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Title: Rpm per mph calculation Post by: 6L20vt on December 09, 2016, 02:00:47 PM Hello, what is the formula to calculate correct rpm/mph for ecuxplot?
I have info about my gearbox but i dont know calculate the correct number for my car in this units here is the info: 1ª 9,1 2ª 15,4 3ª 22,0 4ª 28,9 5ª 36,6 R 9,8 Kph x 1000rpm. I make my logs in 4° gear usually. Can help me?. Regards Title: Re: Rpm per mph calculation Post by: nyet on December 09, 2016, 02:13:55 PM Get a GPS receiver or just use your phone and a GPS app.
Title: Re: Rpm per mph calculation Post by: 6L20vt on December 09, 2016, 02:21:49 PM I have torque app and obd elm can i make anything with it?What should I measure on my GPS? For example I keep the rpm to 2000 in fourth gear and see how many mph I get? And then divide them by 1000?. Regards
Title: Re: Rpm per mph calculation Post by: nyet on December 09, 2016, 04:37:33 PM No. Just divide rpm by mph.
Title: Re: Rpm per mph calculation Post by: 6L20vt on December 10, 2016, 04:46:28 PM Hello again, I have done what you told me, but I have a doubt, if I do that dovision let's say 4000, it does not give me the same result as if I do the division with the mph I get 5000 for example. What am I doing wrong? Sorry to ask so much but I would like to have well configured ecuxplot. Thank you
Title: Re: Rpm per mph calculation Post by: nyet on December 10, 2016, 04:52:10 PM rpm/mph should be constant for a given gear.
I have no idea what you're asking. How is "4000" a "division"? Title: Re: Rpm per mph calculation Post by: TijnCU on December 11, 2016, 05:01:21 AM Gears are liniar.
Step 1. Drive at 3000rpm Step 2. Check gps for actual speed (in mph) Step 3. Divide 3000 by your actual speed. Result is your rpm per mph in that specific gear. Title: Re: Rpm per mph calculation Post by: 6L20vt on December 11, 2016, 01:33:47 PM Ok, solved, it was a failure in my measurements, thank you very much for your clarifications. a greeting
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