DATAP R O-45™
components as possible. Make sure that your DATAPRO-45™ main unit and junction box are also as far from any ignition components as possible.
Inputshaft RPM (INP) and Driveshaft RPM (DRV)
If you have purchased the Inputshaft or Driveshaft RPM option, the necessary wiring, hardware and sensor should have been included with your kit.
Verify that the two piece collar (if ordered) fits your pinion shaft. The sensor is passed through the hole in the sensor mounting bracket and is then held in position by the two jam nuts. The sensor should be pointed directly at the outer edge of the collar and toward the center of the rotating shaft. The exact position of the sensor in the bracket should be adjusted to achieve a gap of approximately 1/8" (.125”).
For the input shaft sensor and trigger magnet installation, please get specific details from your transmission supplier or from Computech. The typical sensor gap required for most input shaft installations is approximately .020”. The use of the Computech supplied pick- up magnet is critical for proper operation. Alignment of the magnet and the sensor is also critical to proper operation.
The sensor and cable supplied in the inputshaft and driveshaft kits are interchangeable. For the inputshaft, connect the white wire to junction box position B5 and the black and shield wires to B4. For the driveshaft, connect the white wire to junction box position B6 and the black and shield wires to as B7.
INPUTSHAFT TESTING: Change the LCD display channel to “Inpshft RPM.” Start the engine while the transmission is in neutral, and release the clutch so that the inputshaft safely turns. The LCD display should show the RPM of the inputshaft.
If you are using more than one magnet as your inputshaft trigger, you will need to use your DATAPRO ON-LINE™ software to calibrate the number of pulses per shaft revolution.
DRIVESHAFT TESTING: Testing your driveshaft input could be dangerous. The safest method is to wait until you’re on the track. Nevertheless, it is possible to test this input by putting the car on jack stands. Again, for the sake of safety, it is not recommended that you run the engine in order to turn the driveshaft and tires. Instead, spin the tires by hand as fast as you can while the transmission is in neutral. Change the LCD display channel to “Drvshft RPM.” The driveshaft should turn fast enough to get a very small reading.
Copyright 1999 Computech Systems Inc