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OP
The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Back in the '90s, I used to occasionally borrow a friend's Aerostar van to run parts down I-5 between SF & LA. It had an "instant MPG" readout thingie. It was pretty entertaining watching it change when drafting, passing, and clearing big rigs. It was interesting to see the effects of the bow wake those things put out - instant MPG plummeted until you cleared the nose by several feet. These READOUTS are amazing ! ... how those at CTC figure all this stuff out A bit over my head ... maybe tooooo many gel coat fumes ! THX fur the input guyz ... interesting reading ! And those FURDS ! ... they have the upper hand at least for now !!
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Re: Can you DIG this mpg ?
[Re: dOc !]
#2806102
08/07/20 11:16 AM
08/07/20 11:16 AM
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Joined: Dec 2005
Posts: 9,719 Home
SRT6776
I hate internal combustion engines!
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I hate internal combustion engines!
Joined: Dec 2005
Posts: 9,719
Home
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I gave an honest rep to the situation...
ABSOLUTELY... the MDS shuts off at the slightest incline and the mpg reading does drop off....
The PROOF is a good MPG read on a trip ... I’m planning a trip to the Keys ... and Alligator Alley SR41 has a speed limit of like 55.
I climbed hills with mine, you just need to really feather the throttle aka hyper mile it (long inclines on the highway). Remember even in 4cyl its still a 3.2L !
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Re: Can you DIG this mpg ?
[Re: dOc !]
#2806294
08/07/20 08:39 PM
08/07/20 08:39 PM
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Joined: Dec 2007
Posts: 12,587 Great Neck,LI,new york
hemi-itis
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
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OleHam2...did you jsta wake up from yur nap ? I was driving the Scatty like a BABY CARRIAGE! When will you go to the track and drive it like a hell-charger???
HEMI-ITIS has no cure. My condition is fully BLOWN!!
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