MS-II Sequencer
 

Who is getting ready to switch to MS-II sequencer? Ive started my homework on it and I'm discovering some neat features about it. I think I am going to order it as soon as it comes out.

link?
I'm not up and up on my MSII.

I can't afford it.

There are so few of us that are MS-II even that I can't imagine many people jumping on board, but if you do, please report back as we need people to pioneer (cough...cough....guinea pig:)) stuff like that. Hell, there was a time when going emanage was a big deal and MS-I wasn't even on the radar.

Hehehe...I know exactly what youre saying. I'm actually trying to pick out igntion components so I can take advantage of its COP feature and I mean individually fired COP. Its pretty interesting stuff.

I will as soon as I can afford it.

should be swopping to MSII over the christmas period too. exciting times for us DIY MegaSquirters :)

So this must be what became of the router board. My big attraction for the original router board concept was the ion sensing. That got dropped because there was trouble getting the crank angle measured accurately enough to do any good. Last spring (I think) I remember reading a post by either Bruce or Al that they may have solved that problem and there was some hope we might see ion sensing again. I didn't see any mention in the link that RDSnake posted, though.

For anyone that doesn't know, ion sensing has the potential to do for spark what wide bands have done for fuel. Perfect ignition timing without a dyno.

Other random bits of info: We would also need a capacitive discharge ignition (CDI) system to make use of it. I think, but cold be completely talking out my ass, that GM used a system like this around 2000 for mis-fire detection (no crank angle calculations).

On a completely separate note, I'm a little concerned that more and more MS parts are coming in SMT. I hope us DIY'er aren't forgotten.

BTW, I posted this last April and not one god damn response. I hate you guys.
https://www.miataturbo.net/forum/showthread.php?t=8831

You can do this with MS1, no 500$ board required.

Hehe, sorry, but that's a little over my head. I could offer you no advice other than give it a try and let me know if it works. :bigtu: Oh, your ion spark talk stuff sound really interesting. I'm gonna have to do some research on that. Let me know if you got any good links on it.

Comeon Arga we can't help it that we are both cheap and not bold enough to dabble in MS2

In layman's terms, what exactly is the benefit of this board?

fully sequential injection and ignition

Why would I want to step down to MS-I from MS-II?

You wouldn't, however since It has been done with no 500$ board on MS1, I am sure it can be done without a 500$ board on MS2.

You cannot be serious spending that kind of money on a megasquirt.

This is a direct quote from the megamanual website:
"The price for the MS-II Sequencer has not been set yet. Initial estimates are that it will be a 35 - 40% increase over the cost of MicroSquirt, since there are roughly 35% more components, and the added harness assembly, Ampseal connectors, assembly cost, and enclosure, plus the extra cost for the aluminum and panel cutout for the second connector. Since MicroSquirt retails for about $400, the estimated price is likely between $520 and $580. This could change somewhat, but is a reasonable ball-park figure. When pricing is finalized, it will be posted here."

How much is a MSPNP and what kind of MS would you get if you bought one?

Yeah - I was pretty excited about it, but I'm not sure about the mechanism they are going to use - it really seemed a lot more aimed at V-8s. I was a little worried about the accuracy of the whole thing. Like, do they really need to scale a factor of ten? And, what keeps MS limited to two channels, anyway? That doesn't make sense to me.

SMT isn't so bad, and you can still mod it. Sure, it's a little more of a pain, but not a lot more. Getting a board built then swaping a few things out is still possible. I almost did it on this one.

I, too, and really curious about this ion sensing. A lot of stuff gets done for emissions than have no benefit to power output... And generally mask problems (think MSD folks).

I guess you could technically build your own sequencer external box, but I wouldn't. :-)

It's a couple of things that limits the current model to two channels, mostly processor outputs and keeping the board backward compatible with MS-I. Each injector channel needs two outputs, one for the regular pulse and the other for PWM current limiting. Some people have talked about modifying an MS-II for sequential injection on four channels by adding peak and hold driver boards to it, but this may be some ways away.

The Sequencer was something Bowling & Grippo decided to build because there has been a lot of demand for sequential injection and the hardware was almost close enough to do this. So they gave it a little extra push to make it sequential. Ion sensing is going to require a much faster processor to make it effective. Bruce and Al haven't given up on ion sensing, but it's going to take a more powerful processor and more complex hardware to pull it off.

Matt Cramer:
Do you guys or MS retailers have a more definite ETA on the sequencer?

I have one. It is a board based off of the V2.2 board with addition circuitry put into the board layout.

It is actually the only board design that I know of that lets me flash MSQ's without having to unplug the coils.

I didn't design the board, so I dunno why this is possible.

So the other outputs aren't "high speed" enough? Otherwise even something like the LED outs could be used. :-) A friend of mine (who knows a bit more about MS than I) said there's 4ns pulsing on those PWM lines, but I can't see it being better than 40 - am I missing something here? Anyway, its well within what you'd need anyway - and I was just suprised to see a chip that can talk to the outside world at the same rate it runs at (I'm too used to PC's with a "front side bus) a huge step slower (FSB of a couple hundred MHz to the CPU's core of a Ghz or three.

If it's based on V2.xx, does that leave V3.xx people orphaned?

I got that much... but what benefit does sequential injection have? Smoother engine? More power? Better gas mileage? Easier to tune?

Actually, the Sequencer is its own surface mount board that's more closely related to the Microsquirt than anything else. It's possible that there may be an add-on version of it for existing Megasquirts, but there's no promises there.

Sorry, we don't. It's still in early testing stages and sometimes you never know what turns up there.

Read up much? http://www.megamanual.com/MS%20FAQ.htm#sequential

Sequential injection improves low rev mpg, you can run leaner at idle and it smooths the idle out too.

power is negligable to zero in terms of gains, at WOT the injectors spend more time on than off so sequential batch or bank fire it's all pretty much of a muchness.

Again, in reality this is only a gain for smoother idle, but it should allow you to run much bigger injectors, so you don't necessarily be running them for half your cycle (though it's a bit of a waste not to I suppose). Also, if you can control that many injectors at once, you could do a very competent staged injection, again, something that will clean up idle, etc, without making much more power. But if you were in a gas mileage competition or some other esoteric thing there's an advantage.

Also it likely helps on many-cylinder engines, in the same way.

I am after over all quality of the cars' driveablility. Who wouldnt want factory like idle, tip in and transition? The difference in horsepower numbers may be negligible but overall quality of the setup would surely improve. Of course, for somebody who drives at WOT all the time, it wouldn't make much of a difference, would it?

It's what separates man from savage beast, and miatas from dsms. :-) I love that my car seems stock, except it's a whole lot faster.

Low ohm injectors and sequential injection are two big improvements, as are staged injectors. Then again, so are stock cams.

Someday, I'll get biggie cams, you know, when I get biggie pistons and blocks and such.

Dont forget spelling!!!
We live in a savage world inhabited by cavemen, dont we....