remski2 Posted January 14, 2020 Report Share Posted January 14, 2020 Hi. Is there a way to manually calculate the Gear Ratio Table from logged data ? As I am street tuning the car by myself. I've read that "Gear Ratio = Engine Speed (RPM) / Speed sensor frequency (Hz)". Is that correct ? and if so which value is used.. as the frequency has a range in perticular gear. Thank you Remi Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 14, 2020 Report Share Posted January 14, 2020 You can log RPM and the DI frequency and pick a point in your log where you know what gear it was is and just divide one by the other and enter the result in your table. Im not at home to test but I had a vague recollection that the gear ratio number was actually RPM/KMH so it might pay to log speed as well try that if RPM/Frequency didnt work. The other option is just to jack the wheels up of the ground and do the quick auto gear calibration on the spot. Quote Link to comment Share on other sites More sharing options...
remski2 Posted January 14, 2020 Author Report Share Posted January 14, 2020 Thanks.. Will give it a shot. Quote Link to comment Share on other sites More sharing options...
remski2 Posted January 21, 2020 Author Report Share Posted January 21, 2020 Hi. I've used RPM/kmh and it worked. There is also a "Gear Ratio Calc. (RPM/kmh)" log variable that will give you all your gear points without pulling out a calculator. Thank you. Remi Quote Link to comment Share on other sites More sharing options...
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