While they aren't perfect, diyautotune has some decent ones here:
https://www.diyautotune.com/support/tech/install/ their carb to efi one is probably the best and they sell the exact kits they used. The vintage mopar one came in handy when I did mine, and the gen 3 hemi one. Even without perfect documentation, they are better then the ancient holley pro-jection systems I still run on my water pumps, those will be replaced this winter with MS systems though.

Yeah there is some good tech info in there, but a new user still has to do a ton of reading before they've accumulated enough to dive into the configuration stage. I especially liked the writeup on the 77 Nova where the guy did dyno before/after on a stock 350 carb, tbi, tbi w/ timing control and then port efi w/ timing control.

As I'm probably the most "Serious" race effort using an MS3Pro so I should probably chime in..

I've tuned and a still tune many BS3, Holley, FAST, Megasquirt, Stock GM, Ford and Dodge ECUs... Even import stuff like PowerFCs etc.. Having a chassis dyno everything comes across your lap. I used to run a Megasquirt 1 on my Dart almost 15 years ago but ditched it because of noise problems and went to a BS3 as I was tuning tons of them and still do, ended up selling the BS3 as a package with my old turbo setup so I needed a new ECU.

Big reason for not going with a Holley is they aren't really anything better than a FAST XFI, BS3 or an MS3Pro for the money. They are all a clump of very similar stuff that all accomplish the same thing in the end. If anything I think the new Big Stuff 3 Gen 4 coming out is going to set the bar a bit higher for off the shelf systems.


Reasons why I went MS3Pro-

They figured out the damn noise problems from original Megasquirt that drove me crazy..

CAN EGT interface is extremely affordable compared and is nice to trim cylinders cruising or WOT.

Outputs and inputs are easily setup and can use any sensor or algorithm to trigger things like water meth, intercooler pump or fuel pumps vs demand etc.

Easily use a new LSU 4.9 sensor and any existing wideband you may have.

Use Bluetooth and a basic android tablet as a dash customized exactly how you'd like it to show. (Like it better than the racepak I used to run)

Internal logging to SD card then Bluetooth download saves a ton of time plus you never have to remember to trigger it.

Megalogviewer and Tuner studio do most of the tuning for you once you've established your tables.

Things I don't like about MS3Pro-

Not every Joe Blow can just hook it up to their SBC, SBM etc.. and go. Takes some knowhow and wiring experience to do it.

Harder than almost every other ECU to make a base tune to start unless your buying a plug and play version of an MS3Pro.

Have to run an Injector driver box for low impedance injectors (Maybe an advantage as a separate piece..).

They don't make a Plug and Play harness like a BS3, Fast etc etc.. for a normal V8 (Might be coming sooner than expected which will solve pretty much everything I don't like about MS3Pro).


In the end the MS3Pro has more advanced features and the opportunity to develop features than any other stand alone ECU on the market.. but if you have no idea how to use them, the time to learn them or someone to help you, there is no advantage over any other standalone ECU besides price.

Nice thing on an MS3Pro which is like a lot of the other high end systems is cylinder trimming.. This was some we did cruising on drag week on the set of Moran billet Atomizer 2's.



Also some of the datalogged info from a run. I do like the way megalogviewer shows data.




Easy to tell not enough fuel pump and injectors at 100% duty cycle... Things to fix! Also RPM should have drop..

Man, I love those exh press ratios!

1.1-1.4:1 it seems.. as the boost goes up I'm sure it will get closer to 2:1. The Comp turbos have been working well for me and making steam.

The amount of data you can log with an MS3Pro is endless..

Logging driveshaft and doing traction control this time around and a few other goodies..

New converter, injectors, fuel pumps, transmission and some other misc things.. It will be a good year!

I have a FAST XFI 2.0, but have not installed it yet.
I think because they sell a PnP Dual-Sync dist for my 440, pre-made harness (although pricy) and the small ECU size was part of the decision.
I did not want to try adapting a crank trigger, or have to wire a harness, just wanted something to PnP to replace the Edelbrock XT EFI electronics.

I sell Holley, but on stock '09-up Gen3's I recommend the MS Gold. It IS plug and play, controls VVT, MDS, and the active intake. It also doesn't require a separate coil driver like the Holley or a VVT lock out. Again, let me state I'm a Holley dealer and love the stuff, but I can't sell $2500 worth of control that doesn't control the VVT, MDS, or AI (won't even get into the lack of trans control for NAG1). I can sell a $1400 MS Gold system that will, and then a $700 NAG1 controller, and have a customer with a '09-up Gen3 that can truly just swap a modern powertrain.

I didn't know about these, sounds really good. PM sent.