Lumpen Poison Fish. Poison Fish. TASTY FISH!!! Donating Members 5,181 Member For: 22y 1m 15d Gender: Male Location: The Bogan Shire Posted 21/03/03 01:32 AM Share Posted 21/03/03 01:32 AM I am wondering how you work out Torque if you're given HP and revs and vice-versa,it was in a motor of mine a while back but I lost the bugger, from memory it was something like:Horsepower over Revs x Something to do with a circle = torque...no seriously!I was just wondering if any engineering type fellas or Fact Nerds :idea: actually know what the formula is! Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/ Share on other sites More sharing options...
aniken I don't suffer from insanity; I enjoy every minute of it Donating Members 4,316 Member For: 22y 4m 10d Gender: Male Location: Sydney, south west Posted 21/03/03 02:18 AM Share Posted 21/03/03 02:18 AM (edited) I'm not an enginner, but its a slow day at work today . I found the attached conversion chart on the net. You use a ruler to line up the 2 values you do know (eg, rpm and horsepower) and it tells you the other value (torque). Someone who is more mechanically minded than me may have something betteror check out How stuff works Edited 21/03/03 02:23 AM by aniken Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14211 Share on other sites More sharing options...
svtang Member 40 Member For: 22y 1m 25d Location: Melbourne Posted 21/03/03 02:31 AM Share Posted 21/03/03 02:31 AM at any rpm ... the torque (in nm) is the kW at that rpm times the 9549 (or 9459??? I can't exactly remember as I'm only a halfbreed nerd) then divided by that rpm so 240kw at 5250rpm .....240x9549/5250= 436nmscratching my head Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14214 Share on other sites More sharing options...
rjs Donating Members 525 Member For: 22y 4m 4d Location: Sydney Posted 21/03/03 03:10 AM Share Posted 21/03/03 03:10 AM Damn I actually got the calcs at home. Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14222 Share on other sites More sharing options...
Raptor Member 66 Member For: 22y 6m 19d Posted 21/03/03 04:55 AM Share Posted 21/03/03 04:55 AM Power(watts) = Torque (Nm) x revs (radians/second)Lets see if I can work this through;1 revolution = 2xPi (Pi=3.142 etc), thereforeRPM = 2x3.142/60 (rads/sec) = 0.104733333Power (kW) = Torque (Nm) x RPM x 0.1047333/1000ORPower (kW) = Torque (Nm) x RPM / 9548andTorque (Nm) = Power (kW) x 9548 / RPMQED! (Yes, I did do an engineering degree back in the mid 80's. Amazing what stays in the memory) Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14231 Share on other sites More sharing options...
Guest Mr Walker Guests Posted 21/03/03 06:25 AM Share Posted 21/03/03 06:25 AM Raptor,I thought you'd be talking Hp back then not kw! Just to remind me, is the conversion for imperial measurement;Power (Hp) = Torque (ftlb) (or whatever the abbreviation is) x 5250 / rpm? Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14238 Share on other sites More sharing options...
Lumpen Poison Fish. Poison Fish. TASTY FISH!!! Donating Members 5,181 Member For: 22y 1m 15d Gender: Male Location: The Bogan Shire Posted 21/03/03 07:28 AM Author Share Posted 21/03/03 07:28 AM theres actually two different formulas aren't there one relating to HP and ft/lbs and another one for Kw and Nm's.I remember that HP and Ft/Lbs are the same at 6000 odd revs and Kw/Nms are the same at the 9548Rpm.And I knew it had something to do with a circle. Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14240 Share on other sites More sharing options...
Raptor Member 66 Member For: 22y 6m 19d Posted 22/03/03 07:05 AM Share Posted 22/03/03 07:05 AM Mr Walker said: Raptor,I thought you'd be talking Hp back then not kw! Gimme a break, the country has been metric for longer than that.Still HP and mpg means as much to me as kW and l/100kms.5250 seems to ring some bells but I never could make much sense of imperial conversions and I don't have any reference books handy.Yes XFwannaBA. It has something to do with that circle thing (Pi). Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14314 Share on other sites More sharing options...
Lumpen Poison Fish. Poison Fish. TASTY FISH!!! Donating Members 5,181 Member For: 22y 1m 15d Gender: Male Location: The Bogan Shire Posted 22/03/03 12:47 PM Author Share Posted 22/03/03 12:47 PM and heres me thinking all those greek guys were just working out new recipies... Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14347 Share on other sites More sharing options...
rjs Donating Members 525 Member For: 22y 4m 4d Location: Sydney Posted 22/03/03 11:43 PM Share Posted 22/03/03 11:43 PM Link to comment https://www.fordxr6turbo.com/forum/topic/1377-how-to-calculate-torque-and-power/#findComment-14362 Share on other sites More sharing options...
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