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General => Bike Chat => Topic started by: grog on Monday, 06 November 2017, 07:35 PM

Title: torque/pulling power.
Post by: grog on Monday, 06 November 2017, 07:35 PM
reading today, new ducati scrambler 1100. going on about how much torque it has. WTF. 65 ft/ pounds at 4750 revs. 1400 has 93 at same revs. rocket 3 has 147 at 2500. i know its lighter than 14 but who are they kidding. the buyers i guess.
Title: Re: torque/pulling power.
Post by: Speedy1959 on Monday, 06 November 2017, 07:43 PM
My previous bike..
Yamaha MT-01 had just over 110 ft lbs of torque..
But truthfully I prefer Sophie (GSX) by a mile...
Title: Re: torque/pulling power.
Post by: Tony Nitrous on Monday, 06 November 2017, 08:11 PM
"Torque sells trucks,
Horsepower wins races"

:grin:
Title: Re: torque/pulling power.
Post by: Timothy Spencer on Monday, 06 November 2017, 10:21 PM
Without torque, even with 1000bhp a bike would not even move. Its a balancing act.
Title: Re: torque/pulling power.
Post by: T 24 on Monday, 06 November 2017, 11:59 PM
My 14:  109 ft lbs/3000 rpm => 139 ft lbs/7000 rpm => 212 hp/9000 rpm (this was @ 0.7 bar, at the moment max 0.9 bar).
Enough for commuting bike.

Title: Re: torque/pulling power.
Post by: KiwiCol on Tuesday, 07 November 2017, 02:15 AM
Quote from: grog on Monday, 06 November  2017, 07:35 PM
reading today, new ducati scrambler 1100. going on about how much torque it has. WTF. 65 ft/ pounds at 4750 revs. 1400 has 93 at same revs. rocket 3 has 147 at 2500. i know its lighter than 14 but who are they kidding. the buyers i guess.
Be lucky if that Duc could pull the skin off a rice pudding Grog!
Title: Re: torque/pulling power.
Post by: T 24 on Tuesday, 07 November 2017, 05:10 PM
@ Timothy Spencer
To understand that relation between power and torque, there cant be horse power without torque,
because P=F x V  (KW = NM x R/S  / 159.155),  and KW x 1.36 = HP.
Title: Re: torque/pulling power.
Post by: Irish in Oz on Tuesday, 07 November 2017, 07:58 PM
Oh yeah, 1 ft lbs is 1.36 NM.
Title: Re: torque/pulling power.
Post by: Tony Nitrous on Tuesday, 07 November 2017, 08:58 PM
Torque is measured, horsepower is calculated.

HP = (RPM* TRQ)/5252
Title: Re: torque/pulling power.
Post by: Tony Nitrous on Tuesday, 07 November 2017, 09:02 PM
Quote from: Tony Nitrous on Tuesday, 07 November  2017, 08:58 PM
Torque is measured, horsepower is calculated.

HP = (RPM* TRQ)/5252

EDIT: I'm old, I use ftlb and hp, not Nm and Killerwasps or whatever you kids use.
Title: Re: torque/pulling power.
Post by: T 24 on Tuesday, 07 November 2017, 10:21 PM
HP or KW, no matter, both are pulling hard if you have enough of them  :grin:
Title: Re: torque/pulling power.
Post by: Irish in Oz on Wednesday, 08 November 2017, 03:03 AM
KW or HP, ft lbs or NM. 1.36 conversion is common to both.
Title: Re: torque/pulling power.
Post by: VladTepes on Wednesday, 08 November 2017, 01:08 PM

Horsepower is how fast you hit the wall
Torque is how far you take the wall with you....   :lol:
Title: Re: torque/pulling power.
Post by: Speedy1959 on Wednesday, 08 November 2017, 02:14 PM
Quote from: VladTepes on Wednesday, 08 November  2017, 01:08 PM

Horsepower is how fast you hit the wall
Torque is how far you take the wall with you....   :lol:

Well said Vlad !!
:)
Title: Re: torque/pulling power.
Post by: Tony Nitrous on Wednesday, 08 November 2017, 03:33 PM
I've ridden bikes with more horsepower but less torque than the 14.

I've ridden bikes with less horsepower but more torque than the 14.


The high horsepower bikes were a lot more fun !!

Title: Re: torque/pulling power.
Post by: Tony Nitrous on Wednesday, 08 November 2017, 03:35 PM
Quote from: VladTepes on Wednesday, 08 November  2017, 01:08 PM

Horsepower is how fast you hit the wall
Torque is how far you take the wall with you....   :lol:

Sometimes a truck is useful, but I'd normally prefer the Ferrari....  :grin:
Title: Re: torque/pulling power.
Post by: Irish in Oz on Wednesday, 08 November 2017, 04:19 PM
It's Horses for Coarses.
Title: Re: torque/pulling power.
Post by: T 24 on Wednesday, 08 November 2017, 04:46 PM
I`d prefer both, horses and torque.
Title: Re: torque/pulling power.
Post by: VladTepes on Thursday, 18 January 2018, 10:42 AM

Quote from: T 24 on Wednesday, 08 November  2017, 04:46 PM
I`d prefer both, horses and torque.


a torqueing horse?


(https://gsx1400owners.org/forum/proxy.php?request=http%3A%2F%2Flivingstonandevans.com%2Fwp-content%2Fuploads%2F2015%2F12%2FMr-Ed-1.jpg&hash=625ff97aea3739dbfbc4123d21b8327a878ccfc5)
Title: Re: torque/pulling power.
Post by: Batkwaka on Thursday, 18 January 2018, 04:40 PM
Torque is the force applied to the little end bearing by the connecting rod, times the distance travelled which is equal to half the stroke of the motor.
Power is Torque times RPM divided by X (X being a variable depending on HP, KW or other).
Title: Re: torque/pulling power.
Post by: KiwiCol on Thursday, 18 January 2018, 04:45 PM
Bugger that Einstein, I just like to give it a big handful & feel it go!   :drool: :cheers:
Title: Re: torque/pulling power.
Post by: grog on Thursday, 18 January 2018, 07:11 PM
that is so funny Vlad, amazing answer.
Title: Re: torque/pulling power.
Post by: Sweaty on Thursday, 18 January 2018, 07:30 PM
Quote from: Batkwaka on Thursday, 18 January  2018, 04:40 PM
Torque is the force applied to the little end bearing by the connecting rod, times the distance travelled which is equal to half the stroke of the motor.
Power is Torque times RPM divided by X (X being a variable depending on HP, KW or other).
[/quote

gobbledegook I say  :grin:
Title: Re: torque/pulling power.
Post by: Andre on Thursday, 18 January 2018, 08:23 PM
Quote from: Batkwaka on Thursday, 18 January  2018, 04:40 PM
Torque is the force applied to the little end bearing by the connecting rod, times the distance travelled which is equal to half the stroke of the motor.
Power is Torque times RPM divided by X (X being a variable depending on HP, KW or other).

Sounds like torque is closer to the real thing, while power is the wet dream of a mathematician/marketeer to sell engine driven vehicles to those whose world consisted of horse pulled carts and "torque" was not part of their language.

May the Force be with you :boogie:
Title: Re: torque/pulling power.
Post by: grog on Thursday, 18 January 2018, 08:57 PM
This morning i went out front of my house. A lady came past with her horse. Ive now decided horsepower isnt all created equally.
Title: Re: torque/pulling power.
Post by: Andre on Thursday, 18 January 2018, 09:26 PM
Quote from: grog on Thursday, 18 January  2018, 08:57 PM
This morning i went out front of my house. A lady came past with her horse. Ive now decided horsepower isnt all created equally.

That little one just needs to pick up its rpm and than it has the same horse power as one of these giant cold blooded horses. All the theoretical power with barely enough force felt by the rider.
Title: Re: torque/pulling power.
Post by: Batkwaka on Friday, 19 January 2018, 05:54 PM
Quote from: Andre on Thursday, 18 January  2018, 08:23 PM
Quote from: Batkwaka on Thursday, 18 January  2018, 04:40 PM
Torque is the force applied to the little end bearing by the connecting rod, times the distance travelled which is equal to half the stroke of the motor.
Power is Torque times RPM divided by X (X being a variable depending on HP, KW or other).

Sounds like torque is closer to the real thing, while power is the wet dream of a mathematician/marketeer to sell engine driven vehicles to those whose world consisted of horse pulled carts and "torque" was not part of their language.

May the Force be with you :boogie:

Not really, if you consider a single cylinder motor, once the torque stroke has been made there is still energy within the crankshaft raising the piston back to the top, in fact there is more than enough energy to rotate a 4 cycle motor through all four parts of its cycle.
Torque is then applied on top of that remaining energy spinning the crank faster adding more Power to what was already there.
Reality is if Torque were more useful than Power then the 1199cc Ducati's would be untouchable by the 1000cc 4 cylinder bikes, seeing as it produces 20% more torque. It is very difficult and costly to spin the motor up and make the required power which is why nobody bought Ducati Privateer race bikes from 2004 to about 2008 when the emphasymic twin rules were reintroduced at the bequest of Italian sulking.