Testastretta Engine History Question - 2013 Touring S - Ducati.ms - The Ultimate Ducati Forum
 
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post #1 of 8 (permalink) Old Jun 8th, 2013, 10:55 am Thread Starter
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Testastretta Engine History Question - 2013 Touring S

Anything anybody can tell me about the history of this L-Twin cylinder, 4 valve per cylinder, Desmodromic, Dual Spark, liquid cooled engine design would be appreciated.

Like what is “Testastretta”? And what is Desmodromic. And what other bikes has Ducati used this or a similar engine in?

Thanks!

cls
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post #2 of 8 (permalink) Old Jun 8th, 2013, 11:25 am
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lots and lots available on the web for you to read....wikipedia does a pretty good job of providing information on the words you've asked about. also of help is the Ducati website, and specifically the area devoted to the Multistrada, definitely worth visiting. beyond that there are books on the history of Ducati that might interest you.

have fun,

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post #3 of 8 (permalink) Old Jun 8th, 2013, 11:26 am
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Originally Posted by Switchblade_327 View Post
Anything anybody can tell me about the history of this L-Twin cylinder, 4 valve per cylinder, Desmodromic, Dual Spark, liquid cooled engine design would be appreciated.

Like what is “Testastretta”? And what is Desmodromic. And what other bikes has Ducati used this or a similar engine in?

Thanks!

cls
Stand by, you're about to be bombarded with responses....
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post #4 of 8 (permalink) Old Jun 8th, 2013, 11:33 am
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Testastretta ('Narrow Head')

A (Desmodromic) valve is a reciprocating engine valve that is positively closed by a cam and leverage system, rather than by a more conventional spring.

google is your friend
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post #5 of 8 (permalink) Old Jun 8th, 2013, 11:39 am
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Stand by, you're about to be bombarded with responses....
i'm starting to wonder if that is what this poster is after

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post #6 of 8 (permalink) Old Jun 8th, 2013, 12:33 pm
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i'm starting to wonder if that is what this poster is after
Jfusara has given the short ansers, and desmodronic actuation is easy to explain; no valve springs, positive, mechanically coupled valve actuation both opening and closing. A complete answer in respect to what Testastretta means, while it has been covered already, is really a longer explanation because it's as much a function of history and knowing what came before as it is of defining the term as "narrow head."

Briefly, the Testastretta evolution was introduced in the early part of this century as the motive force behind the last generation of the much admired 996 family, specifically in the 996R. As Obie says, Google is your friend since the evolution of Ducati Desmoquatro (4 valve, water cooled) motors is pretty constant and each new package tends to build upon the last model's strengths. The motor we see today in the Diablo, Street Fighters and Multistrada variants was the last generation's superbike power plant.

The new short stroke motor in the Panigale is a somewhat (some people might say "very") different beast due to its exceptionally short stroke character but I'm going to guess that the Testastretta will probably be with us for some time in the "cooking" versions of Ducati's higher end street offerings due to its broad torque characteristics and its ability to be tuned (or detuned, if you will) to a variety of applications.

When you ride a Testastretta 11 degree equipped bike, you ride with a "narrow included valve angle" version of the last generation of Ducati's prior superbikes beneath you. Tradition in motion, one of the world's great twins.

Lew
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post #7 of 8 (permalink) Old Jun 8th, 2013, 12:59 pm Thread Starter
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THANK you Pampero! Exactly the type of reply I was hopping for...

cls
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post #8 of 8 (permalink) Old Jun 8th, 2013, 2:36 pm
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I stand to be corrected, but let me take a shot...

The Testa was an evolution from the Desmoquattro engine design that includes a deep sump oil reservoir, and better access to valves design, and larger valve area (? speculative).

The Desmoquattro's are 916 cc (others ??), whilst the Testa engines had displacements of 998, 1098, 1198 (probably some others).

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