kaptainballistik Posted August 25, 2022 Report Share Posted August 25, 2022 Evenin all. probably a left field question... but Whats a good target pulse per wheel revolution for reasonably accurate speedo triggering at lower speeds? I'm currently running 5 pulses per Revolution (Trigger on the Inner driveshaft flange) but I'm wondering if going for 10 per revolution. (Grind some teeth off the driveshaft ABS ring... )would give me a bit better resolution at 10-15 KPH (when launch control is active...) From calculations I think a speedo drive of an unmodified subaru ABS ring would be over the Links speedo HZ rate at 130kph...Ish. Happy to be corrected!! Quote Link to comment Share on other sites More sharing options...
Confused Posted August 25, 2022 Report Share Posted August 25, 2022 The G4X supports 10kHz on its inputs, so you can just use the ABS sensors as they are. It's only the G4+, with its slower processor, which can struggle with input frequency when the processor is very busy (8 cylinders, fully sequential fuel & ignition, 4x VVT etc) kaptainballistik 1 Quote Link to comment Share on other sites More sharing options...
kaptainballistik Posted August 25, 2022 Author Report Share Posted August 25, 2022 well, that makes it easy! Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 25, 2022 Report Share Posted August 25, 2022 Even with only 5 teeth you are getting a speed update every 1/5 of a wheel rotation. Thats only a distance of about 450mm of road surface, so probably adequate for most. Quote Link to comment Share on other sites More sharing options...
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