Mulsanne's Corner NEWS

Mulsanne's Corner NEWS isn't meant to be THE source for up to date news items.  Instead what we are doing is providing an archive for information collected through out the Net related to new car developments.  Occasionally we do post first hand gathered items, but most of the time it is news from secondary sources such as dailysportscar.com or Autosport.  We will provide all sources for any news item shown here.

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Aerodynamacist and automotive enthusiast Paul T. Glessner presents "The Secrets & Basics of Vehicle Aerodynamics" Seminars.  See why more cars are going faster and doing it more safely and in style.  Paul has been asked to speak at venues like Bob Bondurant SoHPD, SAE, SEMA and PRI.  Paul's seminars both educate and entertain.  The day long seminar can be held at your club, organization and/or company location with the organizer paying only $100.  Click on the above banner (click event date in site) to read about Paul's extensive background and testimonials from enthusiasts like Jay Leno.
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"While I am not an engineer or a major technical type, I enjoy the discipline of aerodynamics and was pleased at how Paul was able to explain its intricacies to individuals like me." - Jay Leno, Tonight Show Host

 

October 2005
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10.26.05

>>Lee Stohr has been busy winning the DSR National Title.  Mark Jaremko took the Stohr WF1 to the National Title at the SCCA Run-offs and in the mean time destroyed the Mid-Ohio qualifying time by 2 seconds even lapping faster than all the CSRs!  The WF1's aerodynamics are the responsibility of Wayne Felch (above left--Lee Stohr Middle, Mark Jaremko right).  Development consisted of full scale pressure mapping and the work centered on developing a new front splitter, rear tunnels, and rear wing.  Bodywork patterns and molds were then made in-house and  Composites Unlimited was contracted to manufacture the bodywork from pre-preg composites.

The WF1's chassis is a combination steel tube frame and carbon fiber with the front and rear clips being steel in order to facilitate easy repair.
Loynings Engine Service 1000 cc Yamaha develops 185 hp!
10.24.05

>>A couple of house keeping items here.  I've received two requests for helps for various items/information over the weekend, read these and see if you can lend a hand.  Thanks!

Mike,

I'm wondering if you can put out the word and help me find a wide-span main rear sportscar element that I can buy for a few hundred dollars?  Old/obsolete is fine (something within the past 10-15 years, preferably); I need bags of rear downforce for very little $--this is a personal project, not a pro effort... I'm hoping you know of a sportscar person with an element (or two) collecting dust somewhere...

This is for a sedan that I've built to World Challenge GT specs, and will be competing in the NASA 25 hrs of Thunderhill near Sacramento.  As the race is both 25hrs long, filled with 80 cars (all likely slower), and it often rains for most of the race, an overabundance of downforce will actually be a blessing when dealing with rain and traffic.  I've incorporated both a very deep splitter, Reynard CART upper FWing elements, and long flat bottom floor up front, and need to balance it with similar high levels of rear downforce.

I've called in a bunch of friends that have volunteered to drive--Memo Gidley, Scott Bradley, Chip Herr, and the Editor of Car & Driver--the faster and more striking the car looks and performs, the better. If you know of anyone that'd take pity on me and ship out a stout rear element (and/or matching 2nd element if possible) to use, I'd greatly appreciate your help asking around.  Again, I have a few hundred bucks I can offer, but that's about it.  I'm hoping our Mulsanne's community can help with a homegrown project here!

NOTE: the car tests on Nov. 7th for the first time, and the day will be used for both a shakedown and a wealth of setup work; I need the rear wing in place for the test, so having something in my hands in CA by the first few days of November is necessary.  Because I don't know what I'll be getting, or what fab work I'll need to do (end plates, mount plates...), the earlier, the better.

Respectfully,

Marshall Pruett
Marshall Pruett Motorsports Engineering
www.racedataengineering.com
mpme_rdaATmsn.com

WANTED, further information regarding the radio / mobile phone holders fitted to either of the two 2001 Le Mans 24 Hours MG XPower team entered MG Lola EX257s - Nº 33 of Mark Blundell, Julian Bailey and Kevin McGarrity or Nº 34 of Anthony Reid, Warren Hughes and Jonny Kane. Information required would hopefully be detailed interior photographs of the cockpit area showing either of them in situ - apparently they were velcroed onto the shoulder wing of the driver's seat. Do you know any photographer or team member that took detailed photographs of this area? Were they different for the 2002 race? Do you know what sort of radio / mobile phone each of the cars carried during the race? Did any of the drivers have call to use their radios / mobile phones during the race, i.e. did they break down at the back of the circuit at some point? Any help would be gratefully appreciated. Kind regards and best wishes, David Sims - can be contacted on: 

david.sims947ATntlworld.com

10.19.05

>>File this under spurious rumor for now (though note where you heard it!).  But it is with enough detail and from a reliable source that I felt justified in publishing it as there is a large information void regarding the subject of the new Audi LMP car.  Word is that the car will be diesel V12 powered.  It is no secret that Audi is coming back with a new car that will be diesel powered.  But up until now all talk had centered around a V10 turbo diesel.  My source, who knows better than I, indicates that a move to a V12, "reveals that they are after the maximum allowed volume and/or the highest possible revs in the diesel."  Simplified, diesels generate power by increasing boost pressure or throwing more fuel into the cylinder.  Both of these methods increase the likelihood that the head will separate from the block and aren't necessarily conducive to endurance racing reliability.  A V12 will allow for more revs which, while not eliminating reliability issues, moves the stress on the engine from the head bolts to elsewhere (the cylinder heads will be under enough stress as it is!). 

And while we're at it, why diesels anyway?  Again, simplified, with the regulations pegging engine power to around 650 via the engine inlet restrictor, few gains (if any can) be found in trying to increase absolute horsepower; the inlet restrictor is very effective and works by simply limiting the amount of air that can be brought into the engine and therefore the absolute power.  So engine performance gains are found by improving engine drivability, fuel efficiency, and torque, all the areas low in the rev. range where the inlet restrictor can't effect.  This is one of the reasons Audi introduced the FSI engine (direct injection) as it showed gains in drivability and fuel efficiency.  While a racing diesel engine does have its challenges and compromises (weight and a premium on intercooling efficiency which potentially effects aerodynamics), the benefits are massive amounts of torque (750+ lb-ft vs. 500) and increased fuel economy.  It is predicted that with a similar fuel tank size (to a gasoline powered LMP1 engine), a diesel will be able to run 2-4 laps longer at Le Mans.  So the performance gains are worth any engineering headaches.

10.4.05

>>The Petit Le Mans updates will be along shortly.  In the mean time, Dave Lynn sends us this image of the completed Mazda RX-792P (seems he finally got around to liverying the car on Friday night...sheesh).  The car (chassis no. GTP001) has been in Jim Downing's shop for the past few months undergoing a full restoration in anticipation of the Seven Stock Mazda meet.  The car was dropped off at Jim's at the same time Dennis Spencer took delivery of his two RX-792Ps (chassis GTP003 and a showcar [mid-page here]).  Bob Chapman and I were able to photograph GTP001 in detail, courtesy of Jim Downing, the Tuesday evening before Petit.

The day we arrived the car had unexpectedly been disassembled in order to chase a clutch problem.  Though this offered a unique opportunity to detail certain aspects of the car's design typically not accessible.  Our images from that day will be posted at some point.
Jaguar XJR-14And in case you're keeping score at home, we've also had the opportunity to photograph these cars (in the detail you'd expect) and will be featuring them at some point in the future (near or far):
Nissan R90C
Lola T92/10
Intrepid GTPSo if you're ever wondering what we're working...well, this is a close to a working list as there is.
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©Copyright 2005, Michael J. Fuller