Hi guys im looking at upgrading my MS1 to Ms3. I have pmed muythaibxr a few times about this subject but I think it would benefit everyone if its up on a thread. I really want to know what I need to remove from the MS1 in order to install the MS3 and MS3x. I have the vr conditioner and spark outputs done. I also want to get rid of the CAS, it will be replaced with the Full Function Engineering 36-1 toothed wheel with hall effect sensor. I will be also adding boost control. I really wish there was a write up on this, so I think I may be doing a writeup for people once I get all the information gathered up. I would really appreciate all inputs on this subject and will be doing a write up so no one else has to deal with this!

For CAS wiring: from muythaibxr
The Ne+ goes to pin 24 on the main board, Ne-, and G- wires go to ground pins on the main board, the G+ goes to the cam input on the ms3x board.


More from Muythaibxr
First, what you're going to need is ms3 + ms3x.

MS3 is the board that has the processor on it, and the ms3x is an I/O board that plugs into that.

If you plan on upgrading, you'll want to remove essentially all the mods you've done to the v3 board. You'll need to purchase the taller ms3 case from DIYautotune as well.

As far as I/O goes, you'll want to run the idle valve, the injectors, and the coils off the ms3x board, and you'll need to run power grounds to the ms3x as well. You'll also want to connect the G+/G- wires to the ms3x.
It's pretty straightforward. You'd just need an ms3 daughtercard and an ms3x expander.

Spark A is leading, B is trailing, and C is coil select on the ms3x board.

You'd also want to rewire your injectors to the ms3x board... output 1 is front primary, output 2 is rear primary, and 3 and 4 are front and rear secondary respectively.

You would also want to get rid of all mods you've made to the v3 board and run everything off the ms3x board... so you don't need a 2nd trigger conditioner added anymore b/c that's on the ms3x, and you don't need an upgraded idle speed control circuit for the BAC, because that's also on the ms3x.


Does this mean pull up resistor for spark too? Preety much to a purchased MS1 kit from Dyiautotune?
Thank You,
Jose Nieves

 

Why Hall and not VR?

The MS's inputs are really designed for VR. You can make them work with hall but once you get it working, it's not going to really help anything to go with Hall.


Ken

 

So you are recommending I stay with a sine wave sensor(reluctor)? Would you be able to help with configuring the full function engineering 36-1 wheel to the ms? Am I also getting rid of the spark leds in order to run ms?

 

I'm just saying that set up properly, hall and VR are equally reliable.

I've actually seen several people replace VR with hall in the name of getting a cleaner signal only to find that they have just as much trouble with it as with VR.

As far as configuring the firmware for 36-1, that's going to depend on how you phase the 36-1 wheel.

Ken

 

what about using the stock 2nd gen CAS, unmodified? works with the ms3x? or do you need to mod the board like the ms1?

Ideally, i would like to hop my ms3/x(s) from a MPI V8 to a 1.7 propane powered honda, and to and from my rx7. this would be with each of the engines having there own pre terminated harness. the rx7 also needs to be able to revert back to the stock ecu(no cutting the cas)

 

Just use the ms3x. It works fine.

Should work out OK with that.

Ken

 

Ok so i will stick with a regular sensor then. The kit I will be using is a full function engineering kit. Ill get more info on it.

Ken, are you saying the the only mods I need to take off my board would be the vr conditioner, idle circuit? I also have an egt circuit , should I get rid of that?

 

That will need to stay installed (EGT).

Ken