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PostPosted: Fri Oct 13, 2017 8:15 pm 
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Joined: Tue Oct 27, 2009 6:39 pm
Posts: 336
The only MS ecu's that could drive coils directly are microsquirts. This is what I have. There are a lot of drawbacks to to the small footprint that don't make sense for a race car IMHO now that I have run one.

If you have anything else (Megasquirt 2 or 3) you need an "ignition module" or "igniter" that takes a signal from the ecu and "fires" the coil" this is what the quadspark does.

The LS coils have built in igniters if I recall correctly, but I have not gotten to that point on planning the MS3 for my car.

Talk to the guys at DIY.

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PostPosted: Fri Oct 13, 2017 9:23 pm 
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Joined: Fri Aug 12, 2011 4:03 pm
Posts: 179
Location: Northeast PA
I don't use MegaSquirt, I use a ViPec V44 which also does not have onboard ignitors.
I used a Bosch part for VW / Audi 1.8T cars (4 cylinder)

Bosch
4D0905351

http://www.ebay.com/itm/Bosch-Audi-VW-Ignition-Control-Module-4D0905351-Brand-NEW/351295139127?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D20160908110712%26meid%3D5508e90ad7e84ce4abd28795f1e3d183%26pid%3D100677%26rk%3D3%26rkt%3D30%26sd%3D152584038161&_trksid=p2385738.c100677.m4598

Its not cheap, a real Bosch one is in the ~$80 range, but they have proven very reliable.
There are other off brand URO / Meyle / generic ones that are way cheaper, but I have only ever tried the real Bosch ones.

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Jimmy Pettinato
88 BMW M3 - SPU #98


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PostPosted: Sat Oct 14, 2017 4:24 am 
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Joined: Mon Jan 05, 2015 8:45 am
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Having now Read The Fine Manual (RTFM)...

The MS3X is capable of providing a 5V logic signal to the LS coils and they do have a built in igniter. The IGN1A coils on DIYAutoTune are based on the LS2 coils, but having a slightly higher current capacity. In looking at the LS2 coils on Summit, it seems that the IGN1A coils are less expensive than many of the higher options, but more expensive than the cheaper options.

Seems like I have a clear path now. Will report back when I start to get the parts and build the system.

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Bill H
92 Saturn SL2 - SCCA F-Production


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PostPosted: Sat Oct 14, 2017 10:38 am 
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Joined: Tue Oct 27, 2009 6:39 pm
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Using an off the shelf ls truck coil has the advantage of spares being available damn near everywhere.

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Chris Schaafsma


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PostPosted: Sat Oct 14, 2017 3:38 pm 
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chois wrote:
Using an off the shelf ls truck coil has the advantage of spares being available damn near everywhere.


Dang it, Chris. Stop making sense!! :lol:

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Bill H
92 Saturn SL2 - SCCA F-Production


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PostPosted: Mon Oct 16, 2017 11:29 am 
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Joined: Fri Nov 06, 2009 5:08 am
Posts: 1162
Location: Philly
We used those IGN1 coils in a recent project, and they've worked flawlessly.

One odd thing is they have three separate grounds, each of which needs to go to a unique location. No big deal, but weird.


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PostPosted: Fri Nov 17, 2017 8:10 am 
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Joined: Tue Sep 03, 2013 1:03 pm
Posts: 34
Location: Upstate SC near CLEMSON!
I have a MS 3X system on my Miata. Been using it on the race car and multiple street cars for years. Have a lot of miles on a supercharged Miata with this setup. Plan on putting it in two other turbo Miatas of mine, one a stock engine bolt on system and the other a pure turbo build up.

I use a Bosch Igniter feeding Denso Coil on Plug coils. The igniter is for an Audi A8 and the coils are for a Suzuki GSXR that spins to 14.5k rpm. The A8 igniter gives us 4 channel output for sequential spark.

The 3X module feeds the igniter module perfectly.

Anyone that tries this, use real Bosch and Denso components. The interweb is full of cheap Chinese knockoffs that WILL crap out.

Henry


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PostPosted: Fri Nov 17, 2017 9:57 am 
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Joined: Fri Nov 06, 2009 5:08 am
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Location: Philly
You cannnot run stock LS coils without an ignition driver.

You can run the “ign-1a” coils without a driver. They have drivers built in.


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PostPosted: Fri Nov 17, 2017 2:28 pm 
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Joined: Tue Sep 03, 2013 1:03 pm
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Location: Upstate SC near CLEMSON!
There is also a "Quad" driver setup from DIYAutotune for the MS 3X. On line instructions for that setup and we have installed that setup on one street car.

I like the Bosch/Denso setup better.

Henry


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PostPosted: Sat Nov 18, 2017 8:50 am 
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Joined: Sun Aug 18, 2002 6:16 pm
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Location: Oregon City, Or.
Bill, coming to this topic late. Motec sells a dis 2 coil pack with gm coils and a control module. I have run these on several different cars with no issues except 1. Grounding the coil packs directly to the chassis is a must. After the first module failed I bought 2 spares and have never needed them. They turned out to be Saturn modules and coil packs.

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