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Connecting engine's RPM signal to LogWorks?
Am setting up a dual wideband using LC2s and will be datalogging using LogWorks. To better interpret Lambda data I'd like to trace RPM alongside the Lambda. But, I have no idea how to tap into the car's RPM signal. Have an '85 3.2 in an '80 911. Any help with this would be appreciated.
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Karl ~~~ Current: '80 Silver Targa w /'85 3.2. 964 cams, SSI, Dansk 2 in 1 out muf, custom fuel feed with spin on filter Prior: '77 Copper 924. '73 Black 914. '74 White Carrera. '79 Silver, Black, Anthracite 930s. |
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10-12-2024, 05:24 AM
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Join Date: May 2008
Location: Grapevine, TX
Posts: 1,104
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I think you should be able to tap into the tack signal wire on the back of the Tach Black/Violet wire located at terminal #2 on the tach. it originates from the DME computer at pin #21 if that is easer to access with your setup.
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10-12-2024, 01:33 PM
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Join Date: May 2008
Location: Grapevine, TX
Posts: 1,104
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Was just looking at the manual for the LC-2. it looks a bit more complicated to connect than what I expected.
I have the LM-2 and it comes with an analog cable to connect to various signals and a pair dedicated to RPM. Unfortunately the LC-2 doesn't seem to have this option. it appear to me that it is a dedicated O2 controller only and you will need an additional box to accept the RPM signal. in the LC-2 manual they show it paired with either a SSI-4 or LMA-3. |
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10-12-2024, 02:00 PM
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76F... thanks for that. The SSI-4 looks like the solution. ECU is indeed closer.
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Karl ~~~ Current: '80 Silver Targa w /'85 3.2. 964 cams, SSI, Dansk 2 in 1 out muf, custom fuel feed with spin on filter Prior: '77 Copper 924. '73 Black 914. '74 White Carrera. '79 Silver, Black, Anthracite 930s. |
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10-12-2024, 02:26 PM
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1974 Carrera
1979 930
1980 SC Targa
