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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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lapuwali |
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#2
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Not another one! ![]() ![]() ![]() ![]() Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 ![]() ![]() |
I seem to remember from discussions here and the MS board that some tachs (and I think the early 911 and early 914 tachs are like this) depend on the spiky, noisy tach signal. The signal is something like 30-50V peak to peak. A later 914 tach ('75?) will swallow a clean 12V square wave. Instead of Zeners, you might try running the EDIS tach signal into an op-amp or a transistor and amplify it.
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