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DNHunt |
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914 Wizard? No way. I got too much to learn. ![]() ![]() ![]() ![]() Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 ![]() |
Follow me on this you guys.
My ignition is a Ford EDIS system off of an Escort. (Don't laugh it works) Wasted spark, no dizzy and a 2 coil 4 tower coil pack. The problem is that the 914 tach is triggered off of the negative side of the stock coil and it won't work with the EDIS system. So, I snagged an Escort tach at a pick and pull and I'm going to swap the guts into an extra 914 tach. I just want to verify the connections. It has 3 connectors. Ground and signal in are self explanatory. The 3rd one is labelled B. This has to be switched 12V, right? Thanks Dave |
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fiid |
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Turbo Megasquirted Subaru Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,827 Joined: 7-April 03 From: San Francisco, CA Member No.: 530 Region Association: Northern California ![]() |
The EDIS has two coilpacks and runs wasted spark. The problem is you need to join the noise from 2 coil grounds together into an output signal, without triggering the other coilpack from the one you just fired. You could then feed that signal into an OPamp, or maybe the MSD jobby. I don't know enough about the properties of zeners to know how to set it up right though. I am suprised that you can't use the EDIS module tach output through an MSD tach adapter though.... makes me wonder what that signal actually looks like. |
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