Correct jumpers to use

All questions about MS2/Microsquirt/Microsquirt module. See also MS2/Extra manuals

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91EVO
MS/Extra Newbie
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Joined: Wed Dec 06, 2017 9:05 am

Correct jumpers to use

Post by 91EVO »

My engine 383 Tune Port injected with a Procharger supercharger running for 10 years on a modified Cyclone/typhoon ECM
I have been reading everything I can find for the last two weeks on setting up my system jumper wise. Just when I think I have it figured out I come across an different article saying do it this way. Here is my system, I built my Megasquirt 2 with a V3.0 board running Extra 3.4.2 and using the Megasquirt relay board, I have a stock GM HEI8 Distributor with R pin on control module to tach on R/B, G pin to R/B ground and I'm going to try B pin straight to vref without a relay to disable timing control and White wire from MSD 6AL to pin s5 .
My jumpers are - D14 to IGN
JS9 to S12C
all 4 IAC

XG1 to XG2 ?
TSEL to OPTDOUT ?
OPTOIN to TACHSELECT ?
Thanks
Matt Cramer
Super MS/Extra'er
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Joined: Thu Apr 16, 2009 8:08 pm

Re: Correct jumpers to use

Post by Matt Cramer »

HEI ignition wiring is covered here:

http://www.msextra.com/doc/pdf/html/MS2 ... 4-109.html
Matt Cramer -1966 Dodge Dart slant six running on MS3X
rickb794
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Posts: 6155
Joined: Sun Dec 21, 2008 10:28 am
Location: Portland OR

Re: Correct jumpers to use

Post by rickb794 »

and MSD wiring is covered here in the manual,

5.3.5 CDI modules (e.g. MSD, Crane etc.)

You can use the HEI as just a source as long as it is locked.
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
ChevelleFan
Master MS/Extra'er
Posts: 786
Joined: Sun May 02, 2004 5:55 pm
Location: Cleveland, Ohio
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Re: Correct jumpers to use

Post by ChevelleFan »

I run a very similar setup. However, I'm wired a little differently. S5 goes to pin E on the HEI8 module. The - wire on the module goes to the white wire of the MSD. I have B tied directly into TPS Vref, same as you describe. Been working reliably for years.

-Dave
'70 Chevelle ZZ383/700r4/3.73 MS3X, 36-1, LS Coils, Holley Stealthram -- success story
'92 Saturn 1.9 DOHC/5sp, MS3, Champcar racer success story
'79 Malibu DartSHP400/80mm/PG/3.55, MS3X/36-1/LS Coils -- success story
Porsche 944 S2 3.0 -- MS3X/36-1/LS Coils, 1:44s Mid-Ohio, Pro Course
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