Is this possible?
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Registered User
Joined: Mar 2014
Posts: 5
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From: Anchorage, AK
Is this possible?
Hey guys so we all know that 3rd gen HEMI's inhail fuel, but in the 4th gens have been programmed so that 4 cylinders would run on the highway. Can I program my 3rd gen to do that, or would I have to rip off parts from a 4th gen HEMI? Both gens have the same set up, but different wiring and chassis. What do you guys think: is it double, or not? If so, how much money would be put into it?
Last edited by Mathew572; Jul 9, 2014 at 11:45 PM.
Champion
Joined: Nov 2005
Posts: 2,875
Likes: 1
From: North Eastern England
It's called MDS and yes, it's in the heads.
However, a lot of people turn it off by using a programmer as it apparently doesn't save much if any fuel in the real world. As pushing a big azz truck down the road on 4 cylinders into a head wind etc etc etc.
It's better on the more aerodynamic cars and not on the bricks we run lol.
Just what I've read though.
Al.
However, a lot of people turn it off by using a programmer as it apparently doesn't save much if any fuel in the real world. As pushing a big azz truck down the road on 4 cylinders into a head wind etc etc etc.
It's better on the more aerodynamic cars and not on the bricks we run lol.
Just what I've read though.
Al.
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Registered User
Joined: Mar 2014
Posts: 5
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From: Anchorage, AK
Well that sucks... Getting 16-18 is getting more and more expensive up here in Alaska. I'm not all that worried if my bricks got only 4 lit pistons going 65 down the highway, as long as I can move, and save gas. Tell you the truth, you'd think you could tune the MDS to your liking. Have it kick in when your at 40, or something. Thanks for the info guys.
Amateur
Joined: Jan 2014
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I think you would have to do full conversion to get the MDS (i.e. ECM, etc).
I have the late 3 gen Hemi with MDS and I do know that the 4 gen Hemi is supposed to be a big improvement over the 3 gen.
But, I think the mpg improvements to 4th gen have more to do with the better gear box (8 speed) and moving certain elements that cause parasitic drag of the engine (i.e. electric power steering, electric radiator fan).
I have the late 3 gen Hemi with MDS and I do know that the 4 gen Hemi is supposed to be a big improvement over the 3 gen.
But, I think the mpg improvements to 4th gen have more to do with the better gear box (8 speed) and moving certain elements that cause parasitic drag of the engine (i.e. electric power steering, electric radiator fan).
Legend
Joined: May 2005
Posts: 8,662
Likes: 7
From: Central Oklahoma
Buy a more fuel efficient vehicle. Trucks are for hauling cargo and do a great job of it. If you're an air-hauler then that's the problems.
