Crash.Net User: Painless

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Painless

July 01, 2014 4:04 AM

MotoGP » Dall'Igna: New engine ‘first step’ for 2015 Ducati


Any shortness achieved by switching to air-bags (they are only pneumatic in the sense that the valve spring has been replaced by an air bag) would be minimal. The desmo system loses almost zero power to operate the valve train as opposed to springs or air bags. Preziosi confirmed that they had not run out of space when testing how far they can move the engine forward. But obviously there is more to it than just shifting the engine forward. One option may be that they are stacking the gearbox cluster more vertically or closer to the crankshaft to make the engine more compact in total length. This would give a lot more freedom with wheelbase and weight distribution.

Painless

July 02, 2014 11:05 AM
Last Edited 74 days ago

MotoGP » Dall'Igna: New engine ‘first step’ for 2015 Ducati


"Everyone knows about this yet fails to admit that 2007 just so happend to be the perfect marriage of bike, rider, tyre, regs, team... . . . . . " Really? I guess that is why Stoner had to battle with his team mate week in and week out. The reality is that Stoner is a top tier rider (one who can win a championship) and he was on a fast pig. The other bikes were too slow at the beginning of the season so Stoner could take the pig easy around the corners and make up for it on the straights. That advantage didn't last very long. At the time there were all sorts of stories about why the Ducati was winning. None of them involved Stoner's ability to ride a pig fast. Now, in hindsight, most of us know better.

Painless

July 01, 2014 8:14 AM

MotoGP » Dall'Igna: New engine ‘first step’ for 2015 Ducati


liltonbeat: It'll be a Honda clone. Took them a long time to work that one out... if you can't beat them... Road-going Ducati V-four with pneumatic valves? They won't be able to sell enough of 'em. It will probably be red.
Oh too funny. So what, you stop every three hours at the garage to re-inflate your 'pneumatic' valve storage tank? Please do a bit of background study on the technology that you wish to comment on.

Painless

June 25, 2014 4:27 PM

MotoGP » Guy Coulon (Tech 3) - Q&A


V4Poweeeer: @Painless ..... I'm assuming your suggesting superchargers as a method of eliminating the need for electronics am I correct??? ...... Now this is the sort of topic I really like engine design :) Superchargers push the power and torque towards the lower end of the rev range.
Yes, the dramatic increase in low end power will increase the tendency to spin/wheelie at low rpm. However when cornering at racetracks the riders keep their engines at the optimum rpm to get back on the power. They aren't chugging around the corners. The supercharged engine will deliver a much smoother power delivery at high rpm than a naturally aspirated version, assuming that you are comparing two engines with similar max power, because the increase in power will be less.. I can see no valid argument against a perfectly linear power delivery and that is what supercharging can deliver.

Painless

June 26, 2014 1:12 AM

MotoGP » Guy Coulon (Tech 3) - Q&A


@V4Poweeeer "Your argument is throw a supercharger on for the sake of throwing a supercharger on." Incorrect. I stated the reasons why and you did not address them. I also provided a link to a dyno chart that shows a perfectly linear power curve. That means the rate of change, or acceleration in horsepower, is fixed at a constant value. This does not ring any bells here. Perhaps it is too technical for some to grasp. Then you continue talking about "shifting power lower". Again completely wrong. Please study the technical information from Rotrex. You can tune the supercharger to match your engine. Of course it is complete stupidity to continue to spin the engine any higher than is necessary, so a lower redline would be far more appropriate than 17000rpm. You don't need to respond to me as I am done.

Painless

June 25, 2014 4:47 PM

MotoGP » Guy Coulon (Tech 3) - Q&A


@V4Poweeeer "I'm assuming your suggesting superchargers as a method of eliminating the need for electronics am I correct???" Yes. That is correct. However, it is not just the electronic rider aids that need to be addressed, but also the huge costs involved in this cycle of ever diminishing returns. In order to push the peak power of these engines higher the peak torque rpm is also lifted higher. So these engines have a violent power delivery. They are simply dangerous. Then after applying electronics needed to tame the savage beasts the manufacturers think "Great now we add back that 10hp that we took away last year". The technology is controlled by the rules. Unfortunately the general public have the misconception that the technology is the best.

Painless

June 25, 2014 8:46 AM

MotoGP » Guy Coulon (Tech 3) - Q&A


@V4Poweeeer Re the supercharger, I disagree. The space is too limited here. However if you search for "Filippo Preziosi Debrief Transcript Today's Test Was About Ducati's Future" you will find my detailed response regarding this and a dyno chart amongst the posts. Re the 500cc with 4 stroke as the only rule: The factories would immediately build engines with forced induction. They would likely use the number of cylinders that yields the best power to weight ratio.


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