Wonderful thread. I have nearly finished my mTDI AFN-based build. For monthts my brain has worked on the problem: how to use the nicely built in vw sensor. Biased more to mechanics than electronics I knew that filling two gaps on the sensorwheel with steel would do the job. Not nice work wih an assembled engine! I knew that a divider by two would do the jobb. This and a device to protect it from spikes is all I knew on the electronicall side of it, so now I look forward to Smokey Eddys solution. The vw sensor (G28) has three terminals.1 and 2 is the coil and I guess 3 is grounding the capsule. I connected 1 and 2 to a volvo/yazaki gasser tacho and tested it on my lathe and it showed correct and stabel rpm.Bo Gunnar
still working perfectly!!!!
Quote from: jimbote on March 31, 2009, 09:10:20 amstill working perfectly!!!!Good to know! I have a question- since you are using two nuts 180 degrees out on the crank, it would be feasible then if you were driving the tach with the intermediate shaft or camshaft pulley that you would use 4 "pickups" instead of two, since it turns at half the speed?Brendan
IF the signal from the W terminal will drive a modified gas tach!