Talon101

Color me curious,
What happens in a hemi equipped jeep when your or straight away doing 60 kms with mds active,
then you floor it, how long does it take the engine to give you all 8 clys ?

missmyXJ

You dont even notice it. Its back to all 8 a lot faster than you can move the gas pedal. Its only noticeable when it activates at a steady cruise. Only reason for that is the exhaust note changes. You wont notice the cylinders coming back in. Its that fast. Its a really nice,simple system that uses solenoids to control oil flow to the lifters. Google it and have a read. Its interesting. SO far since it came out I have only fixed one for an issue and it was a bad solenoid. Thats a pretty impressive track record IMO.
Short of the idiot light and slight exhaust note you wouldnt even know it was equipped. Its seamless.

Talon101

Your not serious about the idiot oil light are you?
Thats way bad on a vehical thats that advanced.
Other wise it sounds pretty damn good.
I have to ask though , how much would you save on gas
in say a month of driving to work?

Any thoughts.

missmyXJ

Not an oil light...it has a economy light that comes on when the mds is active. Thats the idiot light I was referring to.

I've seen the new Hemis up around 18 mpg. Thats a lot compared to the 10-12 they got prior to about 2009.

As far as I have been told by Chrysler its about 2-4mpg in the real world with average driving on the 2010 and up. The earlier Hemis its only about 1 mpg if your lucky. Its not all the MDS on the newer ones though. Its a package thing. Other engine mods were also done. Valve timing etc.
Doesnt sound like much but in the car world its massive. Even 1 mpg is huge. 1 mpg for every Hemi truck sold. The amount of fuel saved is monstrous.
Take my 4.7 durango for instance. I just finished a little experiment last week. With my tires at 30 psi I averaged 15.1 mpg. Same trip,same conditions ran 4 times about 240 km. With a change in tire pressure to 38 my average went up to 17.6 Thats 2.5 mpg. Do the math. Thats around 100 klm per tank of fuel gain. Thats an extra trip and a half to work for me on the HWY which is the route I tested on. Of course this isnt dead accurate science kind of stuff but its an example of how much a couple of MPG can save you. It works out to around 64 dollars a month in fuel savings for me to gain 2.5 mpg.

Talon101

I realize this reply is many months old but i would say, you should not have one engine for all vehicals that you make. Thats crazy, a friend told me that the v6 jeep vs the v8 jeep (the v8 is the better option) because it doesn't have to work as hard to pull the jeep. This is assuming normal driving. It burned the same amount of gas for daily driving but if you need it, you have V8 power available.
It makes sense , a powerplant should be made to move the vehicle with ease. If the engine has trouble then its probably not strong enough to do the job.
My thoughts