MS3PRO EVO on 4th Gen 3sgte Options

[HardHead93]

I just got my MS3PRO EVO in for my conversion to standalone on my 4th gen 3sgte. I am planning on taking my time with this install to make sure all the wiring is correct and clean looking. To help with the install I grabbed a 5sfe ECU and mounting hardware out of a junkyard car to use as a template for mounting the Megasquirt into the car.









Got relays, distribution blocks, and different color wiring for a clean centralized install.




My goal is to wire the ECU up for as many features as possible and once I get good tune running, start enabling the features. I spent the last few days reading the instruction manual and it has me excited with how much it can do.

This post has been edited by HardHead93: Sep 8, 2017 - 8:15 PM

[HardHead93]

I started playing with the flex fuel settings in TunerStudio following some guidelines I read on various forums. The software has the ability to do flex fuel in one of 2 ways.
1. It can use the flex fuel sensor to add a set amount of timing and fuel based on ethanol percentage.
2. It can blend tables between a regular fuel/ignition/boost table and a e85 table based on ethanol percentage.

I chose the second because it gives more flexibility to make changes in parts of the table where AFR is too rich or too lean. Right now I am getting all the settings set up so that my next tuning session will not take that long. Here are the setting used for table blending.
Flex Settings

You have to be very careful when selecting these settings. Make sure if you plan to do table blending that the "Fuel Multiplier" is set to 100 on both low and high. Also the Timing addition needs to be set to 0 in both fields. You only used those values if you plan to do the option 1 of flex fuel tuning I talked about above. Changing those values will add fuel and timing on top of your table blending which could cause some problems (engine knock or flooded motor). Next is the table blending curve:
Flex Blending Curve

This tell the ECU how to blend your 2 curves. Most regular fuel has some level of ethanol in it. Whatever that is in your area (your flex fuel sensor will tell you), that is what you put as your first data point. For me we area at about 12% in our 91 octane fuel. The top of the curve will be 85% ethanol which is for a full tank of e85. The Blend % tells the ECU how much of the normal fuel and e85 fuel tables to use (0% is all regular fuel, 100% is full e85). I will warn you most pumps do not carry full e85. In my area it is more like e65, but you want your ECU to be ready if you do luck out on true e85. Next are my tables:
Flex Fuel Table 1
Flex Ignition Table 1
Flex Boost 1

On the left is the normal fuel table and the right is the e85. For my fuel table I added 46% across the whole board and let EGO control adjust from there (again I am just dialing in basic settings the tuner will sort out the rest). For timing I added 5 degrees across the board except in the idle areas of the map. For the boost it was a little more tricky. First I dialed in the boost settings for 14-15 psi on 91 octane. Then I ran the tank dry and filled it up with e85. I dialed in the boost settings at 16-17 psi for e85. I did this because you can run more boost and timing with e85 and you definitely feel it on the road. Now that I have some basic drivable settings with a well tuned 91 octane map, I will take it back to the tuner to get is really dialed in.