LX9 crank relcutor - Megasquirt - Coil near plug

[bszopi]

Well Dave, you are actually wrong... :P



And really, if you just count the dimples, you can see that its 7+1 (8x) versus 6+1 (7x).

[bszopi]

I have a CAD drawing of the stock trigger, so I could probably print it out and see if everything aligns.

[Superdave]

I always wondered what those dimples were for... duh!

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I'd double check them VS a TCE trigger or an older crank but logically they should be correct. Those are the marks i was going to use to locate the 7x wheel on the crank when i go to my next build stage.

[dskopek]

Cool. Did you get that wheel from DIYautotune?

Yes i did, I removed the stock ring and pressed in a sleeve into the balancer that i mounted the wheel on. This way i have a external trigger that i can adjust very easy.

[bszopi]

the stock 3500 trigger wheel is marked with the 7x marks, you should be able to figure it out from there.

I always wondered what those dimples were for... duh!

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[Jonpro03]

Hey look at that!

[Superdave]

the stock 3500 trigger wheel is marked with the 7x marks, you should be able to figure it out from there.

[bob442]

the LS1 Is NOT 58x, it is 24x, a LS3-LS9 Is how ever a 58x

[Jonpro03]

The LS1 wheel is definitely not a 58x wheel. It's shown here on the left:

[CNCguy]

I have no experience with the LS trigger wheels but assumed they were like the LZ series wheels which are a 60-2 configuration and nowhere similar to the LX9 "digital format" wheel.

[bob442]

http://www.eficonnection.com/eficonnection/58x.aspx

lsx's are 58x reluctors
i suppous we could use a E38 ECM on our motors and just edit out the extra 2 cylinders

[Jonpro03]

I did not use the 7x wheel, I installed a 36-1 wheel on the back of the harmonic balancer and am using megasquirt to do everything from that.

Cool. Did you get that wheel from DIYautotune?


I got an email with the LX9 code in it, and a set of directions I'll post here for anybody else who decides to do this swap.

Attached is the updated code, but first, take a deep breath.

Download and load the MS2/Extra 3.1.0 release code as-is.

Be confident it has loaded and you can communicate with it in
TunerStudio.

If you were using a different MS2 code version before it _might_ be
worth getting your engine running on MS2/Extra with your existing GMDIS
setup - so you have a baseline.

Once that is ok and you understand the process, save the attached
ms2_extra.s19 in the place of the one you extracted from the zip file
and go through the firmware loading process again.

You won't need to change any project properties in TunerStudio this time
and it should connect ok.

In the title bar you should see the version as 3.1.+ and today's date.

If that passes ok, then remove power to your coils and injectors.

Load in your settings but this time set the spark mode to "LS1" and
output to wasted spark. Burn, power off, power on.

If you crank the engine, hopefully you will see some rpms and the three
LEDs will flash in sequence.

Next step is to hook up the coils (direct coil control) and strobe the
timing to see if it is anywhere close. The wheel phasing is set the same
as LS1 - you will have to find out if this is the same for the V6.

I can get most of this done tonight, all except the last step. In order to hook up the coils for direct coil control, I need to build 3 circuits on the megasquirt.

First, a modification to the tach input


Then, build a circuit for cam position sensor input


Then the modifications for output directly to the coils. Only need 3 circuits since I'm using waste-spark on a V6. (So no need for SparkD)


To wire it in, the crank position sensor goes to Pin 24. Cam position sensor to Pin 3.

Pin36 for SparkA, Pin4 for SparkB, and Pin5 for SparkC.

[dskopek]

I did not use the 7x wheel, I installed a 36-1 wheel on the back of the harmonic balancer and am using megasquirt to do everything from that.

[Jonpro03]

One of the Megasquirt Extra devs is sending me some code that assumes that TDC #1 compression is at the same spot on both reluctors. I'll be testing it tonight.

[bszopi]

I just marked a spot on the trigger wheel and a spot on the crank, with no regard to position.