MS-II 8cyl COP Wasted Spark

dustobub · Post by **dustobub** » Tue Jun 13, 2006 12:02 pm

I am a little confused if this is even possible using the MS-II code, is it only available using the MSnS-E code?

I purchased and assembled the MS-II V3 kit from DiyAutoTune with 8 VB921s. I am installing it on an Audi 3.6 V8 in a Audi 90q. The engine currently has dual distributors but I was planning on tossing them. I purchased 8 COPs from 034motorsport and a 60-2 crank wheel. I know that 8cyl COP direct fire is not possible, guess it only works up to 6cyl but I am fine with running wasted spark. Is this setup possible using my current hardware? What software should I run? How should I wire the COPs and VB921s? Thanks.

Dustin

Bernard Fife · Post by **Bernard Fife** » Tue Jun 13, 2006 12:10 pm

I am a little confused if this is even possible using the MS-II code, is it only available using the MSnS-E code?

Dustin,

Well, it possible with many modifications to the code, but you'll have to write the code yourself. The MegaSquirt-II solution for 8 cylinder COP will come with the release of the router board that Al is working on.

The current MS_II code support a single ignition output. MicroSquirt code (which will run on MS-II) will support two ignition outputs (so 4 cyl wasted spark, but no more).

Lance.

mops · Post by **mops** » Tue Jun 13, 2006 12:15 pm

as far as I;m concerned, you cant do that as of yet.

your options right now:

1. wait for MS2-extra code - unknown ETA or
2. wait router board of ms2 (additional board for purchase) - aparently soon, but no confirmed ETA
3. setup EIDS8
4. possibly TFI or HEI will work for you, i'm not familiar with those systems.
5. stock mechnical dizzy ignition setup

dustobub · Post by **dustobub** » Tue Jun 13, 2006 12:27 pm

Could I use dual EDIS4 or EIDS8 to control my COPs? If I use EIDS8, I've read that they have an upper reve limit of 6000rpm. Would that be an issue I was just using it to drive the COPs?

I will probably upgrade to the router board when it is made available, but I need a solution within a couple of weeks. Thanks.

Dustin

mops · Post by **mops** » Tue Jun 13, 2006 12:46 pm

if you need soultion now, i'll try to make stock ignition go... for now.

I'm not sure of particularities od EIDS, cant help you with that.

muythaibxr · Post by **muythaibxr** » Tue Jun 13, 2006 1:18 pm

As far as ms2/extra goes, the upper limit there due to lack of outputs is going to be 8 cyl wasted spark.

As of right now, I've got 4 cyl wasted spark working flawlessly on the bench from 600 rpms to 8300 with a 12-1 wheel.

36-1 shows a little bit of missing in the 4000-5000 rpm range, but I think I have that issue figured out, just have to find more time to fix it.

After I get all the issues worked on on 4 cyl wasted spark, everything else should just work more or less.

I'm trying to get to this point before June 23rd, when I have to pass emissions in the car I'll be testing this stuff on.

Just a small update on ms2/extra.

IanS · Post by **IanS** » Tue Jun 13, 2006 2:53 pm

Does getting your car running for smog also involve 2nd wheel decoding? I remember you were interested in that a while back.

Good to hear about ms2/extra, though. I think that'll offer everything I need while I'm waiting for fancy toys like the router board.

mops · Post by **mops** » Tue Jun 13, 2006 3:11 pm

I'm not so sure aout router board. surly it will incerase capabilities of megasquirt (which is great), but then it will be just a product nigthmare....

-ms1,
-ms'n's,
-ms'n's extra,
-ms2,
-ms2 extra,
-ms2 with router board
-ms2 witho gpio board and with or without router board

and there will be at least two current codes for each as i know product development...

newbie people are already being consed between ms, ms'n's-extra and ms2, let alone when microsquirt, ms2 extra and other hardware options will be available...

MoveX · Post by **MoveX** » Tue Jun 13, 2006 11:33 pm

dustobub wrote:Could I use dual EDIS4 or EIDS8 to control my COPs? If I use EIDS8, I've read that they have an upper reve limit of 6000rpm. Would that be an issue I was just using it to drive the COPs?

EDIS is not very suitable to drive COPs, the spark is weaker than on VB921 and there is a rev limit. I only have tested it with EDIS 4 but more than ~8000 rpm aren't possible. With the 36-1 wheel and a VR sensor the sensors limit is near 10000rpm so the EDIS itself is the limiting component.

muythaibxr wrote:As far as ms2/extra goes, the upper limit there due to lack of outputs is going to be 8 cyl wasted spark.

As of right now, I've got 4 cyl wasted spark working flawlessly on the bench from 600 rpms to 8300 with a 12-1 wheel.

...

Is this the upper rpm limit or only first range of testing ? Are there rough plans when to release the first public beta or alpha of the MS2/extra code?

dustobub · Post by **dustobub** » Wed Jun 14, 2006 4:45 am

I guess for now the best solution seems to purchase a MS-I CPU and run MSnS-E driving the 8 VB921s in wasted spark. Have people been having good experiences with that setup? As far as downconverting my MS-II V3 board to MS-I, all I have to do is install the CPU and cut the
JS9 to S12C jumper wire. Right?

Then, when the MS-II Extra code comes out, I will throw my MS-II back in and hopefully be happy.

Dustin