Removing EDIS to drive coils directly.

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spudmurphy
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Location: Lancashire, UK

Removing EDIS to drive coils directly.

Post by spudmurphy »

Hi,

I've swapped the engine in my project car and in doing so have removed the 36-1 trigger wheel and EDIS module with the intention of driving a ford coil pack directly from my MS1 V3 using a VR sensor and a 60-1 wheel. The car was running fine with EDIS before the engine swap but I've removed all the mods made to MS for that and made all the changes I think are required for direct driving the coils with BIP 373's in line with the instructions on the DIY Autotune website.

What I'd like if possible is someone to sanity check the changes I've made before I plug it all in and try for a first crank.

Removal of EDIS mods;
- removed C30
- removed a wire from top of C30 to S12C
- removed a jumper from TACHSELECT to XG1
- removed a jumper from OPTO OUT to TSEL
- removed a 750 ohm resistor that went from the -ve of D14 to the proto area and a wire from D14 to IGN

Trigger Inputs for VR sensor
- both pots have been adjusted fully counter clockwise
- TACHSELECT jumpered to VRIN
- VROUTINV jumpered to TSEL

Coil Drivers
- 2 BIP 373's installed on the heatsink in the positions for R37 and R38
- 2 off leads made with a 330 ohm resistor. One of these goes from the top of R26 to the left hand leg of the BIP designated for Spark A.
- the other goes from the top of R29 to the left hand leg of the BIP designated for spark B
- added a wire from the middle leg of spark A BIP to IGN
- added a wire from the middle leg of spark B BIP to SPR4
- added a wire from the right hand leg of spark A BIP to the right hand leg of R37
- added a wire from the right hand leg of spark B BIP to the right hand leg of R38
- a jumper installed between IGBTOUT and IGN
- removed R57
- soldered a wire between SPR4 and pin 6
- Ground wires have been run from pins 8 and 9 on the DB37 connector to the same chassis ground that everything else uses
- coil trigger wires run from pin 36 for spark A and pin 6 for spark B to the coil pack


Sooooooo..... does all that sounds about right? thanks for looking !

From the EDIS MODS I have D1 and D2 jumpered and a 1K resistor in R12, can these be left as is or do I need to change anything?
Also R37 and R38 are not installed and have been jumpered, is this right?

Spud
All these new words are starting to make me feel a little bit sick.
Matt Cramer
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Re: Removing EDIS to drive coils directly.

Post by Matt Cramer »

That looks right. I'd run R37 and R38, but that's personal preference.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
spudmurphy
MS/Extra Newbie
Posts: 24
Joined: Wed Mar 01, 2006 6:12 am
Location: Lancashire, UK

Re: Removing EDIS to drive coils directly.

Post by spudmurphy »

Thanks Matt, I appreciate a sanity check!

What do R37 and R38 do for me? I think I jumped them on the advice of the v3 build instructions.

Thanks

Spud
All these new words are starting to make me feel a little bit sick.
Matt Cramer
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Posts: 17499
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Re: Removing EDIS to drive coils directly.

Post by Matt Cramer »

They add an overcurrent protection feature to the injector outputs.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
Bzltyr
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Joined: Thu Jul 01, 2010 1:11 pm

Re: Removing EDIS to drive coils directly.

Post by Bzltyr »

How would these changes differ if using the 36-1 trigger?

Thanks.
Matt Cramer
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Re: Removing EDIS to drive coils directly.

Post by Matt Cramer »

Bzltyr wrote:How would these changes differ if using the 36-1 trigger?

Thanks.
They wouldn't.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
Bzltyr
Experienced MS/Extra'er
Posts: 208
Joined: Thu Jul 01, 2010 1:11 pm

Re: Removing EDIS to drive coils directly.

Post by Bzltyr »

Thanks. I am thinking of going this route. I may have more questions.
Bzltyr
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Re: Removing EDIS to drive coils directly.

Post by Bzltyr »

Thanks.
Bzltyr
Experienced MS/Extra'er
Posts: 208
Joined: Thu Jul 01, 2010 1:11 pm

Re: Removing EDIS to drive coils directly.

Post by Bzltyr »

- VROUTINV jumpered to TSEL

Why set it up to be inverted? Why not TSEL to VROUT?
Paul_VR6
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Re: Removing EDIS to drive coils directly.

Post by Paul_VR6 »

Ms2/3 it doesnt matter. Ms1 needs to be inverted (if you want the sensor
wiring to be "right") as you cant invert in software.
-Paul
1992 Corrado SLC 3.6 VR6 11.38@120 - MS3 Pro Ultimate - Microsquirt I/O - Can EGT - Racepak IQ3s
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DaveEFI
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Re: Removing EDIS to drive coils directly.

Post by DaveEFI »

spudmurphy wrote:Thanks Matt, I appreciate a sanity check!

What do R37 and R38 do for me? I think I jumped them on the advice of the v3 build instructions.

Thanks

Spud
They are part of the protection system for the injector drivers on the V3 board. I've seen plenty remove them and fit other things there - but there's no reason why the can't be left alone and the BIPs fitted elsewhere.

Personally, I'd fit the BIPs external to the MS to prevent having high current ignition pulses etc flying around inside MS and the loom from it. Bit like EDIS. :D
Rover SD1 3.5 EFI
MS2 V3
EDIS
Tech Edge O2
London UK.
Bzltyr
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Re: Removing EDIS to drive coils directly.

Post by Bzltyr »

Paul_VR6 wrote:Ms2/3 it doesnt matter. Ms1 needs to be inverted (if you want the sensor
wiring to be "right") as you cant invert in software.
So jumper wire to VRoutINV instead of VROUT from TSEL?

Thanks for the help.
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