How come?

[GrayWolf]

Not really. HP and torque are linked with some revs thrown in. And a constant.

More HP, more torque at the rear wheel, simple as that.

Power spread. . . well that's something different.

that's not 'strictly' true, there is a correlation, yes, but many big inch bikes {V twins especially} produce huge torque figures with low HP ones...
FJ1200 I owned, 125hp, around 75ft lbs {that was a grunt monster in it's day}, ZZR1100 I own, around 140-145bhp torque no better than the FJ, and a 'peakier' power delivery.
My current ride CB1300 115bhp, 85ft lbs torque, and low down torque. My MT-01?? 1700cc 95bhp, 120ft lbs (modified bike) doesnt need 'revs' to produce power, and almost 'full torque' available from tickover. however unlike 4cyl's like the ZZR, it runs out of 'puff' in the higher rev range {for the particular motor rev range}

[GrayWolf]

If you think marketing is the only reason someone would buy a harley u might want to pull your head out of your arse

HD oil, Hd underwear, HD jackets, bandana's, hd braces, hd caps, hd wallets, hd boots, hd?????????
nope no marketing going on there, move along please....

[F5 Dave]

that's not 'strictly' true, there is a correlation, yes, but many big inch bikes {V twins especially} produce huge torque figures with low HP ones...
FJ1200 I owned, 125hp, around 75ft lbs {that was a grunt monster in it's day}, ZZR1100 I own, around 140-145bhp torque no better than the FJ, and a 'peakier' power delivery.
My current ride CB1300 115bhp, 85ft lbs torque, and low down torque. My MT-01?? 1700cc 95bhp, 120ft lbs (modified bike) doesnt need 'revs' to produce power, and almost 'full torque' available from tickover. however unlike 4cyl's like the ZZR, it runs out of 'puff' in the higher rev range {for the particular motor rev range}

Hmm, I say it's totally strictly true. You feel the HP increase as you add more throttle. Whether your engine is capable of a large increase at the revs and throttle position is another thing again, but mechanical advantage is a powerful force to be reckoned with.

[J.A.W.]

Hmm, I say it's totally strictly true. You feel the HP increase as you add more throttle. Whether your engine is capable of a large increase at the revs and throttle position is another thing again, but mechanical advantage is a powerful force to be reckoned with.

Dave, why not have a proper look at those dyno charts.. learn what engine characteristics really provide for the ride..

Compare the engines which produce rapidly climbing torque curves.. say the H2.. to the feel of the bike to ride.. it is lively, & naturally, this is a directly related thing..

Then look at the H-D dyno graph which shows a falling torque line, wherein the rpm/hp line barely catches up, before dying in the arse.. classic chugger/tractor feel..

Next, check the flattish torque curve but long rpm ranged Honda 4 graph.. the rpm allows the hp to build, but - its a steady flattish ( bit boring, IMO) feel for the rider too..
The text provides a good comparison of the Ducati V-twin & Z1 inline 4 with torque/rpm performance & gearing outcomes..

[skippa1]

HD oil, Hd underwear, HD jackets, bandana's, hd braces, hd caps, hd wallets, hd boots, hd?????????
nope no marketing going on there, move along please....

You want some of that action dont you

[AllanB]

All this talk of torque (could not resist).

HP - At 50 I always convert modern versions (ps etc) back to old school HP. A hundred of them was once impressive - then 150 (I had a book dedicated to 150 hp motorcycles years back GPZ900 etc etc). 200 or near it is the current horn producing figure for the power mad.

Torque has not enjoyed the same limelight however often what proves a selling point after a test ride - the earlier mentioned Jap fours with relitavely low hp for their litre plus engines but high torque have proven popular - GSX1400, CB1300 and the likes spring to mind.

As a wee side note - go and ride a Factory Screaming Eagle kitted big bore HD. They fair rip. Now just imagine if they decided that was the stock engine configuration.......

Triumph still disappoint in not offering hot-rod Bonnie. The aftermarket easily and reliably gain 80 hp out of these engines and much higher torque figures

[Drew]

All this talk of torque (could not resist).

HP - At 50 I always convert modern versions (ps etc) back to old school HP. A hundred of them was once impressive - then 150 (I had a book dedicated to 150 hp motorcycles years back GPZ900 etc etc). 200 or near it is the current horn producing figure for the power mad.

Torque has not enjoyed the same limelight however often what proves a selling point after a test ride - the earlier mentioned Jap fours with relitavely low hp for their litre plus engines but high torque have proven popular - GSX1400, CB1300 and the likes spring to mind.

As a wee side note - go and ride a Factory Screaming Eagle kitted big bore HD. They fair rip. Now just imagine if they decided that was the stock engine configuration.......

Triumph still disappoint in not offering hot-rod Bonnie. The aftermarket easily and reliably gain 80 hp out of these engines and much higher torque figures

Superduke R then. That torque figure is fucken astounding! 148 foot pounds or summat. Monsters a worked superbike till over half way down the straight.

[J.A.W.]

Triumph still disappoint in not offering hot-rod Bonnie. The aftermarket easily and reliably gain 80 hp out of these engines and much higher torque figures

These lumps are expensive to get a decent power increase from though.. & then the basic chassis feels like the cheap shit that it is..

So that's likely why Triumph doesn't do it.. not worth it, for their market..

I did see a modern Triton though, with a hotted up late Triumph twin lump squeezed into a new Commando chassis ( its very expensive mill had died..)

[Ender EnZed]

Superduke R then. That torque figure is fucken astounding! 148 foot pounds or summat. Monsters a worked superbike till over half way down the straight.

Nm rather than ft lbs but it's still a lot. About the same as an MT01 only it revs twice as high so makes twice the power.

[F5 Dave]

Dave, why not have a proper look at those dyno charts.. learn what engine characteristics really provide for the ride..

Compare the engines which produce rapidly climbing torque curves.. say the H2.. to the feel of the bike to ride.. it is lively, & naturally, this is a directly related thing..

Then look at the H-D dyno graph which shows a falling torque line, wherein the rpm/hp line barely catches up, before dying in the arse.. classic chugger/tractor feel..

Next, check the flattish torque curve but long rpm ranged Honda 4 graph.. the rpm allows the hp to build, but - its a steady flattish ( bit boring, IMO) feel for the rider too..
The text provides a good comparison of the Ducati V-twin & Z1 inline 4 with torque/rpm performance & gearing outcomes..

I have spent a considerable amount of time operating a dyno. I never bother looking at torque curves any more, just a by product IMO.

[J.A.W.]

I have spent a considerable amount of time operating a dyno. I never bother looking at torque curves any more, just a by product IMO.

Nah Dave.. its the other way around.. the hp is the "by-product", a time based mathematical value-construct - artefact - of the torque output..

Guess you don't need to know - how the physical chemistry in the evap' heat-exchange of a fridge works - to open it & get a cold beer out either.. so that's ok..

[F5 Dave]

I'll just leave you here being right.

[J.A.W.]

I'll just leave you here being right.

Thanks Dave, but credit Archimedes, Newton, Watt et al.. not me..

[F5 Dave]

Yeah, well Hitler agrees with me and he'd beat up your guys easily.

[J.A.W.]

HD oil, Hd underwear, HD jackets, bandana's, hd braces, hd caps, hd wallets, hd boots, hd?????????
nope no marketing going on there, move along please....

Sure, there's plenty of lifestyle shit too, if you want it.. so what?

But it aint all there is.. if you've never had a go on a Harley-Davidson, get it organised.. & then maybe you'll have some better informed views..
I like 'em.. for what they are.. I don't want one, 'cept maybe an XR 750 or similar, but I aint got hang-ups about International-Harvesters, ah, I mean, H-Ds..