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  #25  
Old 06-20-2016, 10:56 AM
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Re: Why does MDS suck so bad?

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Originally Posted by firstjeeplast View Post
I think the big question is do you see anything gained from MDS? And I would say only benefit is to decrease fuel consumption.....
Correct, that's the only benefit of the system. It isn't doing, or trying to do, anything other than save fuel.
As for my savings, I notice about about a 3 mpg improvement in the Ram with it on. The Charger is around 5 mpg better with it on. Neither of those are ground breaking improvements, but I suspect they would be slightly higher if I drove long stretches on the interstate where going to 4 cyl mode really makes a difference. Also as you mentioned, driving habits certainly play into it. If someone is hammering the gas to get it out of MDS, they're likely going to use more fuel during the brief WOT blast than they saved by having 4 cylinders shut down for 1/2 mile or something.
You can feather/baby a Hemi to get it to produce some pretty good MPG numbers, but then none of us have bought a V8 to hypermile it.

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  #26  
Old 06-20-2016, 01:05 PM
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Re: Why does MDS suck so bad?

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Originally Posted by firstjeeplast View Post
I think the big question is do you see anything gained from MDS? And I would say only benefit is to decrease fuel consumption. I actually had no change in my mileage or slightly better with it off. Thats my own personal driving habits.
What kind of mileage are you getting? My first 2 tanks of gas I was in sport mode all the time with it off and I was getting 14/20. The last 8-10 tanks in auto with eco mode on I have been getting 15.5/21.
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  #27  
Old 06-20-2016, 02:25 PM
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Originally Posted by El Jefe View Post
What kind of mileage are you getting? My first 2 tanks of gas I was in sport mode all the time with it off and I was getting 14/20. The last 8-10 tanks in auto with eco mode on I have been getting 15.5/21.
??? Be careful, the SRT police might send u a cease and desist letter....

"Dear SRT Owner, UConnect tells us that your MPG is more in line with 5.7l non-SRT vehicles. We recommend you decrease your avg MPG to proper SRT fleet levels (the more below 13 the better) or stop by your local CDJR dealer for trade-in."

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  #28  
Old 06-20-2016, 04:04 PM
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Re: Why does MDS suck so bad?

Ill just send them my burnout photos or my half mile racing video where I run it up to 130

Wait, probably shouldnt send them those photos...
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  #29  
Old 06-20-2016, 04:10 PM
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Re: Why does MDS suck so bad?

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Originally Posted by El Jefe View Post
Ill just send them my burnout photos or my half mile racing video where I run it up to 130

Wait, probably shouldnt send them those photos...
I knew the truth but you served yourself up commenting on MPG and SRT in the same convo...

i, too, get great mpg on highway trips with my human nanny, the Mrs., on board...once in a while she grins while she is shrieking
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  #30  
Old 06-20-2016, 04:52 PM
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Quote:
Originally Posted by El Jefe View Post
What kind of mileage are you getting? My first 2 tanks of gas I was in sport mode all the time with it off and I was getting 14/20. The last 8-10 tanks in auto with eco mode on I have been getting 15.5/21.
I don't see a gain in mpg but now I have aftermarket stuffs like headers etc. So MDS is off. I will say from when it was on it made accelerating awkward sometimes and in my opinion drone even with stock setup. I wasn't a fan of MDS with stock setup and when I just had BORLA axle back with MDS off the mileage on a 75 mph road trip was the same.
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  #31  
Old 06-21-2016, 11:42 PM
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Re: Why does MDS suck so bad?

I prefer MDS. There are times I granny the Jeep for MPG's (highway driving more than anything - but sometimes if I am not in a hurry). It makes up for all the WOT runs I do, which is almost certainly every time I drive it.

There is a slight hesitation that can be felt when it is on the verge of wanting to stay in 4 cyl and jump into 8 cyl. And at highway speeds I can feel it lurch forward during the transition where it gets the extra power. Since I have redone the full exhaust, passengers quickly noticed when the transition occurred at freeway speeds and asked if something was wrong. With a full exhaust, the engine lets out a, sometimes, very loud grunt when it kicks into 8 cylinders. Just depends on the speed and required throttle increase, but it is really noticeable in my SRT with the mods. I don't mind it one bit though.
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  #32  
Old 06-22-2016, 06:50 AM
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Why does MDS suck so bad?

Just an update here.

After doing some more research, I came across suggestions to do a "throttle calibration" to smooth out the lag of MDS. While throttle calibration is a known procedure for many vehicles, there seemed to be a lot of back and forth over whether it actually works for the WK2. However, quite a few owners reported it very effective and it is a simple procedure so I figured I'd give it a try.

According to what I found, you put the vehicle in run mode --- without the engine on. After the warning lights disappear you slowly depress the gas pedal to the floor and release three times. Then hit the push button to off.

I don't truly know if this did anything but I can say that my throttle is significantly more responsive and MDS is nowhere near as noticeable or clunky. It is really a night and day difference.

Anyone else ever hear or know more about this?


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  #33  
Old 06-22-2016, 08:50 AM
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Re: Why does MDS suck so bad?

Well I hate to be the barer of bad news, but that's not doing a throttle callibration. All you just did was reset your Oil Change Indicator. Your computer tracks duty cycle (time on, throttle positions, etc) to determine the life of the oil. The system tracks when you should change the oil based computations related to your specific use. When it's time for an oil change the light turns on telling you it's due. Once you change the oil, you perform the above cycle, and it restarts tracking the life of the new oil.

This has been how you reset the oil life indicator for years now on Dodge and Jeep vehicles equipped with it. For further it should be in the area of page 298 of your owners manual.
Though the mentioned perception of increased throttle response, and decreased lag tells me there was a definite placebo affect. Which further tells me that the MDS transition may not be as bad as assumed, but when you're "searching" for it, it's much more obvious. IDK, just kinda spit-balling here.
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  #34  
Old 06-22-2016, 10:40 AM
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Why does MDS suck so bad?

Quote:
Originally Posted by Shots View Post
Well I hate to be the barer of bad news, but that's not doing a throttle callibration. All you just did was reset your Oil Change Indicator. Your computer tracks duty cycle (time on, throttle positions, etc) to determine the life of the oil. The system tracks when you should change the oil based computations related to your specific use. When it's time for an oil change the light turns on telling you it's due. Once you change the oil, you perform the above cycle, and it restarts tracking the life of the new oil.

This has been how you reset the oil life indicator for years now on Dodge and Jeep vehicles equipped with it. For further it should be in the area of page 298 of your owners manual.
Though the mentioned perception of increased throttle response, and decreased lag tells me there was a definite placebo affect. Which further tells me that the MDS transition may not be as bad as assumed, but when you're "searching" for it, it's much more obvious. IDK, just kinda spit-balling here.

Lol who knows?!! The Internet is full of good and bad info!! I don't use the oil change indicator anyway. I go by miles and it's fairly easy for me to remember!

Regarding MDS, I have no idea. I'm not the kind of person who goes looking for things wrong but trust me there was no missing it. Sounded and felt like the vehicle was in the wrong gear.

Anyway I'm just gonna continue to slap it into sport and enjoy the hell out of it!!


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  #35  
Old 06-22-2016, 11:27 AM
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Re: Why does MDS suck so bad?

Quote:
Originally Posted by sost1sg View Post
Lol who knows?!! The Internet is full of good and bad info!! I don't use the oil change indicator anyway. I go by miles and it's fairly easy for me to remember!

Regarding MDS, I have no idea. I'm not the kind of person who goes looking for things wrong but trust me there was no missing it. Sounded and felt like the vehicle was in the wrong gear.

Anyway I'm just gonna continue to slap it into sport and enjoy the hell out of it!!


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no worries, many of us who lightly mod swear by our "butt" dyno's....I am quite sure a real dyno would expose us

have you looked into this?

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  #36  
Old 06-22-2016, 11:32 AM
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Re: Why does MDS suck so bad?

Quote:
Originally Posted by Shots View Post
Well I hate to be the barer of bad news, but that's not doing a throttle callibration. All you just did was reset your Oil Change Indicator. Your computer tracks duty cycle (time on, throttle positions, etc) to determine the life of the oil. The system tracks when you should change the oil based computations related to your specific use. When it's time for an oil change the light turns on telling you it's due. Once you change the oil, you perform the above cycle, and it restarts tracking the life of the new oil.

This has been how you reset the oil life indicator for years now on Dodge and Jeep vehicles equipped with it. For further it should be in the area of page 298 of your owners manual.
Though the mentioned perception of increased throttle response, and decreased lag tells me there was a definite placebo affect. Which further tells me that the MDS transition may not be as bad as assumed, but when you're "searching" for it, it's much more obvious. IDK, just kinda spit-balling here.
My 2014 SRT either has its mind set of 6K intervals, or there is no duty cycle calculator on this vehicle. I think my 2015 SRT Charger had it because it wanted changed around 5,500... not exact but thereabouts. The Jeep has been exactly 6K the past 2 times.
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