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| Working out RPM? https://www.ausmini.com/forums/viewtopic.php?f=2&t=77864 |
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| Author: | mattsmadmini [ Wed Aug 01, 2012 12:51 pm ] |
| Post subject: | Working out RPM? |
Does anyone have a good calculator application/powerpoint doc to work out rpm? Here is the figures: 50.1hp @110km/h 3rd gear, 3.76 diff, 10" wheels... There used to be a good one on the moke website, that has since disappeared... |
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| Author: | drmini in aust [ Wed Aug 01, 2012 1:18 pm ] |
| Post subject: | |
I think Simon K mentioned one on here recently. It would be nice if that damned dyno gave rpm on the X axis not KMH, wouldn't it. 
[edit] your 3rd gear is 1.43:1, so with a 3.76 diff, MPH/1000 = 14.7/1.43 = 10.28 MPH/1000 in 3rd. or 16.65 KMH/1000. so 110KMH = 6,600rpm approx. |
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| Author: | sgc [ Wed Aug 01, 2012 1:27 pm ] |
| Post subject: | |
I put this spreadsheet together ages ago, might be what you need... [edit] Plugging your values into it (using Cooper 'S' gear ratios - 3rd being 1.357:1) gives 6130rpm in third at 110km/h. [edit 2] Doc beat me, it's a little-wheeler Moke... then yes, 3rd is 1.430:1 but I get 6460 RPM at 110km/h. |
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| Author: | mattsmadmini [ Wed Aug 01, 2012 1:34 pm ] |
| Post subject: | |
Thanks guys |
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| Author: | MINImal effort [ Wed Aug 01, 2012 2:24 pm ] |
| Post subject: | |
I Ilke the one on the "Guessworks" site.... It has options for the majority of gearbox permutations .... http://www.guess-works.com/Tech/ratio.htm (I'm sure it used to have a kph option but seems only to be mph these days) |
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| Author: | drmini in aust [ Wed Aug 01, 2012 3:35 pm ] |
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sgc wrote: I put this spreadsheet together ages ago, might be what you need...
[edit] Plugging your values into it (using Cooper 'S' gear ratios - 3rd being 1.357:1) gives 6130rpm in third at 110km/h. [edit 2] Doc beat me, it's a little-wheeler Moke... then yes, 3rd is 1.430:1 but I get 6460 RPM at 110km/h. It's got an Oz rodchange box in it but with the std, non-S ratios. same ratios as Mini K. |
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