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Join Date: Nov 2005
Location: Granite Falls, WA
Posts: 90
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Megasquirt Tach Wiring
Hi, does anybody know of a proven way to power the tach in a '80 SC from a ms II? I found some generic diagrams but it seems like a lot of guess work.
Thanks
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'80 911SC R.O.W. Grand Prix White '88 325iX Diamantschwarz-Metallic |
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03-18-2011, 04:29 AM
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What ignition setup are you running with your MS build?
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Steve Sapere aude 1983 3.4L 911SC turbo. Sold |
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03-18-2011, 07:14 AM
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Location: Granite Falls, WA
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I'm running ms extra with vw 1.8t cop coils in wasted spark format.
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'80 911SC R.O.W. Grand Prix White '88 325iX Diamantschwarz-Metallic |
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03-19-2011, 02:02 AM
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I am running my tach from MS3X with the Tacho output which is a switching +12V signal (square wave) similar to the EDIS signal that works well with the OEM tach. You should be able to build that circuit (connect to JS0, JS2. JS10, JS11, D14, D15, D16, or FIdle pin) with your MS2extra like this:
 MS2-Extra Hardware Manual
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Steve Sapere aude 1983 3.4L 911SC turbo. Sold |
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03-19-2011, 07:53 AM
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If you upgrade to MS 2 V3.57 or above you will just have jumpers and wont need to do any soldering on your board.
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83 SC Targa -- 3.2SS, GT2-108 Dougherty Cams, 9.5:1 JE Pistons, Supertec Studs, PMO ITB's, MS2 EFI, SSI's, Recurved Dizzy, MSD, Backdated Dansk Sport Stainless 2 in 1 out, Elephant Polybronze, Turbo Tie Rods, Bilstein HD's, Hollow 21-27 TBs, Optima Redtop 34R, Griffiths-ZIMS AC, Seine Shifter, Elephant Racing Oil Cooling. |
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03-19-2011, 08:05 AM
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Thanks, thats just what I needed to know.
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'80 911SC R.O.W. Grand Prix White '88 325iX Diamantschwarz-Metallic |
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03-19-2011, 02:36 PM
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Ancient thread I know, but
I'm doing a FrankenCIS installation on my 86 930 and want to drive the tach from the microsquirt. Did this circuit work? What resistor values are needed? Thanks |
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12-11-2016, 10:46 AM
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umop apisdn
Join Date: Jun 2014
Location: Brisbane, Australia
Posts: 640
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the microsquirt has the tach drive circuit built in and matches the one above
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Steve 1981 928S 4.7 ROW with KE3-Jetronic "Be the man your dog thinks you are." www.FrankenCIS.com |
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12-11-2016, 03:19 PM
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1983 Porsche 911SC
