Comments on: Ducati Diavel Will Debut in Milan: Will Be Fast and Light (Bike Reports) (News)

By: CLB III

CLB III — Wed, 03 Nov 2010 12:07:20 +0000

The Ducatisti effete are upset??????????? I want this bike!!!!

By: puke

puke — Fri, 22 Oct 2010 10:57:44 +0000

Ducati just jumped the shark. Soon I will be embarrassed to ride my monster. Every hollywood hairdresser will have one of those. Just a harley with an i-tie name. yuck

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By: todd

todd — Sun, 17 Oct 2010 16:44:18 +0000

or they can just change the cams to something with less overlap. Bang; instant, low RPM torque.

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By: Tom

Tom — Sun, 17 Oct 2010 10:24:32 +0000

All engines have torque. The reason is that wheel torque at any instant in linearly related to power, and therefore to the product of engine torque and engine rotational speed.

If you are alluding to the performance at low engine speed, it isn’t really any more about torque at low engine speed that about power at low engine speed. Torque has an affinity with low rotational speed at the wheel, but that is due to speed reduction through gearing, and the same affinity does not apply at the engine.

Changes to the engine management software and changes to the exhaust plumbing do not bring about a whole lot of change to engine performance. For the most part, high-performance exhaust systems shift the engine speed at which the engine exhibits its greatest volumetric efficiency and therefore its greatest torque to slightly higher rpm. This increases peak power but the price paid is typically a slight loss in performance at low engine speed. Changes to the engine management software are typically limited in effect to a minimal increase in torque that can be brought about by slightly enriching the fuel mixture. For the most part, in order for an engine to yield good performance, the fuel mixture has to be maintained at the ratio that is referred to by the word “stoichiometric”, which means simply that the quantity of atoms of oxygen is ideal in relation to the quantity of atoms of hydrogen and carbon such that combustion will be complete, with no oxygen, hydrogen or carbon left over. In practice the total number of individual chemical reactions will be slightly greater if the fuel is slightly rich, in which case there will be a small amount of hydrogen and carbon left in the exhaust. But energy is consumed in order to vaporize the fuel, which must occur before combustion occurs, so fuel that if vaporized but that does not get oxidized has the effect of robbing power. The only way it is remotely possible for changing the ECU to accomplish anything is if the manufacturer has set the A/F ratio slightly lean in order to improve mileage and reduce emissions of CO, CO2 and unburned hydrocarbon. The difference in the A/F ratio that will achieve this vs. maximize torque is very small, and the difference in output power between those two A/F ratios is next to nothing, which is why manufacturers usually do the smart thing and set the ratio slightly lean in order to improve mileage.

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By: sreve

sreve — Sat, 16 Oct 2010 11:06:13 +0000

dont cruisers have good low rpm response and torque? cuz that engine seriously sucks until it clears 4500 rpms, unless of course you spend 3k for the ecu and pipe kit

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By: david torquati

david torquati — Sat, 16 Oct 2010 10:31:52 +0000

I own a s4 ducati being a male standing 5′ 1″ my biggest and only complaint is that the bike is to tall. I like going fast , I like riding out of state , and I love going in to turns with my hair on fire . This new bike fits my needs ! Yea it ain’t no 848 , but it is a ducati, and I imagine it can go in to turns way faster then my own ability,

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By: Philip

Philip — Sat, 16 Oct 2010 02:48:28 +0000

Fantastic looking bike! They did an unbelievable job styling it! That’s the coolest Ducati I’ve seen since the old Indiana broke cover! (sorry couldn’t resist) I really do like the look. Way to go Ducati! It would be kinda fun to see a commercial with Rossi and Hayden riding around a dirt track on 2 of those things!

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By: MikeD

MikeD — Fri, 15 Oct 2010 16:04:32 +0000

V-MAX and V-ROD, start ditching the Bacon and Eggs, start munching SpecialK and call Jenny Craig, u’ll need it(i hope so).

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By: Dave

Dave — Thu, 14 Oct 2010 15:14:08 +0000

If they’re after the V-rod/V-max muscle cruiser market I think they’ve nailed it. If it’s also as light as they say it should ride pretty well. Not my preferd style but a really good effort at reaching a market where they don’t currently play.

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By: Dave

Dave — Thu, 14 Oct 2010 13:59:04 +0000

Sure, it’s longer and more raked out than a Duc sportbike. It needs to be different than a Monster/Multi strada. This doesn’t look like a chopper though:

http://www.ducatinewstoday.com/2010/07/more-spy-shots-of-the-ducati-power-cruiser/

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