If I need to change my cam at this point, I'll upgrade to a 392 cam, springs, and pushrods. I've seen multiple places where people saying non mds lifters work fine with stock mds cam
, even a few of my chrysler master tech friends. So barring damage to the cam I want to think its not the cam. I've also unplugged mds solenoids and turned mds off in diablo.
I'll put it bluntly (don't take it personal), when people start mentioning having friends as Chrysler Master Techs when they refute advice given on the subject. If they were as insightful and knew everything as implied with the word "master" in their titles then people wouldn't be here asking us general un-educated folks for help.
Just so you understand, I listened to several "master techs" and people and did the same thing. I got a P0300 misfires, a funky exhaust note, valve train noise, and a car that just didn't run right. I was told elevating idle would also solve it. It did not. This situation cost me alot of money and work so I am little jaded with it.
After researching difference in the cams, I learned that the MDS cam has different ramp and lobe profiles due to the check valve design of the mds lifter, as well as the advanced timing of the exhaust lobes on four of the cylinders. Physically the cam is different. Just like the lifters. Where as it may "work" it is not done right. Yeah you can put substitute broccoli in a receipe where its calling for bacon. And it still be edible. Does not mean it's going to be right tho.
I swapped out to a Challenger 6 sp cam, P/N #53022064BD ($80 bucks on rockauto) and my P0300, exhaust note, excessive valve train noise all went away and the engine felt more, how you would say "right".
Now, am I 100% sure this is the issue no. I can never be. However from personal experience I give you the advice based on what happen to me. I always suggest you research it yourself, read countless threads, and find out what you need.
Also note, 91 octane tune will serve you better in long run running 93 octane. Several posts and dynos on Challenger forums showed more power continuously from not having spark knock. Also, difference in power is less than 5hp generally, specially on canned tune. A lot of the canned Tunes work in giving you power is the throttle booster in making you feel faster. Same as a pedal commander.
