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Here is the press release on the historic first victory of the MantisSport Cayman S race car. Sorry for the delay in posting but we have been busy preparing for Watkins Glen on June 10th and 11th. There is a very large field for this event and we know we will have to be well prepared to repeat our performance of Mid-Ohio. We tested at Mosport again last weekend and Ernie was very pleased with the car. I will keep you posted of our results.
Stan Carmichael
MantisSport
May 18, 2006
MantisSport Makes History With New Porsche Cayman S
The long journey began only four months ago. January 14th 2006 preparation began in the Mantis Automotive shop to turn a new Porsche Cayman S into a Porsche Club of America stock class racecar. On May 13th 2006 it earned its first PCA Club Racing “D” class victory at Mid-Ohio Sports Car Course in Lexington Ohio. This is the first race-win for a Porsche Cayman S.
“We had two goals when we started”, claims driver/owner Ernie Jakubowski, “ to be the first to race the new Porsche and to be the first to win in the new Porsche”. Jakubowski, owner of Mantis Automotive in Oakville Ontario, met his first goal on February 10th 2006 at Sebring in Florida. The second was not so easy for the six-time National Off-Road Champion and two-time Targa Newfoundland Modern Class winner.
Race stops at Road Atlanta, Georgia in March and Lime Rock, Connecticut in April, proved gains in the development of the new car. After an encouraging 2nd place finish at Lime Rock, the MantisSport team further refined the car on the road course at Mosport International Raceway the weekend prior to the Mid-Ohio event, in hope of clenching those elusive last seconds of lap time.
“We had to get the car in balance, so Ernie felt comfortable driving it to the limits. Then Ernie had to get comfortable driving it at the limit.” Stated crew chief and co-builder Stan Carmichael. “This takes time, lots of time, and we had no real idea where to start. We have come a long way since January.” Being a new model, based on the Boxster, but with many refinements, the MantisSport team had to start with a clean sheet of paper. No one had raced this car before; there was no data or parts available to them. They had to rely on experience and gut instincts to prepare this car for road racing.
“I wanted a new challenge,” says Jakubowski, “I wanted to try something that was new and original. Making the new Cayman S into a racecar seemed to fit that definition of challenge.” With help from sponsor's Pfaff Porsche and Mobil 1, as well as friends and fellow Porsche Club members, that initial challenge has now been met. So what is next for the MantisSport team?
This summer they will compete in two more Porsche club races, Watkins Glen, New York in June and their home race at Mosport in July. Then they have to focus on defending at Targa Newfoundland in September. “We would like to take the Cayman S to Newfoundland, I think we can be competitive in this car and MantisSport has always done well at Targa,” says Jakubowski. Their season will end in October at Daytona International Speedway for the inaugural PCA club race at the site of the famed 24 hr. race.
The Porsche Club of America - http://www.pca.org
CaymanClub.Net members who are also PCA members should request access to the PCA Member only forum by filling in their PCA Member ID# into their profile and then requesting a group membership addition, both of which can be done in the User Control Panel (User CP)
Jim Ellis Porsche
Porsche.... The driving experience is utterly unlike any other. When it comes to the finest in workmanship, technology, and exclusivity, there is no competition. Along with our certified sales professionals, we have the most highly trained service technicians in the industry. Most importantly, after 24 years with Porsche, we have a long history of customer loyalty and commitment to customer care that sets us apart from the crowd. We relish selling and servicing one of the most desired brand names in North America, Porsche. We welcome you and we hope you enjoy your visit - virtual or preferably, in person! We look forward to seeing you.
Any recommendations on how I can improve my tire wear on the track and further decrease my lap times? I seem to have some understeer at/near the limits.
Understeer at or near the limits is a good thing in reasonable doses of course. Understeer is a self correcting imbalance, oversteer requires quick hands and feet and can be slower in most cases.
If you are experiencing slight understeer on corner entry be patient, reduce throttle until you have the apex and then apply more throttle to exit. Slight understeer on exit requires a more progressive application of throttle or perhaps a later apex.
Extreme understeer on entrance is just too much speed on entry and probably too late and/or too agressive turn-in. Extreme understeer on exit usually is a sign of over agressive throttle and a too early apex. Remember slow in = fast out...
Most cars will understeer to some extent unless they are race cars and then they will be set up for mild understeer at or just over the limit. This set up requires constant attention and is difficult to drive on the street.
Improving tire wear and decreasing lap time are directly oppostite. Increased tire wear comes in conjunction with decreased lap times, as does increased brake wear. When you are using the tires and brakes to their potential they will wear sooner, the price we pay for performance.
I posted some recommendations for setting up tire pressures on another post for you, it is the same proceedure Ernie and I use every weekend. Try to get your tire pressures to +/- 39-40 pounds on all four corners then you will have the advantage of experiencing the true balance of your car. Remember ever set-up is a comprimise in some way, we still have to feel and drive the car accordingly.
If you are concerned about alignment when you have found the tire pressuere 'sweet spot' you may need to measure the temperatures across the tires. This needs to be done when the tires are hot, not warm, and you should have someone do this in pit lane as close to pit-in as possible. Temperatures under 150F are meaningless, you realing want above 180F.
Hope this is helpful, let us know how you make out.
Great job, guys!! Keep that alligator leading the pack!!!
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Cayman S - a portable amusement park
Stan
Congratulations to the entire team. I know that as with almost all race teams, but especially with a new car development, the driver, while very important, can't win alone. I trust that all the guys/gals behind the scenes are able to share the thrill. Thanks for keeping us informed.
BTW, which tires & what sizes are you running on the Cayman?
Thanks for your kind support, we indeed have a good team and it is geting better every day. Fortunately for us our driver is more than a shoe, Ernie is also an experienced builder and race tuner so my job is easier than most crew chiefs and two heads are better than one sometimes, he has taught me well.
We are running Hoosier DOT radials on the Cayman, 245/18 front and 285/18 on the rear. They are smaller in diameter than the stock tires, acceleration is more important than top speed in road racing, and it allowed the car to be lowered 1/2' without changing the geometery of the suspension. We made this decision because Hoosier does not make 235/18's or 265/18's, it seems to have worked well so far.
The rains are Hoosier as well, 225/18 front and 245/18 rears.
Quick question if i can...................How much BHP would you think Porsche could put though a stock Cayman?...........................is it on the limit or with say an LSD it put down a lot more?
Mike
LSD - Limited Slip Differential
A limited slip differential (LSD) is a modified or derived type of differential gear arrangement that allows for some difference in rotational velocity of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. In an automobile, such limited slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity.
The main advantage of a limited slip differential is found by considering the case of a standard (or "open") differential where one wheel has no contact with the ground at all. In such a case, the contacting wheel will remain stationary, and the non-contacting wheel will rotate freely– the torque transmitted will be equal at both wheels, but will not exceed the threshold of torque needed to move the vehicle, thus the vehicle will remain stationary. In everyday use on typical roads, such a situation is very unlikely, and so a normal differential suffices. For more demanding use however, such as driving off-road, or for high performance vehicles, such a state of affairs is undesirable, and the LSD can be employed to deal with it. By limiting the velocity difference between a pair of driven wheels, useful torque can be transmitted as long as there is some friction available on at least one of the wheels.
To see the installation of a LSD style unit Click Here -> Article Forthcoming Stay Tuned
The short answer is I don't know but more than they do at present.
Yes a limited slip would help, they always do. We are bound by PCA Club Racing rules so we cannot run a limited slip and we cannot do much to the engine to produce more horsepower. We are running the stock engine, just like yours, with headers and racing mufflers.
The long answer (short version here) is that you never know until you break it. Porsche build very good and very strong transmissions (600 BHP Chevy engines are bolted to stock G50's all the time in kit cars like the Ultima's). It would be fun finding out.
How's that for 'How Long Is A Piece Of String'...
Stan
PCA - Porsche Club Of America
The Porsche Club of America - http://www.pca.org
CaymanClub.Net members who are also PCA members should request access to the PCA Member only forum by filling in their PCA Member ID# into their profile and then requesting a group membership addition, both of which can be done in the User Control Panel (User CP)
