matnrach
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| posted on 2/12/07 at 05:25 PM |
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Megasquirt II
Hi,
Anybody know the real benefit of a MS-II over a MS V3?
I will be using an EDIS, 36-1 pulley with VR sensor.
Thanks.
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MikeRJ
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| posted on 2/12/07 at 05:56 PM |
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quote:
Originally posted by matnrach
Hi,
Anybody know the real benefit of a MS-II over a MS V3?
They are two separate things. The V3 is the revised PCB design with on board coil drivers and more triggering options etc.
The MS2 is a faster 16 bit CPU module to replace the original 8bit CPU. Extra CPU horsepower and memory gives you far better timing resolution for
injection and ignition events (1us compared to 0.1ms) and the raft of extra features such as a CAN bus, on board stepper motor driver etc.
I think the MS2 needs to be used with the V3 PCB, but not 100% sure on that.
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matnrach
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| posted on 2/12/07 at 06:08 PM |
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Does the MSII have the additional VB921 circuit?
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MikeRJ
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| posted on 2/12/07 at 06:12 PM |
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quote:
Originally posted by matnrach
Does the MSII have the additional VB921 circuit?
Again the MS2 is a CPU module, it is not the main PCB so the answer is no.
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MikeRJ
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| posted on 2/12/07 at 06:12 PM |
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quote:
Originally posted by Dragon-Performance-Eu
quote:
Originally posted by MikeRJ
The V3 is the revised PCB design with on board coil drivers
MS-I v3.0 board has only one coil driver on the board as standard. Full 4 cylinder wasted spark without a distributor requires addition of 1 extra
VB921 circuit.
Yes, I didn't mean to pluralise "driver" 
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matnrach
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| posted on 2/12/07 at 06:32 PM |
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Thanks for the info.
I thought the Edis contained the coil drivers or am I wrong.
If so you wouldn't need the extra circiut on the V3 board?
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Jenko
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| posted on 2/12/07 at 07:39 PM |
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With MSII you have a choice as to how you drive your coil.......You can either wire in EDIS and simply use it as a coil driver, or simply build an
external module with a couple of drivers in it - This is a much neater option. However EDIS will do the job perfectly well, I also think the inbuilt
limp home mode of EDIS will still work............
For a 4 cyl engine, it really is a case of two wires to two drivers (basically a big transistors). These connect to the coil pack with one of the coil
pack wires to 12v......each transistor is simply grounded to give the required signal.
If this is a new build, then I would always go for the latest versoin..........
I've just started MSII V3.57 converison.....
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Werner Van Loock
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| posted on 2/12/07 at 07:59 PM |
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If you're going to use a EDIS4, then consider the microsquirt, same a MS-2 but in a much smaller package and sealed/robust.
It has ditched a lot of extra's, but most people don't use them anyway.
Check out http://www.microsquirt.info
and
http://www.diyautotune.com/
and to make the confusion even worse you could take a look at the VEMS unit.
http://www.vems.hu
http://www.clubstylus.be
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matnrach
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| posted on 2/12/07 at 09:33 PM |
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Microsquirt looks really interesting.
I guess it has all the functionality of MS II.
Anybody got one?
Any commnets?
Thanks
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oadamo
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| posted on 2/12/07 at 09:55 PM |
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ms2 you can use lunch control and flat shift. adam
[Edited on 2/12/07 by oadamo]
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daxtojeiro
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| posted on 2/12/07 at 11:35 PM |
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Hi all,
there appears to be a load of confusion over MS1 and MS2 and V3.0, etc, etc.
A V3.0 is the main PCB, this can take an MS1 or an MS2. The older V2.2 isnt worth buying these days so stay clear of it, the V3.0 isnt much more money
to buy and is a far better board.
The MS1 is the original MS microprocessor that can control edis or direct coil drive (up to a V12), etc, etc, etc, it can also do launch, boost
control, water injection, etc, etc.
MS2 replaces the MS1 microprocessor and it has more memory and RAM, BUT it can only control 4 spark outs (V8 wasted) it can do almost all the
functions that MS1 can do, except water inj.
Personally theres little in real terms between them, if you want EDIS then go for an MS1, if you have a setup like a 60-2-2 then youll need an MS2,
see here for more details on what MS1 and MS2 can do:
http://www.extraefi.co.uk/ms1_or_ms2.htm
Phil
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daxtojeiro
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| posted on 3/12/07 at 05:28 PM |
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Ive made a new page that explains a few MS terms, etc, this may help some people out :
http://www.extraefi.co.uk/glossary.htm
If I need to add anything please let me know,
Phil
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