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| Speed calculation by revs https://www.ausmini.com/forums/viewtopic.php?f=2&t=90891 |
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| Author: | talfox [ Mon Oct 26, 2015 9:03 pm ] |
| Post subject: | Speed calculation by revs |
Good evening Does anyone have the formula to work out speed by revs? I'm trying to work out the speed of 5800 and 6000rpm on 10inch wheel and a 3.44 diff. Thanks |
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| Author: | timmy201 [ Mon Oct 26, 2015 9:10 pm ] |
| Post subject: | Re: Speed calculation by revs |
This one says 99mph at 6000rpm in forth gear http://www.guess-works.com/Tech/ratio.htm |
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| Author: | simon k [ Mon Oct 26, 2015 9:13 pm ] |
| Post subject: | Re: Speed calculation by revs |
154.2 and 159.5 respectively... what you need to do is calculate the rolling circumference of the tyre, then because 4th gear is 1:1 you can multiply that by the diff ratio. I have a spreadsheet that JC shared a few years ago that's very handy PM me an email address and I'll send it |
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| Author: | talfox [ Mon Oct 26, 2015 9:32 pm ] |
| Post subject: | Re: Speed calculation by revs |
Thanks guys. Simon pm'd |
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| Author: | 1071 S [ Mon Oct 26, 2015 9:43 pm ] |
| Post subject: | Re: Speed calculation by revs |
16.4 mph per thousand revs... fine tune for actual wheel rolling radius... Cheers, Ian |
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