EFI, EZ-Lynk, MM3: What is the Best Tuner for my Ram 6.7L Cummins

What’s The Best Tuner for My 6.7L Cummins?

If you’re in the market for a tuner for your 6.7L Cummins - it won’t come as a surprise to you that there are countless different options available for the 6.7L Dodge. We decided to try and offer some information to try to help you decide what’s right for you.

If you’re in the market for a tuner for your 6.7L Cummins - it won’t come as a surprise to you that there are countless different options available for the 6.7L. We decided to try and offer some information to try to help you decide what’s right for you, and why we use what we use at the shop. 

What's the Difference?

At their core, most of the tuners on the market are essentially the same, the tuner rewrites your ECM to run at different parameters while driving. You can either purchase a box tuner that is preloaded with multiple tuning files (aka Canned Tune), or custom tune files. Every company that produces these tunes is competing to achieve the same thing: Maximum Power, Fuel Mileage, and Drivability. I’m by no means a professional tuner, however, I understand the basics. Typically, to achieve these results, each tuner will adjust the fuel timing, boost levels, and the amount of fuel injection.

This isn’t something they take lightly either - there is a ton of research, development, and testing that every tuning company will spend countless hours perfecting before the tune ever reaches the public market. Even after the tune is perfected and available for purchase there will be constant updates, tweaks, and changes to the tune as technology changes and glitches and bugs are found. As of the last few years, most companies are shooting for smoke-free high-efficiency horsepower without blowing everyone’s engines and transmissions to pieces. 

 

EZ-Lynk Auto Agent

 


The four big tuners we use at the shop are EZ-Lynk, MM3, EFI Live, and HP Tuners. Each one comes empty and requires you to pair it with a custom tuning company of your choice, we use these because they tend to be much more refined than a canned tune package that comes with a generic tune off the shelf. You’ll find custom tuning offers better driveability, more efficient power, and endless adjustability for when you decide to upgrade your turbo, install bigger injectors or get a built transmission. 

 

BD Diesel Turbo Upgrade 6.7L Cummins

A Bigger Turbo is Always a Good Idea.

Data Logging - Diagnosis Made Easy.

A crucial, and often overlooked aspect of tuning with an EZ-Lynk, HP Tuners, EFI-Live, or MM3 for your 6.7L Cummins is that it unlocks a wealth of data through data-logging. If you notice your Ram is acting weird under certain conditions, you can use any one of the tuners to data-log your truck, essentially pulling the raw data of what your truck is doing and sending that to your custom tuner. They can view your data and see what the truck is doing and send you tune adjustments, or accurately recommend the next steps you should take to solve these issues. Whether it's a tweak in the tuning, or a recommendation for new parts, they will be able to point you in the right direction. If you've ever had sporadic issues with your truck, then you'll understand how much of a life saver this can be. 

Will it work on Multiple Trucks? 

The EFI-Live, HP Tuners, MM3, and EZ-Lynk all come with the ability to tune multiple trucks off of one device. The tunes themselves will be locked to your VIN, but the tuner can be used to tune your new truck, your friends truck, or anyone elses. You'll just need new tune files, and a VIN Licence (included in most tune packs). That way if you sell your truck and keep the device, you can use it to tune your new truck and save some cash on the next round of tuning.

 

EFI Live Autocal V3

EFI Live is a fantastic custom tuning platform, however, the Autocal or Flashscan device that you use to load it into the truck with does not give you any type of display to monitor your truck with. It simply allows you to take a stock truck and flash the ECM with new tune files, it’s a great option for those that are just looking for a delete tune, tow tune, or a few different power options to increase the drivability. EFI Live can be combined with a switch to offer 5 different power levels for the 2008-2012 Cummins and 4 power levels for the 13-21+ Cummins. We use EFI Live every day in-house as it’s a very affordable way for us to flash a customers truck with top of the line custom tuning.

EFI-Live Highlights:

Best on a Budget

The EFI-Live generally comes in at the lowest price point on the market, if you're looking for a quick tune, and you're not interested in all the bells and whistles, the EFI-Live may be for you.

Data-Logging

The AutoCal gives you some of the most powerful data-logging on the market. Allowing you to diagnose your truck with your tuner much easier.

EFI-Live Pitfalls:

No Display

If you're looking to monitor your EGT's, Boost, or anything else, you'll need an additional monitor or another tuner. The EFI-Live has no built-in monitor, however, you always have the option of adding a CTS3 to monitor your truck.

Manual Updates

New Tunes & Updates must be downloaded via email, then loaded onto your Autocal, then flashed into your truck via OBDII. This can be more time consuming than other tuners. 

HP Tuners MPVI3

The HP Tuners MPVI Device is another great option that allows you to flash custom tuning onto your 6.7L. When compared to the EFI Live Autocal, these devices share many similar features such as the ability to read and write ECU (Engine Control Unit) and TCM (Transmission Control Module) data. Like the autocal, this device does not have a display, so it really boils down to preference on which device to purchase.  

MPVI Highlights:

Competitive Pricing

Like the EFI Live Autocal, the MPVI3 is competitively priced to be the lowest price point on the market. This makes it a great option if you aren't wanting anything fancy and are looking for a tune.

TCM tuning On Early 68RFE (2007.5-2009)

A huge benefit that the MPVI3 device offers over others is the ability to apply transmission tuning on the early 68RFEs (2007.5-2009). Click here.

MPVI3 Pitfalls:

Laptop Required

You must have a laptop in order to be able to apply this custom tuning. Unlike the EFI Live Autocal that can come preloaded, you will require a laptop in order to be able to upload the tuning onto your truck. 

Stock Read

In order for us have the tunes written, you must first send us a Stock Read File. This file provides the information required for the custom tuning file. 

No Display

If you're looking to monitor your EGT's, Boost, or anything else, you'll need an additional monitor or another tuner. The EFI-Live has no built-in monitor, however, you always have the option of adding a CTS3 to monitor your truck.