420A MAF/MAP COMBO MS3XTRA?

[fisher83]

So here is my set up: 10.5:1 comp, plan on running my 14b at around 10-12 psi with pump gas (hopefully) with the right tune. I have audi/volkswagon 4 pin logic cop set up. My ms3 came with the nipple for a MAP that I soldered into the ms3 board, but I also read that I can control just about anything I want to with it. So my question is, will a single map sensor on the 420a be enough to get an accurate tune or should I go stand alone maf, maf/map combo or dual maps? If ia single map is suffices, should I wire in the stock map, or use the one thats installed on my ms3? Keep in mind id like to keep it on pump gas and try to avoid wet/meth if at all possible. Any tips/tricks in the right direction would be great. It is not instled right now so I have no specs on what my car is doing. This is a pre install question so I can have it done now instead of doing it later on down the road. Thanks.

 

[VelocitàPaola]

The single MAP should be sufficient. You want to use the MS MAP sensor, because the stock 420A sensor can't read boost.

 

[LeeSD1]

The map sensor on the ms unit itself is all you need. It runs on speed density which doesn't use a maf.

 

[fisher83]

Was figuring on the ms map, its a 2.5bar sensor. I Wasnt sure if I could get more tune ability with a pre and post turbo map. Also, should I use the stock location for the map or relocate?

 

[dsmcrzy]

The map sensor for the Megasquirt is on the main board so you will need to run a tube to it.

The way I did this was just tapped into a nipple on the intake manifold with some vacuum hose, attached that to a piece of brake line to get it through the fire wall and then another piece of vac hose to the ms unit.

My ms is in the glovebox.

When I eventually get my new tucked wire harness made I will be using a bulk head nipple to get the hose through the fire wall.