Pulsar 2023 Ram 2500 Power wagon

[Ynottirbo]

I just purchased the Pulsar for my 23 Power Wagon. It does not have the feature for the TPMS adjustment for lower pressure in my new 35’s. My friend has the AlphaOBD and can adjust for me. Would I be wise to have him adjust the TPMS prior to installing pulsar. I got the Pulsar to turn off annoying MDS and better throttle control. know the AlphaOBD will do the adjustments, but not sure if it can shut off MDS. Any advise is appreciated.

 

[Wild one]

I just purchased the Pulsar for my 23 Power Wagon. It does not have the feature for the TPMS adjustment for lower pressure in my new 35’s. My friend has the AlphaOBD and can adjust for me. Would I be wise to have him adjust the TPMS prior to installing pulsar. I got the Pulsar to turn off annoying MDS and better throttle control. know the AlphaOBD will do the adjustments, but not sure if it can shut off MDS. Any advise is appreciated.

You might want to read through this thread a bit,and watch the 16 minute video,before you turn off the mds.

For the guys who think deactivating the mds via a tune is a good idea

=AZXcfuqWYbC_PPIfMwz6Tct1NEi-bxooGBgMOJPipiKmkHcPaPHf6yt_L9edGk5pG-I_jnWJ2GWbIJCihKx86jt6riMu1aUpLlDdjK5dRqjxnZDD9moF3DUfyJVgtPgrtspfQGHN97CXnaEwevkNEv2wjK3rrSfIu9kGULTQIRFCIvdTcKD1cMBV8O5LXTixPZFei1XGVk-smlITIajlOy3sfqNDkf92cz5hXnR1G4grpHEtcZudtXX1cThisKciZyTgKxZd77OqIYPyelhXwQid&__tn__=-UC%2CP-...

www.ramforum.com

Spend 16 minutes and watch this video to.

Is MDS Damaging Your HEMI? The Answer May Surprise You!

I feel like MDS has been unfairly made the culprit for the lifter failures we see on Gen 3 Hemi engines. In this video I explain exactly how the system works...

www.youtube.com

 

[Ynottirbo]

Thank you. I had a 2020 Chevy Trail Boss, and used the Pulsar to deactivate the Dynamic Fuel Management, which is the same as the MDS for Ram. It was the best. No eco mode. Not doing it due to the lifter issues, doing it because I notice a different in the truck when it goes into eco. Hate it. I want 8 cylinders all the time. That's why I purchased a V8. I will check it out knowing you took the time to reply. Thank you.

 

[Wild one]

Thank you. I had a 2020 Chevy Trail Boss, and used the Pulsar to deactivate the Dynamic Fuel Management, which is the same as the MDS for Ram. It was the best. No eco mode. Not doing it due to the lifter issues, doing it because I notice a different in the truck when it goes into eco. Hate it. I want 8 cylinders all the time. That's why I purchased a V8. I will check it out knowing you took the time to reply. Thank you.

When you disable the mds in a Hemi,it cuts oil flow to the lifters

 

[gt8684]

Ok, I watched the video, read the article, please tell me what I missed. Is there a difference between using the "gear select" or "tow mode" or a seperate computer to disable the MDS system? I wouldn't think there would be? In the article it mentioned that at idle there is "NO OIL" to the lifter. And here you mention when you disable the MDS system is cuts oil flow to the lifters? If you are sitting at idle, MDS is already disabled as it doesn't opperate at idle. Some of this does not work, if this was the case, what happens you get caught in traffic for 30 minutes on a hot day? You would have lifters seizing up. Then the next part where disabling MDS cuts oil flow to the lifters, maybe someone bought a truck to drive around thier teacup poodle and MDS can be on all the time, but if you hook up a trailer then enable tow haul mode and pull a 6-7-8k trailer, when the engine is working harder, needing the extra cooling and lubrication from oil, they are going to cut it off? I get that the engine is spinning at a higher RPM at this point, but this concept that we are going to oil the lifters from oil sling off of the crankshaft, just doesn't seem well thought out. And if the answer is that during driving there is enough oil pressure to push past the MDS system to keep everything lubed then again how would having it disabled be the cause of lifter/cam failure? Certanly open to learn whatever I missed.

 

[Tulecreeper]

It's automatic for me to disable MDS with the ERS +/- as soon as I put it in gear because as some have said, I bought a V8 because I wanted 8 cylinders not 4. However, lately when not towing I have tried to get into the habit, at least some of the time, of letting the MDS do its thing when I get up to 45+ MPH and will be staying there for a couple miles. I figure it can't hurt anything, it will help keep it "lubed up" so to speak, and my mileage is a little better. Driving in town I always keep MDS disabled. It's an experiment in progress.

 

[Wild one]

Ok, I watched the video, read the article, please tell me what I missed. Is there a difference between using the "gear select" or "tow mode" or a seperate computer to disable the MDS system? I wouldn't think there would be? In the article it mentioned that at idle there is "NO OIL" to the lifter. And here you mention when you disable the MDS system is cuts oil flow to the lifters? If you are sitting at idle, MDS is already disabled as it doesn't opperate at idle. Some of this does not work, if this was the case, what happens you get caught in traffic for 30 minutes on a hot day? You would have lifters seizing up. Then the next part where disabling MDS cuts oil flow to the lifters, maybe someone bought a truck to drive around thier teacup poodle and MDS can be on all the time, but if you hook up a trailer then enable tow haul mode and pull a 6-7-8k trailer, when the engine is working harder, needing the extra cooling and lubrication from oil, they are going to cut it off? I get that the engine is spinning at a higher RPM at this point, but this concept that we are going to oil the lifters from oil sling off of the crankshaft, just doesn't seem well thought out. And if the answer is that during driving there is enough oil pressure to push past the MDS system to keep everything lubed then again how would having it disabled be the cause of lifter/cam failure? Certanly open to learn whatever I missed.

I'm not going through explaining it all over again,as your questions were all asked in the thread,and answered there I honestly could care less whether you run it or not,that's your call,all i attempted to do was inform guys about the disadvantages with disabling the mds via tune / buttons etc.
It's your truck,run it however you want

 

[Ynottirbo]

When you disable the mds in a Hemi,it cuts oil flow to the lifters

So explain how tow mode and manually shifting up does not cause oil flow cutoff...

 

[Wild one]

So explain how tow mode and manually shifting up does not cause oil flow cutoff...

Read the thread,you aren't asking any questions,that weren't already asked a dozen times already. I'm not going through this argument again. Like i told you,it's your truck,if you don't want to listen to MMX or Reignited i could care less.I'm not making your payments,you are,do what you want. But at least you've been informed that disabling mds like you want to do,might not be the best way to operate your truck.Now go read the thread so you can come up with an original question.

 

[Ynottirbo]

Read the thread,you aren't asking any questions,that weren't already asked a dozen times already. I'm not going through this argument again. Like i told you,it's your truck,if you don't want to listen to MMX or Reignited i could care less.I'm not making your payments,you are,do what you want. But at least you've been informed that disabling mds like you want to do,might not be the best way to operate your truck.Now go read the thread so you can come up with an original question.

Thank you for your **** poor insight. You drive your truck how you want, I will also do the same.

 

[gt8684]

Lol, this is borderline laughable. @Wild one I read through 100 posts. I'm not going any further, a few people make jokes, a few people pat you on the back. But no one proves the point you tried to make originally about disabling MDS causing lifters to not get oil or limited oil, in that post or on this one. I mean @mikeru did some homework and literally contradicted everything you mention. Even on post #93 from you, the first line is literally that many people have disabled via buttons or tune with no problems. But here you are still saying the sky is falling... And to the video, the guy even said he has had to replace failed cams on motors with manual transmissions which came factory with the block off plugs for the actuators. So again no evidence that motors with MDS disabled in any form causes the lifters to get "no oil" or "cuts oil flow to the lifters"

First, I would like to start off by saying, there is a large quantity of misinformation and BS on the internet regarding the Gen 3 Hemi’ s lifter issues.

The only thing I can agree with is, it's your truck drive it how you want.

 

[Wild one]

Lol, this is borderline laughable. @Wild one I read through 100 posts. I'm not going any further, a few people make jokes, a few people pat you on the back. But no one proves the point you tried to make originally about disabling MDS causing lifters to not get oil or limited oil, in that post or on this one. I mean @mikeru did some homework and literally contradicted everything you mention. Even on post #93 from you, the first line is literally that many people have disabled via buttons or tune with no problems. But here you are still saying the sky is falling... And to the video, the guy even said he has had to replace failed cams on motors with manual transmissions which came factory with the block off plugs for the actuators. So again no evidence that motors with MDS disabled in any form causes the lifters to get "no oil" or "cuts oil flow to the lifters"


The only thing I can agree with is, it's your truck drive it how you want.

What's laughable is you thinking cutting oil flow to the lifters is doing the cam and lifters any good.The cams are marginal at best in the hemi,so why you think cutting oil flow is going to make them last any longer,is the laughable part.I've spent enough time around engines over the last 60+ years,to know lack of oil is the worst thing you can do to a rotating part,that has a part that slides up and down in a bore applying pressure to said rotating part. Little tidbit for you pair,the only pressurized oil that might make it to the cam lobe is what drips off the sides of the lifter bore,otherwise there is no pressurized oil fed to the cam lobes.Have a good day gentlemen,i'm not rehashing this all over again.

 

[gt8684]

And yet you still have not given any "PROOF" that it cuts oil flow to the lifters.

 

[Units]

 

[Wild one]

And yet you still have not given any "PROOF" that it cuts oil flow to the lifters.

You really aren't grasping how the MDS system works are you It takes pressurized oil to push the pins in that unlocks the lifters piston,basically letting the lifter collapse,which puts the engine in mds mode.I'm not sure what you think the mds solenoids do,but you aren't grasping how they function are you

 

[CanuckRam1313]

Thank you for your **** poor insight. You drive your truck how you want, I will also do the same.

Bud, with all due respect, I get your questions (I had them recently, too).

However, @Wild one is just encouraging you to read every single post in the entire thread and you'll be 100% read in on all you're asking clarifications on, I promise you.

Now that I'm more educated on the prowess of exactly how our MDS system operates. That if one isn't going to spend the money to have a proper MMX or FRP MDS delete cam and associated parts installed and then have it all tuned with the HP Tuner goodies, vs simply manually turning off ones MDS by selecting the gears to go into 8, or using tow/haul mode, then beware that there is oil starvation that occurs.

This said, I was staunchly anti-MDS, "was"!
I still don't prefer how my truck operates when in low load/low speed scenarios with MDS on (i.e. traffic and/or in-town driving).
However, I now always have my MDS on when I'm on the highway and or in-town and on a continual move, and turn it off when I'm not.

It is the great members here who have poured their wisdom and experience out to us all that makes this an incredible forum.

So, please try not to get upset at anyone. And, when it's recommended to you to thoroughly read an entire thread on the very subject you have questions on, I'd strongly recommend you get a beer, some popcorn, and enjoy the endless hours of education (and fun) that is Ram Forum

 

[CanuckRam1313]

And yet you still have not given any "PROOF" that it cuts oil flow to the lifters.

Please refer to my post, #16

 

[gt8684]

Yes wildone I am aware of how the solenoids operate and use oil pressure to depress the pin to keep the lifters from working and deactivate the valves.. You state that with MDS deactivated, those corresponding lifters are getting "No oil" or "Low oil" flow. Then if that was the case those lifters would fail, no question. It would not be possible for those lifters to be lubed enough just by the occasional MDS engagement. 10 hours towing a trailer and you would be buying a new motor. Also if all of this was accurate, then why is it that the other NON MDS lifters/cam lobes also fail? Also they fail on manual transmission cars that have the 'factory block off plates' with appropriate lifters.

Canuck, I'm not mad, I ask what are simple questions, and am just getting a run around circle of bs.... Yup, it's just bad because I said it's bad. Since everyone wants to share reading material, this may help a little. FYI it's mostly pictures so maybe wildone will understand.

https://www.ramforum.com/threads/hemi-valvetrain-oil-flow-path.114894/

 

[ramffml]

It's a matter of perspective: is it truly "cutting" oil to the lifters when NOT using MDS, or, is it adding oil to the lifters as a by product of forcing the MDS system to activate?

That is the question.

No doubt there is somewhat less oil getting to the lifters with MDS disabled, but the second question is, "does it matter".

I appreciate @Wild one 's posts on all this, doesn't hurt to have more discussion. As of now though, IMHO it doesn't harm the engine to run with MDS disabled permanently as I have done for about 60,000 miles now since new, while towing a fair amount as well.

I guess time will tell!

 

[Wild one]

Yes wildone I am aware of how the solenoids operate and use oil pressure to depress the pin to keep the lifters from working and deactivate the valves.. You state that with MDS deactivated, those corresponding lifters are getting "No oil" or "Low oil" flow. Then if that was the case those lifters would fail, no question. It would not be possible for those lifters to be lubed enough just by the occasional MDS engagement. 10 hours towing a trailer and you would be buying a new motor. Also if all of this was accurate, then why is it that the other NON MDS lifters/cam lobes also fail? Also they fail on manual transmission cars that have the 'factory block off plates' with appropriate lifters.

Canuck, I'm not mad, I ask what are simple questions, and am just getting a run around circle of bs.... Yup, it's just bad because I said it's bad. Since everyone wants to share reading material, this may help a little. FYI it's mostly pictures so maybe wildone will understand.

https://www.ramforum.com/threads/hemi-valvetrain-oil-flow-path.114894/

You appear to never had a head gasket in your hands have you,lol. If so you'd realize how little oil flows to the top end of the engine,and then feeds everything ,plus also sprays a cooling jet of oil on the valve springs,long before the left over oil gets down to the pushrod cup in the lifter itself.Seeing as how you're all about pictures,look close at the head gasket hole. Picture boy,you might want to look at post #3,"closely"
The percentage of manual trans Challengers and Hellcats that have cam/lifter issues is far less then the percentage of auto/MDS hemi's that have issues.Whens the last time you seen a Hellcat with a bad cam,they're few and far between.
That all leads back to poor quality cam cores / weak valve springs and poor oil flow to the cam and lifters.
BTW when you're towing the engine is also usually seeing higher rpm,so the little crank splash that makes it to the cam lobe and lifter is increased significantly.
I give up,you guys appear to know more MMX and Reignited Cycle,even though you've never been inside a hemi.
I'll stick with thinking they know more about the hemi,then some internet guru who's never even had a set of heads off a Hemi,but knows everything