jarrod83 Posted October 31, 2010 Share Posted October 31, 2010 the speeds in mph, liking the 900Nm of torque by 2500 Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5525339 Share on other sites More sharing options...
ARTZ Posted November 1, 2010 Share Posted November 1, 2010 this is where its @engine dynod first then into the shop on the dynapack.... no bullshit "roller derived tractive effort" figures... just look at the torque (cold hard real torque).... i can tell you now nothing compares to driving something with this much horsepower and torque... and this is a daily driver, that returns 10-14l/100km So what you trying to say here is the engine dyno gave the same results as the dynapack? Or are you just flexing your e-wang ya show off...... Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5526620 Share on other sites More sharing options...
PM-R33 Posted November 1, 2010 Share Posted November 1, 2010 I still want to know what car it is! Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5527174 Share on other sites More sharing options...
ARTZ Posted November 1, 2010 Share Posted November 1, 2010 ill put 10$ on toyota Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5527205 Share on other sites More sharing options...
Harey Posted November 9, 2010 Share Posted November 9, 2010 Ok so assuming a 1000rpm drop of changing up gears, when would you change gears on this monster car? If your about torque then I would predict just above 5,000rpm and if your about power then around 6,500rpm. Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5539926 Share on other sites More sharing options...
Rolls Posted November 9, 2010 Share Posted November 9, 2010 Ok so assuming a 1000rpm drop of changing up gears, when would you change gears on this monster car?If your about torque then I would predict just above 5,000rpm and if your about power then around 6,500rpm. Well if you thought that torque was the key to a fast car you would shift to maintain max average torque over the rpm range, and do the same for horsepower, obviously shifting to maximise max horsepower over the rev range makes a car faster, not peak torque. Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5540027 Share on other sites More sharing options...
Harey Posted November 9, 2010 Share Posted November 9, 2010 You must read this thread: http://www.allpar.com/eek/hp-vs-torque.html I think that solves all the issues. Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5540443 Share on other sites More sharing options...
Rolls Posted November 9, 2010 Share Posted November 9, 2010 (edited) You must read this thread: http://www.allpar.com/eek/hp-vs-torque.htmlI think that solves all the issues. we have already come to a conclusion and I believe everyone is happy they understand it, to maximise performance you want to shift at peak power and keep peak power under the curve, not peak torque under the curve, are you saying this is incorrect? edit: that link says the same thing, so I'm assuming you are in agreeable with everyone? Edited November 9, 2010 by Rolls Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5540462 Share on other sites More sharing options...
Harey Posted November 9, 2010 Share Posted November 9, 2010 we have already come to a conclusion and I believe everyone is happy they understand it, to maximise performance you want to shift at peak power and keep peak power under the curve, not peak torque under the curve, are you saying this is incorrect?edit: that link says the same thing, so I'm assuming you are in agreeable with everyone? Yup I am agreeing. I just think its a really good comprehensive explanation of it. Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5540471 Share on other sites More sharing options...
Rolls Posted November 9, 2010 Share Posted November 9, 2010 Yup I am agreeing. I just think its a really good comprehensive explanation of it. it really is, good find. Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5540474 Share on other sites More sharing options...
jarrod83 Posted November 19, 2010 Share Posted November 19, 2010 That was an awesome explanation of the problem.. its funny how he summed up so many points me n rolls covered.. with the whole cvt etc, and this bit "Hmmm... P = F * V ...rearrange to get F = P / V ... that means that you get the maximum force pushing the car if you maximize your *Power* at any given velocity. This gives us another useful rule: Shift to maximize engine POWER, not engine torque!" funnily enough i had to use all these formulas for my exam today, except i had to calculate the maximum power i could get a car to produce at 80kmph and the equivalent engine rpm with different gears and the diff, subtract the drag power loses, then calculate the maximum hill gradient the 1800kg car could cruise up, P=mg sin(hill angle) * velocity ftw Link to comment https://www.sau.com.au/forums/topic/341559-is-power-rwkw-figure-everything-why-are-people-so-hung-up-on-kw-figures/page/13/#findComment-5557295 Share on other sites More sharing options...
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