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  #61  
Old 08-09-2013, 07:23 PM
BackWoodsBob BackWoodsBob is offline
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Re: The beginnings of a Megasquirt how-to guide

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Originally Posted by BRZCory View Post
About an hour and a half ago.



asdf
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  #62  
Old 08-09-2013, 08:25 PM
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Re: The beginnings of a Megasquirt how-to guide

What are you going to do for coils/igniter?
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  #63  
Old 08-10-2013, 06:13 AM
BackWoodsBob BackWoodsBob is offline
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Re: The beginnings of a Megasquirt how-to guide

hi? and I have talked about it and there is a guy on rs25 who's familiar with ms and the eg33. he seems to think keeping ignition dwell under 5ms will prevent a burnout from happening
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  #64  
Old 08-10-2013, 06:21 AM
BRZCory BRZCory is offline
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Re: The beginnings of a Megasquirt how-to guide

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Originally Posted by BackWoodsBob View Post
hi? and I have talked about it and there is a guy on rs25 who's familiar with ms and the eg33. he seems to think keeping ignition dwell under 5ms will prevent a burnout from happening
This. Although I'm still trying to figure out how to get MS2 to output 6 coil signals. I don't want to use the wasted spark because I'm not sure that the stock ignitor can handle that much current without some sort of ground upgrade. There are lots of options out there though if I can't get it working.

Also, as I hear, the signal should be set to Inverted(High), correct? At less than 5ms, and around 2.3ms for dwell (or is it duration?)

Worst-case scenario: EDIS6

Last edited by BRZCory; 08-10-2013 at 06:23 AM.
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  #65  
Old 08-10-2013, 09:48 AM
BackWoodsBob BackWoodsBob is offline
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Re: The beginnings of a Megasquirt how-to guide

iirc only ms3 can run sequential spark for a 6banger. the ms2 can't. unless Im remembering incorrectly.
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  #66  
Old 08-12-2013, 08:13 PM
dragoontwo dragoontwo is offline
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Re: The beginnings of a Megasquirt how-to guide

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Originally Posted by BRZCory View Post
This. Although I'm still trying to figure out how to get MS2 to output 6 coil signals. I don't want to use the wasted spark because I'm not sure that the stock ignitor can handle that much current without some sort of ground upgrade. There are lots of options out there though if I can't get it working.

Also, as I hear, the signal should be set to Inverted(High), correct? At less than 5ms, and around 2.3ms for dwell (or is it duration?)

Worst-case scenario: EDIS6
You should be able to batch fire our coils directly from the MS2 and not need to use the ignitor.
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  #67  
Old 08-12-2013, 08:48 PM
BRZCory BRZCory is offline
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Re: The beginnings of a Megasquirt how-to guide

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You should be able to batch fire our coils directly from the MS2 and not need to use the ignitor.
Hmm... I'll look into this.

Also, I see you're in Clarksville. Do you know an idiot by the name of Ben who's got an RX7 now (also running megasquirt). He's been through a couple scoobies (STi that rolled, Leggy, Fozzie, a few bikes )
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  #68  
Old 08-12-2013, 09:59 PM
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Re: The beginnings of a Megasquirt how-to guide

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Originally Posted by dragoontwo View Post
You should be able to batch fire our coils directly from the MS2 and not need to use the ignitor.
No, you'll need an ignitor of some kind. You can put them in the case with the MS2, but you do need them. The stock EG33 coils are dumb coils, that do need igniters. I think there may be newer subies that you can use the coils from, that are smart coils, and will fit right where the stock coils go, though. Maybe STI/WRX, but I'm not sure what engines/years. But LS coils are cheap and smart, and can make as strong a spark as you'll ever possibly need.
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'97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod

Now a mod "over there" ............Photo album
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  #69  
Old 08-13-2013, 05:27 AM
dragoontwo dragoontwo is offline
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Re: The beginnings of a Megasquirt how-to guide

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Originally Posted by icingdeath88 View Post
No, you'll need an ignitor of some kind. You can put them in the case with the MS2, but you do need them. The stock EG33 coils are dumb coils, that do need igniters. I think there may be newer subies that you can use the coils from, that are smart coils, and will fit right where the stock coils go, though. Maybe STI/WRX, but I'm not sure what engines/years. But LS coils are cheap and smart, and can make as strong a spark as you'll ever possibly need.
I believe you are wrong. The MS2 can control coil dwell times, which should make the dumb coils easy to wire in. I'll verify on the site later, but I'm pretty sure you can do this.
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  #70  
Old 08-13-2013, 05:28 AM
dragoontwo dragoontwo is offline
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Re: The beginnings of a Megasquirt how-to guide

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Originally Posted by BRZCory View Post
Hmm... I'll look into this.

Also, I see you're in Clarksville. Do you know an idiot by the name of Ben who's got an RX7 now (also running megasquirt). He's been through a couple scoobies (STi that rolled, Leggy, Fozzie, a few bikes )
I sure don't.
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  #71  
Old 08-13-2013, 05:46 AM
dragoontwo dragoontwo is offline
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Re: The beginnings of a Megasquirt how-to guide

Using the MS2 Extra code you can control multiple coils directly for wasted spark.
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  #72  
Old 08-13-2013, 05:54 AM
BRZCory BRZCory is offline
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Re: The beginnings of a Megasquirt how-to guide

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Originally Posted by dragoontwo View Post
Using the MS2 Extra code you can control multiple coils directly for wasted spark.
But from an electronics side, there aren't any transistors inside the megasquirt case that can handle the current from the coils (at least none devoted to that cause, there are the tip transistors, but they're for other electronics).

The issue isn't a control signal issue, it's an energy capacity one. Try to pass the full grounding force of the coil's inductor through the megasquirt main control chip is a recipe for bad mojo.

Hence the use of transistors (ignitor) especially oustide of the control box (because they flow a lot of energy, they create heat).

What you *can* do, if you have control of multiple coils, is just use the stock ignitor, because that's exaclty what it was designed for: Taking a logic-level input, and using it to control a power-level transistor (or darlington pair).
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  #73  
Old 08-13-2013, 05:59 AM
dragoontwo dragoontwo is offline
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Re: The beginnings of a Megasquirt how-to guide

Take a look at the MS2 extra manual. You add the required components when you do it. Using a BIP373, it becomes possible. It looks like they changed it up a bit since I built mine. I could have swore they used 1 VB921 per ouput instead of 2 BIP373.
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Last edited by dragoontwo; 08-13-2013 at 06:26 AM.
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  #74  
Old 08-13-2013, 10:46 AM
BackWoodsBob BackWoodsBob is offline
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Re: The beginnings of a Megasquirt how-to guide

Quote:
Originally Posted by dragoontwo View Post
Take a look at the MS2 extra manual. You add the required components when you do it. Using a BIP373, it becomes possible. It looks like they changed it up a bit since I built mine. I could have swore they used 1 VB921 per ouput instead of 2 BIP373.
Cory purchased a used MS2 that was pre-assembled so he may not have the option to add this in.
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  #75  
Old 08-13-2013, 10:48 AM
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Re: The beginnings of a Megasquirt how-to guide

Cory's right. The MS spark outputs are logic-level, not powerful enough to actually fire the coil.

You can add ignitor modules to the board, and then fire the coils from those. Dynomatt did just that with his (wasted spark).
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'97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod

Now a mod "over there" ............Photo album
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