Hello. Thanks for the info... I do have a quick question about the MDS lifters. I understand they have holes on the side and the push pins align with the holes.. looking at some of my lifters old and brand new, someof the pins are nit directly loned up with the holes...would that be correct? So as they rotate around inside the cynlinder?
It would depend on the application. If someone were to perform a performance cam swap I would definitely say remove the MDS system. However if you were to keep the standard camshaft I would imagine the benefits of the MDS system fuel saving is more important to the operator. I would like to do a little more research and show how the solenoids and oil system in the MDS operates, if that's something people would be interested in.
Do the pins actually need to align with the holes? Ordered new mds lifters and only 2 of the 8 align..or do the pins just need to catch along the ridge on the inside of the lifter
Does it make sense that if lubrication is a issue for the hemis that letting mds happen more often will lube things more often? I hear when mds comes on there's more lube on the cam and lifters. Is this true
The system seems to supply oil to the lifters to activate the cylinder deactivation. If the mds activates more often then it will allow more oil to the cam and lifters. I think the problem is the lack of oil pressure at idle as well which would be why the hellcat high volume oil pump is a good upgrade. I've done the same thing in an ls application and it raised the oil pressure at idol significantly.
@@martinheredia6124 When operating in Tow/Haul mode, the MDS solenoids do not send high pressure oil to activate the pins in the MDS lifters, but the MDS lifters still receive oil and still function like a non-MDS lifter. It's still getting oil from the push rod. The push rod gets oil from the rocker arm and shaft assembly, which is pressurized by oil where the 2nd and 4th bolts for the rocker assembly are located. When the engine switches to MDS, the MDS solenoids activate and send high pressure oil to the MDS lifters which then deactivate the pins allowing the lifter to ride with its internal spring set. This spring set has far less compression than the valve springs, therefore the push rod does not compress the valve spring and open the valve. But good question though.
I was told by a seller that I could use their MDS lifters in my NON-MDS engine. However; now that I've done that the engine runs like it has a constant misfire. Can anyone confirm that the misfire is due to installing MDS lifters in my NON-MDS 5.7L engine?
Just so everyone knows. The misfire is DUE to putting MDS lifters in a NON MDS engine. Do not attempt to do this no matter what the parts seller tries to sell you. There was a puddle of gas in the intake channel proving the MDS lifters didn't open the valves in my non-mds engine.
Great info. Sad to see your effort is rewarded with a few views when a cat chssing feather hit a million in half the time. What a world.
Hello. Thanks for the info...
I do have a quick question about the MDS lifters.
I understand they have holes on the side and the push pins align with the holes.. looking at some of my lifters old and brand new, someof the pins are nit directly loned up with the holes...would that be correct? So as they rotate around inside the cynlinder?
Good guide 🎉
Nicely explained. Thanks for the help.
Do you ever clean them and reinstall them
Thanks I get it now. I was wondering how the system actually worked. 👍😎✌
Great video explaining the difference. If someone did an MDS delete to their mds vehicle would you recommend the nonMDS lifter or the mds lifter?
It would depend on the application. If someone were to perform a performance cam swap I would definitely say remove the MDS system. However if you were to keep the standard camshaft I would imagine the benefits of the MDS system fuel saving is more important to the operator. I would like to do a little more research and show how the solenoids and oil system in the MDS operates, if that's something people would be interested in.
I should clarify and state if you wanted to delete the MDS system you would have to remove the MDS lifters when removing the MDS solenoids
Do the pins actually need to align with the holes? Ordered new mds lifters and only 2 of the 8 align..or do the pins just need to catch along the ridge on the inside of the lifter
Does it make sense that if lubrication is a issue for the hemis that letting mds happen more often will lube things more often? I hear when mds comes on there's more lube on the cam and lifters. Is this true
The system seems to supply oil to the lifters to activate the cylinder deactivation. If the mds activates more often then it will allow more oil to the cam and lifters. I think the problem is the lack of oil pressure at idle as well which would be why the hellcat high volume oil pump is a good upgrade. I've done the same thing in an ls application and it raised the oil pressure at idol significantly.
So if the mds is disabled shifting manually or using tow/haul mode, lifters are running dry?
@@martinheredia6124 When operating in Tow/Haul mode, the MDS solenoids do not send high pressure oil to activate the pins in the MDS lifters, but the MDS lifters still receive oil and still function like a non-MDS lifter. It's still getting oil from the push rod. The push rod gets oil from the rocker arm and shaft assembly, which is pressurized by oil where the 2nd and 4th bolts for the rocker assembly are located. When the engine switches to MDS, the MDS solenoids activate and send high pressure oil to the MDS lifters which then deactivate the pins allowing the lifter to ride with its internal spring set. This spring set has far less compression than the valve springs, therefore the push rod does not compress the valve spring and open the valve. But good question though.
I was told by a seller that I could use their MDS lifters in my NON-MDS engine. However; now that I've done that the engine runs like it has a constant misfire. Can anyone confirm that the misfire is due to installing MDS lifters in my NON-MDS 5.7L engine?
Just so everyone knows. The misfire is DUE to putting MDS lifters in a NON MDS engine. Do not attempt to do this no matter what the parts seller tries to sell you. There was a puddle of gas in the intake channel proving the MDS lifters didn't open the valves in my non-mds engine.