MDS Delete SOLVED

Oh I’ll get right on that. I’m sure those videos must be right since someone on the internet posted them.

Bottom line: I don’t care if MDS damages my lifters. The crappy engine performance damages my manhood. I paid for 8 cylinders and I’m going to use all 8 cylinders. If I ever get lifter failure I’ll replace what breaks, but no point in replacing parts (cam, lifters, etc) that aren’t bad yet, especially since the non-MDS engines also have lifter failure.

Nuff said.

Wild one said:

Time for you to do some research,fuel milege has mothing to do with why the cam lobes are differant between the mds lifters and non-mds lifters,it's all in the way the slack in the lifter is taken up.
Cams for the MDS motors are unique because four of the intake lobes have a “primary ramp” that takes up the “locking lash” in the MDS lifter before the “secondary ramp” closes the check ball in the lifter, and the timing on the four MDS exhaust lobes was advanced by a few degrees.

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My comment was that FCA made some engines with MDS and some without, because they needed the fuel savings in their combined average. That’s a fact Jack.

I never said you could pick and chose what cam and lifter combo (although you can). I’m just saying there is no evidence that running a MDS truck with the MDS off all the time hurts anything.

Sure, you will find a video of some YouTuber that had engine failure after deleting MDS, but unless we know his driving habits, oil change intervals, and what he ate for dinner last night all of it means nothing. The internet is good for many many things, unfortunately masquerading false information as fact is one of them.

Bmags said:

My comment was that FCA made some engines with MDS and some without, because they needed the fuel savings in their combined average. That’s a fact Jack.

I never said you could pick and chose what cam and lifter combo (although you can). I’m just saying there is no evidence that running a non-MDS truck with the MDS off all the time hurts anything.

Sure, you will find a video of some YouTuber that had engine failure after deleting MDS, but unless we know his driving habits, oil change intervals, and what he ate for dinner last night all of it means nothing. The internet is good for many many things, unfortunately masquerading false information as fact is one of them.

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Sucks when you're wrong and have to back pedal and come up with some sort of excuse to cover your lack of knowledge,or even willing to admit that some you tube video's do have some merit,lol.
Watch the video's with your eyes and ears open,and you'll learn a bit more about the mds system,then you know now

What are you even talking about?!? Maybe go back and read this thread from the beginning. There is no back pedaling… good grief Charlie Brown

Bmags said:

What are you even talking about?!? Maybe go back and read this thread from the beginning. There is no back pedaling… good grief Charlie Brown

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You're the one who appears to be a bit stubborn about learning,not me there Linus
I guess you fall into the "can't teach an old dog new tricks" catagory
Watch the video's smart guy,and you'll understand more on how the mds system functions,and the benefits to keeping it,if you don't delete it properly

We can all agree that non MDS engines have lifter failures right?

We can all agree that MDS engines have lifter failures right?

So how does replacing the lifters and cam with non-MDS parts make it the right way vs disabling in software?

Oh, that’s right… it doesn’t.

Bmags said:

We can all agree that non MDS engines have lifter failures right?

We can all agree that MDS engines have lifter failures right?

So how does replacing the lifters and cam with non-MDS parts make it the right way vs disabling in software?

Oh, that’s right… it doesn’t.

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Apparently you still haven't watched the video's yet have you Linus
Maybe you should watch them,and expand your knowledge,as you're definitely lacking a bit on understanding how the mds system functions,and how it supplies oil to the lifters.
I can see you're to fast for wisdom,as it doesn't appear to be quick enough to catch up to you

I don’t plan on basing my decisions off the knowledge of some random guy on YouTube. If that’s your standard for factual information then good luck to you.

The facts remain that all Hemi engine types have lifter issues (ticks, etc).

I would argue most poor oiling is from excessive idling. My last ram had 300,000 miles on it and never made a peep. Maybe I’ll make a video tomorrow and post it for ya.

Wild one said:

Apparently you still haven't watched the video's yet have you Linus
Maybe you should watch them,and expand your knowledge,as you're definitely lacking a bit on understanding how the mds system functions,and how it supplies oil to the lifters.
I can see you're to fast for wisdom,as it doesn't appear to be quick enough to catch up to you

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If you can't explain it, but only point to someone else trying to explain it, then unfortunately you don't have much credibility. Also, is there a reason you don't add a space after your commas? Just curious...

Wild one said:

I don't think it's all that wise to disable the mds,unless you do it properly,and that's pull the MDS solenoids and replace them with the factory MDS block-off plugs,then swap lifters and cam to a non-mds set-up.

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Stop thinking like a guy who knows what he's talking about and start thinking like a goober...Come visit Florida if you need a goober tour.

Bmags said:

The facts remain that all Hemi engine types have lifter issues (ticks, etc).

I would argue most poor oiling is from excessive idling.

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I would argue that poor oiling is from poor engineering. The Hemi has oiling issues because it has an engineering issue that can only be corrected from a major design change. That costs a lot of money.

Wild one said:

It's generally not wise to run non-mds lifters on the mds lobes,will it work yes,but not ideally.In the real world,you should also swap the cam,if you're deleting the MDS

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Thats the point I was trying to make to Mr. Snarky. Some people just can't see the forest thru the trees.

mdc1990zr1 said:

Thats the point I was trying to make to Mr. Snarky. Some people just can't see the forest thru the trees.

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Who said anything about running a non-MDS lifter on the MDS lobes? People get fixated on the weirdest things…

I believe this post was started to say that disabling the MDS system by software only is fine. Some Wild Guy that needed to have his 5 minutes of fame said to replace all the hardware to delete properly (cam, lifters, etc) but also acknowledged that factory non-MDS engines also suffer from lifter failure.

So why on Earth would someone take out perfectly functioning hardware to replace with something else that is also likely to fail at some point?

My tires have 100 miles on them, better replace them since someone online has a video of a tire blowout at 1000 miles.

Well this got ugly.

Lifter failure aside, the MDS generates an unpleasant driving experience at low speeds. Little jerky and the drone is annoying. My guess is 60% of the regular readers here turn it off. This is a cool option when the right thumb is lazy. At $250 no thank you. I will continue fading the picture on my steering wheel from pressing every day.

Lsujker said:

Well this got ugly.

Lifter failure aside, the MDS generates an unpleasant driving experience at low speeds. Little jerky and the drone is annoying. My guess is 60% of the regular readers here turn it off. This is a cool option when the right thumb is lazy. At $250 no thank you. I will continue fading the picture on my steering wheel from pressing every day.

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The main issue I had with that option was that I didn’t like the shifting pattern in manual mode (it adjusts the shift points slightly in the tranny).

It was also annoying to leave my neighborhood and forget to turn it off and hear the exhaust blurping as a slowed down to the first stop sign.

I pressed it every day for 6 months, and I’ll tell you IMHO $250 is way worth it to just be able to hop in and drive.

Scottly said:

I would argue that poor oiling is from poor engineering. The Hemi has oiling issues because it has an engineering issue that can only be corrected from a major design change. That costs a lot of money.

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They could of redirected the piston squirters from the 6.2's /6.4's so they focused an oil spray onto the cam lobes , along with upping the idle rpm from the amenic 550 rpm the engines idle at , to roughly 725/750 rpm.
That would probably cure 99% of cam issues.
They could of done that when they originally re-designed the block for VVT , and also followed the engineers idea of using a billet cam , instead of a cast cam . A slightly stiffer valve spring wouldn't of hurt either , as it would mininiumize lifter bounce , which is another theory on why the lifters take to spalling the lobe face.
Those couple mods might of jacked the cost of an engine by a couple bucks at most , but the bean counters kept that from happening.
Just to keep my buddy happy , i used 2 spaces with the comas , as it appears like he can't read very well

Mr. Snarky brought up a good point. I’m going to hit the store today and get replacement bulbs and change mine out. Mine have 20k miles on them already, probably about ready to burn out soon.

Wild one said:

They could of redirected the piston squirters from the 6.2's /6.4's so they focused an oil spray onto the cam lobes , along with upping the idle rpm from the amenic 550 rpm the engines idle at , to roughly 725/750 rpm.
That would probably cure 99% of cam issues.
They could of done that when they originally re-designed the block for VVT , and also followed the engineers idea of using a billet cam , instead of a cast cam . A slightly stiffer valve spring wouldn't of hurt either , as it would mininiumize lifter bounce , which is another theory on why the lifters take to spalling the lobe face.
Those couple mods might of jacked the cost of an engine by a couple bucks at most , but the bean counters kept that from happening.
Just to keep my buddy happy , i used 2 spaces with the comas , as it appears like he can't read very well

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Never argue with an idiot… First they will drag you down to their level… then they will beat you with experience.

Your ability to get off topic continues to astound me. You’ve still never finished your thought on how replacing the MDS parts with non-MDS parts constitutes fixing this issue the right way (because you can’t). Instead you keep throwing out more and more issues with FCAs Hemi design. I guess they should hire you as a consultant.

I think MDS is useless unless you add up fuel savings over a half million trucks sold per year for 10 plus years then it makes a difference...... to the EPA.

As a consumer, I don't care for it, take every step possible to eliminate its use and generally undo any effects it has on my life.

My point, it's blamed for lots of issues with the hemi, and it's usually by the uninformed. The hemi was designed to be driven hard, back in the day when transmissions were 3 gears, rpms were high and fuel was cheap. Therefore oiling issues were not a favor, something else usually broke first before lack of oil caused a part to fail.

That's not the case today and adapting the old design through an update but not addressing engineering shortfalls was a short-term marketing solution.

If we could check, statistics would show, most consumers keep Their autos 3 to 4 years, trade when warranty expires and move on to a different product. To FCA or what ever their name is this week it's a numbers game and those numbers are stacked in their favor.

I accept if I keep my hemi over 75k miles the chance of having a major repair increases, that's why warranties end at 60 to 80k.

Rant over.

Bmags said:

The main issue I had with that option was that I didn’t like the shifting pattern in manual mode (it adjusts the shift points slightly in the tranny).

It was also annoying to leave my neighborhood and forget to turn it off and hear the exhaust blurping as a slowed down to the first stop sign.

I pressed it every day for 6 months, and I’ll tell you IMHO $250 is way worth it to just be able to hop in and drive.

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You really have no clue on how they turn off mds mode in the pcm do you , this is like your theory the Pulsar "blips" the throttle to disable mds .
I'm amazed at how uninformed you actually are
I'm out , as i learned along time ago , you can't fix stupid , and you sir are beyond fixing