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Old 06-27-2012, 09:41 PM   #1
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Default MS1 1.6 to BP-Z3

Hi, I have a MS1 PCB3.0 assembled for a 1.6 (1990) standalone.
I did the next modification to it:
-Spark out inverted circuit
-fan mod
-fast idle mod
I know Iím asking alot of technical questions about the swap, but I though the MS section was appropriate for my questions, since I have a MS tuned for a early 1.6 and want to swap to a later 1.8.

I blew my B6 lately to what I think is a bad oil pump.
I found a 2002 NB BP-Z3 and I am looking forward to swap it in my 1990
I am planning on doing what I think is right:
-B6 fuel pressure regulator
-B6 coils
-All pigtails, sensors, Ö. From the B6

I donít know if I can use the hall effect sensors from the cam sprocket and from the crank pulley instead of having to fit the B6 CAS.
I also heard the alternator was different, or something needed to be done to the MS circuit (from what Abe was quoted somewhere in this section), do I need to do something or can I use my B6 alternator and make the NB pulley fit on it?
Here comes my big concern, I would like to know if I can run the engine like a B6 without controlling the VTCS and the SV-T from the ECU or if one of those things is controlled by the oil pressure? I guess the intake can be left with only one plenum, but I donít know for the valves.

Thank you alot, Iím waiting for your precious suggestions!
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Old 06-28-2012, 09:04 AM   #2
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Originally Posted by Reverant View Post
I have ordered an MS for my '02, 1.8lt VVT 6-speed. Here's the scoop:

1) You can't use the cam angle sensor on this engine. The VVT system continiously varies the intake valve phase so no luck getting a reliable reading. To that end, I bought a cam angle sensor from a 1.8 94-97 NA (magnetic type), which fits on the exhaust camshaft, plug and play. This give both a generic firing event as well as cylinder selection (ie which set of cylinder plugs to ignite). You might as well forget the idea of controlling the VVT with the MS; this VVT system is just too complicated to control, leave it up to the stock ECU.

2) The fuel system is returnless; fuel pressure in the fuel system can be controlled by altering the voltage to the fuel pump (unsafe) or by adding an external FPR.

3) The alternator is controlled by the ECU, so forget having a fully standalone setup unless you swap your alternator with one from a NA miata.

The MS should be here any day now, along with an LM-1 wideband. I'll keep you posted on how it goes.

So I found out some answer from Reverant, that answers my questions about the alternator control and the CAS

Last edited by absRTP; 06-28-2012 at 09:16 AM.
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b6, bp-z3, megasquirt, ms, swap

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