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You can leave the harness in place if you want.On my truck we removed the harness though,and it's never caused me any issues.I think as long as you delete it in your tune,you'll never have any issues with removing the harness
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It's my understanding all the lifters use the same bearings whether they're mds or non-mds lifters. Personally i think the angle of the lifters in relation to the cam,is one of the big downfalls to the 09 and later Hemi's. Tom Hoover designed a valve train that's good to 8,000+ rpm,but he didn't do the average owner any real favours by doing that. Moving the cam even farther from the crank and sticking a VVT oil passage under it,wasn't the best idea in my opinion,with-out addressing the cams oiling issues. He should of designed an oil squirter similiar to the squirters that would spray a small stream of oil onto the cam lobes.He could of designed the block to have the VVT passage above the cam,and kept the cam closer to the crank,but that would also comprise the valve train geometery,to some extent,but on a stock engine that is only going to 5600 rpm at it's WOT shift point,would it have actually caused the averafe owner any issue,i kind of learn towards probably not. The other issue was the fact he spec'd a billet cam,but the bean counters killed that idea. With a good quality billet cam,and better valve springs,i would lay odds alot of the cam issues wouldn't be an issue,the after market has kind of proven that fact.
Maybe 5 hours total getting intake off & solenoids out & plugged.Gearheads dont need to justify anything, Send it
Takes 5 minutes to open up the loom and cut all that **** off
That wear idea has never really been an issue,and is more an internet myth then anything. You'd see differant rod bearing and cylinder wall wear on tear down of a high milege engine,and nobody has ever found a differance in bearing or cylinder wall wear between the mds and non-mds cylinders on a high milege engine that's ran mds all it's life.
That's where you find a young guy and offer up beer to do the job,while you supervise,lol. Pulling the intake isn't really all that big of job in my opinion,but then again i've had several on and off,so it's nothing that bothers or scares me to do.
Supposedly they changed in the 17 model year,my understanding is the 16's still used the older style,but the 17's had the revised versions,but it's something i've only heard through the rumour mill,never been able to prove it
Watch Reignited's video,it explains it even better then MMX's article does Mike. Common sense would tell you,that shutting off oil flow to the lifter bores isn't doing the lifters any good.The little bit of oil that does make it past the lifter and it's bore,and hopefully onto the cam lobe is going to be diminished.Remember the engine is only designed to run long enough to make it past the warrenty,after that the manufacture doesn't really care about the consumer.You'll also notice they used to have 100,000 mile warrenty,now its down to a 60,000 mile warrenty on the trucks.So instead of fixing known issues,they decided to drop the warrenty milege,and pass the buck onto the consumer. I have no skin in this game,all i'm trying to do is point out the obvious to alot of guys who'd never considered how the mds affects the oil flow path inside the hemi. My truck has been properly deleted,but my 2 cars that still have their original cams/lifters,still employ mds,and i could easily deactivate it on on both if i wanted,but that's not going to happen as long as i own them,or they still have their stock cams. I don't leave it activated for milege,i leave it activated for oil flow to the outside of the lifter,as lifter bore scoring is not something i'm interested in dealing with,and the fact there is going to be more flow past the lifter is not a bad thing.I also don't subscribe to the theory mds causes more wear on the engine,as that ones a myth and nobody has ever proven there's any more wear on the cylinders or bearings with or with-out mds. If you prefer to defeat mds everytime you drive the truck,that's your call,but at least you'll have learned a bit more about how the oil path operates in a Hemi
).The whole purpose of this thread is to educate guys more then anything.I've been against defeating mds for a few years,but i usually get more static then anything. Hopefully when outfits like MMX and Re-ignited point out the downfalls,more guys will think about whether they want to defeat it everytime they drive their Hemi's.There ya go...just F_- N... my whole preach from the pulpit as I swing the good book of 'screw the lag and bog' proclaiming the benefits of disabling MDS from the gear selector....
I have blasphemed so much I feel h-_e.l.. L fire's warm embrace
I shant anymore!
But seriously... I absolutely don't disagree with the actual metrics provided...truth be told!
However, for the life of me, I cannot stand the way the vehicle feels whatsoever when MDS is on. The lag and bog is unnerving to say the least, especially when I have my summer 35's on.
The way my truck reacts, especially when driving in traffic and low speed/low load situations, and then stepping on it from a slow speed as it try's to find itself the right cylinders and transmission gears to react accordingly.... UGH!!!!!!!!!
As for any semblance of fuel economic benefits; calling nonsense on it because I have done the on-road tests myself and there is no fuel savings to be had (at least not for me
Perhaps I was very fortunate with my then new 19' as I retired it at five years old and 160,000KM's and virtually never, ever ran it with MDS, and it was smooth as silk at all times.
Albeit, I was not one to really ever idle it, say for brief winter starts to get things circulating, and I used high end synthetic oil and filters, and top tier premium fuel as well. Did that contribute to its longevity and lack of tick; perhaps, or not at all, who knows?!
Maybe I just do what I've always done, and if the engine has an issue... well.... I now have a factory warranty for 90,000+KM's, so, they can replace it if it breaks
Regardless, @Wild one - your due diligence, experience, and willingness to help others, as always, is truly appreciated!
so, disabling it at the steering wheel does more harm than good?
Spend about 16 minutes watching Reigniteds video,it explains it pretty well,and you can draw your own conclusions from it.
www.youtube.com
