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Rb25 speedo specs for driveshaft sensor input

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Just thought I'd ask if anyone has worked this out.

I would like to use the rb25 speedo signal for a driveshaft input to haltech nexus. I use the 20 tooth red cog on the speedo drive and its directly connected to an spi input on the nexus. Even the the cog has 20th... this does not necessarily mean the signal will be 20 pluses per revolution.

Does anyone know how many pusles per revolution the rb25 5speed speedo drive is.

Thanks in advance

im not sure on the number of pulses per revolution but there is 123 pulses over 100 meters in most nissans with std wheels etc

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