How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee? - Page 9 - Jeep Garage - Jeep Forum

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  #97  
Old 10-23-2015, 10:24 AM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

I dont understand the point you're trying to make. Are you trying to say that turbo vehicles are more expensive than non-turbo vehicles in ownership and maintenance? Because that is common sense. More performance equals more money to maintain all around. This also applies to non turbo performance vehicles. I had to pay extra for performance car warranty when i purchased my 300C SRT8. Cost me more than it would for a 6 cyl. Common sense.

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  #98  
Old 10-23-2015, 10:32 AM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

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Originally Posted by Keysplayr View Post
I dont understand the point you're trying to make. Are you trying to say that turbo vehicles are more expensive than non-turbo vehicles in ownership and maintenance? Because that is common sense. More performance equals more money to maintain all around. This also applies to non turbo performance vehicles. I had to pay extra for performance car warranty when i purchased my 300C SRT8. Cost me more than it would for a 6 cyl. Common sense.
I'm simply saying for long term, low mileage drivers like myself, turbo's are not worth it because of the relatively short term warranties associated with them. Along with the risk of high dollar repair bills after they time out. As far as performance, if I'm not going to be happy with a 360 H.P high performance 5.7 HEMI V-8, I'll be even less thrilled with a 4 or 6 cylinder turbo in the same vehicle. I can't explain the reasons any better than I already have.
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  #99  
Old 10-24-2015, 01:44 AM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

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How would you know that, unless you had a completely identical engine without MDS, in an identical vehicle to compare it to? With all due respect, saying, "it doesn't do $h!t" in your hands, isn't really saying much as far as judging it's performance.

I have 50K miles on my jeep and if you push the transmission lever to the left, you have a "6" show up on the dash instead of a "D", and the "eco" sign doesn't show up. this means you are not in MDS mode. That would be how I know.
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  #100  
Old 10-24-2015, 07:20 AM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

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Originally Posted by comnjeep View Post
I have 50K miles on my jeep and if you push the transmission lever to the left, you have a "6" show up on the dash instead of a "D", and the "eco" sign doesn't show up. this means you are not in MDS mode. That would be how I know.
"6"? What year and engine is your Jeep?
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  #101  
Old 10-24-2015, 12:48 PM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

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Originally Posted by billt View Post
"6"? What year and engine is your Jeep?
It would be a MY12-MY13. Maybe a MY11, but that would likely say "5" even though it was technically the same transmission.
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  #102  
Old 10-24-2015, 01:02 PM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

From what I've been able look up in regards to the MDS system, (including researching some of the threads here), is that you cannot completely "turn it off" without a chip, along with an electronic tune. On page 50 of my owners manual where it discusses the use of the "ECO" button, along with what it does, there is no mention of the MDS system, or it's operation at all.

My point is I really don't see how the driver can prove one way or another if the MDS is delivering better fuel mileage or not, if there is no way to completely shut it down. Not being in "MDS Mode" or "ECO Mode", does not mean the MDS System stops entirely functioning.
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  #103  
Old 10-24-2015, 03:11 PM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

I believe that billt is correct...you can turn off the "MDS" in the display, but the actual MDS action is generally "permanent" without a special Tune. That's how I understood it from reading the manual and previous commentary in the forums.
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  #104  
Old 10-24-2015, 03:51 PM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

This is a good thread in regards to the MDS System.


MDS Enable/Disable custom switch?
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  #105  
Old 10-25-2015, 12:03 AM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

I can feel when my car is in MDS because there is a very slight vibration, as many have felt, and this corresponds to the eco symbol coming on when on the hwy. Putting the car in tow/haul or "6" instead of "d" will turn off the mds. It is a 2012. I've run full tanks of gas on the hwy in 6 and d back to back (wind is primary factor) to prove to myself that mds does nothing. It does nothing. I'd not pay a dime for it as an option.

Pardon me, please continue the forced induction discussion...

edit; let me clarify something about my situation. I drive fast on western hwys usually 80-90 in interstate and 70-80 on two lanes with a roof pod and rear bike rack and full load WITH Nitto terra grappler tires that worsen MPG 10-15%. I usually get 17mpg doing this. MDS still tried to kick in in "d", but I do not really have a "stock" car.. I have driven enough without the added stuff and oem tires to know in my mind I find MDS not worth it to me...
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  #106  
Old 10-25-2015, 12:12 PM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

comnjeep, MDS isn't going to kick in very much at all when you get up in to those very high speeds because of the power required just to deal with the extra wind-resistance and keeping a 2.5 ton vehicle moving at that speed. For those of us who stick to 65-70, there's likely a bigger benefit...I know I get 20-22 highway and pretty much never exceed 70 mph. Tow/haul does turn it off, but that also affects shifting and may compromise use of OD.
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  #107  
Old 10-25-2015, 12:29 PM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

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Originally Posted by Jim_in_PA View Post
I know I get 20-22 highway and pretty much never exceed 70 mph. Tow/haul does turn it off, but that also affects shifting and may compromise use of OD.
I easily get the same doing the same. But if you're going to drive fast and hard, and tow and haul as well, your fuel mileage is going to be lousy, period. MDS works, and it works well, but if your foot is always in it, you might as well not have it because you'll receive no benefit from it.
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  #108  
Old 10-25-2015, 12:44 PM
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Re: How do you feel about a 2.0L TT as the base engine for the 2019 WL Grand Cherokee

MDS is a kludge that tries to get more from an obsolete cam in block engine. Not a bad engine, just obsolete.

For any of this to work you need all of the following
1) alloy (lightweight) engine
2) designed for high MCP (bearings, oiing)
3) DOHC (for VVT i&e)
4) Direct Injection (to avoid detonation with boost)
5) (Turbo)supercharger
6) Constant speed accessories (CVT accessory drive ?)
7) Fast computer (to respond to changes)

Europeans went to diesel because they did not need as much control for efficiency but gas (SI) engines can have much greater control of cyl pressures which means a broader torque band.

Personally find it much easier to tune an even-fire six than a four or eight, can develop steady flows both intake and exhaust but below about 2.5 liters there are other issues.

Towing needs torque and ability to cruise without going into power enrichment (PE). A certain 2.7 di/turbo spends too much time in PE and has complaints about low mpg.

Balance for the job is the key. Cyl deactivation still has friction losses.
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