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GIII VVT Controller

70chall440

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So I am looking at options to control my 5.7 crate engine (2016-2021) which is a VVT engine. I really wanted to use the Holley Terminator X Max system but they all say "non VVT". I know Mopar sells their system for the crate engine but I really want to be able to tune it and I am familiar with the Holley systems since I have a HP system in my 70 Challenger.

So my question is what is everyone using and/or what are your thoughts on this? I sent an email to Holley and asked them so we will see what they say.
 
Change the cam and be rid of the VVT.
 
I would call Holley and ask. I'm pretty sure they are working on VVT control on their ecm's.
 
Change the cam and be rid of the VVT.

So, will changing the cam to a 392 non MDS cam delete the VVT? I have to say that the VVT and MDS stuff is a bit confusing. My engine is a non MDS, but it does have VVT. I bought a cam that is a non MDS (392) but I don't think this has anything to do with the VVT but I could be wrong.
 
Yes, changing the cam and lifters to non MDS and Non VVT will get you a regular engine. Also you’ll need the NON Lifter plugs on top of the cam tunnel.
 
Yes, changing the cam and lifters to non MDS and Non VVT will get you a regular engine. Also you’ll need the NON Lifter plugs on top of the cam tunnel.

Thanks, I am thinking that the cam I got is a VVT cam but I am going to have to do some research. I am not against the VVT but I need to control this engine and that is making this a bit difficult.
 
If it’s got a big ole’ circular dealeo on the snout, it’s VVT.
 
So I have a Mopar 392 cam PN 05037379BC which is a non MDS cam, however I cannot find anywhere that says whether it is a VVT cam or not but I suspect it is since I "think" all G3 Hemi's are VVT engines.
 
Here is a picture of it

IMG_2980.jpg
 
The 5.7 blocks with VVT have a bigger cam bore than earlier blocks. That is why they can have such a larger lobe. It’s possible that you can use that cam, get non mds lifters and “plugs” (on top of the cam tunnel) and use the Eagle heads. That should be just dandy. But don’t take this as Gospel, call Arrington, they’ll set ya straight.
 
The 5.7 blocks with VVT have a bigger cam bore than earlier blocks. That is why they can have such a larger lobe. It’s possible that you can use that cam, get non mds lifters and “plugs” (on top of the cam tunnel) and use the Eagle heads. That should be just dandy. But don’t take this as Gospel, call Arrington, they’ll set ya straight.

Thanks. I am under the impression that I only need springs on the head and that the stock lifters will work.
 
Not super sure as my 6.1 does not utilize the VVT system... but it shows the operation being the phaser (mechanical part attached to the camshaft) and the solenoid to control the oil flow to the phaser itself... the solenoid seems to be a two wire hook-up and thus is most likely a simple on/off system. In such an event - it wouldn't be hard for a universal stand-alone PCM to control such a piece... I know my MS3X could handle it so I would suspect that any of the "Big name" systems could do it... the import guys have been using systems to control VVT-i on 2JZ engines for a LONG time... this isn't much different.
 
Go watch engine masters, last episode of last season they control it with holley
 
Go watch engine masters, last episode of last season they control it with holley

Thats where I got the idea in the first place, I am going to have to watch it again.

Edit: I think I have to subscribe to MT to see that episode which I am not going to do, so I will have to keep reading...
 
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I discovered that Holley does offer a VVT control function, it requires a harness. So, I can run a Holley Terminator X Max controller with a VVT harness, so that fixes that.

Now, back to the cam. As I understand it the 6.4 non-MDS cam goes straight into a 5.7 (non-MDS) engine with the addition of new valve springs. I have seen a lot of information online on various forums but its all over the place. First off people are offering information that appears to be hearsay verses first hand knowledge. Secondly they seem to confuse MDS and VVT or use the 2 terms interchangeably and they are 2 different things. Lastly, people talk about changing lifters, pushrods, heads, etc. when the cam subject comes up.

What I am trying to figure out is whether I can just install the 392 (6.4) non-MDS cam into my 5.7 non-MDS engine without changing pushrods, lifters, etc.? I know I have to change the springs which I have but is there anyone out there that knows for certain what has to be done?
 
As long as the lifters that are in the 5.7 are NON MDS, your golden.
 
Per what guys on moparts have done, you're good. A guy on there, hotroddave, had done it by just shimming the springs. There are some old threads on there about it.
 
Thanks all, yes my lifters are non MDS, this crate engine is designed for a stick car as it comes with a clutch and flywheel, but is definitely non MDS
 
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