TrickerZ

iTrader: (6)

Where did you pick up that wiring harness? I'd like to make one as well.

Splitime

iTrader: (24)

That green harness should be a Boomslang harness. The silver/black part looks to be a DIY autotune pigtail harness for the MS.

So basically 2 harnesses.... setup together to retain the stock ecu and allow MS to control what it needs too.

If you want to do MS as a standalone... you can just buy that DIY harness and a single plug from Boomslang.

Braineack

iTrader: (62)

everything is pre made there.

the db37 connector and the boomslang.

I'll be build both myself next time, but i wanted to focus on building the MS this time and not worry about fabricating a wiring harness.


Firedog, I could pre assemble one, but who charge somethign very close to hat DIY would charge assemebled...and then I'd have no clue how to modify it for a subby.

firedog25

So, let me ask a dumb dumb question because right now it's really hard for me to read long articles (pain killers).

The MS can control fuel, spark, timing, do the whole wideband input thing, and knock sensor? I've been eyeballing the kits a lot lately.

Matt Cramer

You can set it up to do all of these. There are a few mods for spark control (covered in the articles), and wideband oxygen sensors need an external controller like an Innovate LC-1 or equivalent. For knock sensing, there's some build-it-yourself circuits, or you can use a KnockSenseMS external device.

firedog25

So for knock sensing, does it pull timing? I'd read about it, but like I said, precription meds are making it hard for me to retain stuff. :(

And in case I forgot, thank you guys so much for the information that I'll have to pore over again and again in an effort to retain some of it!

Braineack

iTrader: (62)

yes, you can retard ignition when it detects knock.

it can retard at the first sign of knock.
it can retard more at the next sign of knock each.
it can set the max about of ignition retard if decting knock.
it can advance ignition when no knock is present.
it can also pull/add boost if when using an EBC with MS.

Ben

iTrader: (33)

Just to clarify, if the MS has reduced advance due to a knock event, it will slowly re advance the timing back to the value listed in the spark table. Obviously this occurs only if there are no more knock events.

Which is unlike the Link, which will reduce advance at the hint of knock, and keep it reduced until the ignition is cycled.

firedog25

Ooh, then I think MS is the ticket for me. We regularly see temps in the 110-130 range easy in the summer time. I am running non-intercooled at the moment. Something like that would be great for me. I'm in the process of building an engine up so I'll be MS'ing when I install the new engine. NOW, which unit to get? MS1 or MS2?

Matt Cramer

Depends on what year you have, but as a general rule the MS-I is the better tested choice and has much more documentation for how to put it on a Miata.

TrickerZ

iTrader: (6)

Hey Ben, what are you using for your EBC? I have a Greddy as well (innercooled) and am looking to get a MS-I and EBC.

Braineack

iTrader: (62)

MS controls it.

https://www.miataturbo.net/forums/showthread.php?t=9974

Ben

iTrader: (33)

MS has been doing a really good job w/ open loop boost control. Playing with closed loop boost control now, and so far it seems to be working great.

TrickerZ

iTrader: (6)

I know that, I was wondering what solenoid and FET he's using, as well as any other quirks he may have had to band-aid, or things he would have done different if he knew about them before.

EDIT: I should probably read links before saying stupid things...my appologies

Braineack

iTrader: (62)

ah no worries. I belive he's using the GM solenoid.

Ben

iTrader: (33)

Cyclone/Typhoon solenoid from the Chevy dealer. I didn't build the BC circuit on the MS (bought it all pre done as a PNP unit), so I can't answer for what's inside the box. However Braineack has a thread on here you could search out with the procedure detailed.

Only regret/complaint is my shitty WG can. But that's not a EBC problem.

Braineack

iTrader: (62)

you can buy the mod on their site now, i believe the FET is the same i have in my writeup. I could go look at the package, but im too lazy right now to get off my couch and look.

firedog25

It's a 1991 Miata 1.6 liter still. I have no intention of changing up to the 1.8 especially since my new engine is sitting in my garage now. I'm going to start disassembly this weekend.

SO What exactly is the difference between MS1 and MS2? I've seen there are two different CPU's. I think I can probably assemble this thing myself though, I was looking at the kits and it seems easy enough. I want it to control fuel, spark, knock, timing. Is MS1 suitable? The tuning software for MS is graphical user interface right? I'm sure I could learn the programming language if I absolutely needed to, but it'd be so much easier to just enter values in a menu.

Braineack

iTrader: (62)

yes, MSI is best for now. all it is, is basically a slower cpu.

megatune for the software. see the "software install" thread.

firedog25

Ok, one more question, throttle position sensor thing... any of you guys run one? Don't the automatic throttle bodies have a tps? Any advantage to using one over not?