HSR Cayman Interseries


Well, my little trip out to Sebring to check out the HSR Sebring Fall Classic was met with a near total washout. I had decided to head over to the track on Friday since the cars would be running late and in hopes of catching some sunset shooting. Well, in order to have a sunset, first you’ve got to have sun. On this day… not so much.

But, in the spirit of “what-the-hell, I’m already here,” I did a tour of the circuit and caught some of the vintage Porsches hanging it out in the rain. And rain it did.

I also, however, had quite a pleasant surprise in discovering the HSR Cayman Interseries. These cars are very cool and absolutely great looking.  Billed as “Back to the Future,” Historic Sportscar Racing Ltd. (HSR), only recently announced the Cayman Interseries Challenge featured the Series as a guest group at a number of HSR races in 2009. The program was put together in association with Ron Barnaba of Napleton Porsche and features race prepared spec Porsche Caymans. The goal is to have a full field of 20+ cars at selected races in 2010.

We caught up with our resident ace pilot and 2005 American Le Mans Series Rookie of the Year, Guy Cosmo, just after he climb out of Jim McCormick’s No. 44 “Martini Rossi” Cayman S. The driving duo took top honors for the Cayman Interseries in Sunday’s 4 Hours of Sebring at the 2009 HSR Sebring Fall Historic Classic. Guy couldn’t have been more enthusiastic.

“These Interseries Cayman S race cars are a blast,” said Cosmo. “I had a lot fun driving this car. It’s responsive, well mannered and extremely neutral. I can’t imagine anyone not having fun driving in this series. The car inspires confidence, it gives plenty of warning, it’s gentle when it let’s go and very manageable to recover. This is the perfect car for many levels of driver… beginner or pro. Honestly, I can’t say enough about the car.”

“This is a great opportunity for the gentleman driver,” Cosmo continued. “When I say that, I’m referring to the sportsman driver that is looking to go racing, keep costs in check and have a great time. I have several clients I coach that would fit this car and race series to a ‘T.’ I’ll definitely be making a recommendation that they take a long hard look at this program.”

I asked Guy why a program like this is so appealing to the sportsman. After all, there are lots of support series and other forms of racing geared toward the so-called gentleman driver.

“The appeal, as I see it,” said Guy, “is more than just cost. This is fun. And that’s important to the sportsman. There are a lot of drivers that aren’t interested in moving up to the next tier or going wheel-to-wheel 15 weekends a year. That’s a lot of stress and it’s not hard for the fun to go out of it. I mean it’s one thing if your goal is to be a pro driver or go for a championship, but if you’re just coming out here to socialize, let your hair down and have some fun, the intensity of some of the other sportsman series can wear you down pretty quick.”

“When I look at the Cayman Interseries,” Cosmo added, “where you can buy a brand new race car fully equipped for $86,000 and know your race weekend costs are going to remain manageable, that holds a lot of appeal. Think about it… $10K for a motor… $4500 for a transmission… these are very reasonable numbers when you look at most other forms of racing. Ultimately, though, I come right back to the number one reason… these cars are a blast to drive.”

So how does this fit in with the HSR? Well, the “Historic” part comes in the form of the livery of the cars. Each of these race prepared chassis will have a unique graphic package from Porsche’s racing history. Cars sporting the Gulf, Martini, Lowenbrau, etc. will each be sold with a corresponding chassis number. Since there are limited amount of modifications allowed, it keeps the cost in check and keeps the emphasis on driving. What you end up with is a true “drivers series” with absolutely fantastic looking cars.

Earlier this year a “prototype” debuted at the HSR Watkins Glen weekend in June and out of the box in exhibition form, the car “qualified 5th in Group 5” with Jack Baldwin at the wheel. I am told there’s been a lot of interest from HSR drivers and there is a limited production of 30 cars being produced for the series. To kick things off, HSR members receive purchase priority for a limited time.

So, let’s review. You call up Ron Barnaba over at Napleton Porsche of Westmont. You tell him, “Ron, I’ve got $80K and I want to go racing. And, by the way Ron… I want to be competitive and I want to look good!”

Guess what? Ron’s not going to laugh. Ron’s going to put you in a race ready 2010 Cayman S ready to go for the 2010 HSR Cayman Interseries Grand Champion’s title. For $79,900.00 here’s what you’ll get:


  • Full Roll Cage with “Nascar” style door beams painted body color
  • Window net
  • “SFI” roll bar padding
  • Cobra ‘Hans’ style race seat and brackets         
  • Schroth 5 point quick release harness
  • Remote on –board fire system with 8 nozzles
  • Electrical cut-off switch
  • “MOMO” steering wheel  with adapter
  • Quick release hub& roll bar hook     *Optional*
  • “Cayman Interseries” Front splitter and “GT3” style adjustable rear spoiler painted body color *Optional*


  • JRZ “Pro” adjustable remote reservoir shocks
  • 3 way adjustable front and rear sway bars with heim joint drop links
  • Hypercoil  Springs with helpers
  • Solid spherical bearing  upper shock mounting plates front and rear
  • Pagid RS29 brake pads
  • Stainless steel brake lines
  • “Endless” racing brake fluid
  • “GT3” two piece lower control arms with monoball bearings and adjustment shims
  • Solid front and rear control arm bushings
  • Adjustable front thrust/caster bars
  • Spherical bearing tie rods with bump steer ends
  • Rear toe links with bump steer adapters
  • “GT3”  front brake ducts     *Optional*
  • “NACA” rear brake ducts     *Optional*


  • Special series exhaust system
  • Additional center radiator, ducts, bracket and hoses
  • Electric  pump with oil cooler and electrical fuse panel  *Optional*

To keep things on the up-n-up, ALL ENGINES, TRANSMISSIONS, ECU COMPUTERS AND PORTS WILL BE SEALED and SHOCKS AND SPECIAL SERIES SUSPENSION PIECES WILL HAVE CODED TAMPER-PROOF LABELING. Your Cayman S will come with a stock set of tires and wheels and will be delivered with a basic alignment and set-up. Paint/graphics /decals are not included and, of course, you are responsible for individual race prep, data, driver comfort aids etc.

For Information, contact:
Ron Barnaba, General Manager
Napleton Porsche of Westmont
201 E. Ogden Avenue
Westmont, IL 60559

Cayman Interseries Challenge Rules


Only 2009/2010  Cayman”S” cars are eligible. Must compete with full road equipment and, with the exception of exhaust/emissions, be street legal as designed by the factory, capable of being registered for street use in the condition of the car when presented at scrutineering, and capable of being driven to and from the event. All cars are required to have a Historic paint scheme. [Example; Martini Racing, Rothmans, Gulf, Hippie Car, etc.]

1.) Engine

A.) As delivered from factory. No modifications after the air filter or before the exhaust muffler.
B.) Stock, fuel injection must be retained.
C.) Air conditioning belts, hoses, condensers, compressors may not be removed.
D.) Radiators are free. Radiators must be installed in the stock location. Anti-freeze is prohibited.
E.) Any dual mass flywheel may be replaced with a single mass, ferrous material (magnetic) flywheel. Clutch disc
must remain stock diameter.
F.) An underdrive pulley { GT3 type}on the crankshaft for the power steering belt may be used.

2.) Suspension

A.) Suspension pick-up points must remain as stock in location and type.
B.) Added material may not connect with roll cage components or otherwise provide chassis stiffening .
C.) Shocks and springs must be series spec {TBA}
D.) Any suspension setting not requiring machining or modification of factory parts is allowed.
E.) Sway bar sizes and configuration must be series spec. {TBA}
F.) Suspension bushing materials are free. Replacement of suspension bushings cannot alter the suspension geometry of the vehicle.
G.) Any bolt-in shock tower brace is allowed.
H.) Toe links/bump steer links may be replaced
I.) OEM two-piece lower control arms {GT3 Type} are allowed.
J.) Front and rear uprights must remain stock.

3.) Tires and Wheels

A.) Only the series spec tire will be approved. [TBA]
B.) Tread must be a minimum 2/32” over 2/3 of the tire at the start of each session (practice, qualifying, race). There must be visible tread remaining on the contact surface of the tire at the end of each session.
C.) Wheel type and style are free, providing wheel meets or exceeds factory safety specifications.
D.) One inch wider than originally supplied wheel which fits inside the stock body without rubbing and without modification exceeding “rolling” or “grinding” of the outer fender lip is allowed. Spacers are permitted.

4.) Brakes

A.) Brake pad material and stainless brake lines are free.
B.) Brake calipers and rotors must be as delivered by the factory.
C.) Ducting of air to rotors is allowed.
D.) Removal of dust shields (backing plates) is allowed.
E.) Brake fluid is free.
F.) Master Cylinders must be as supplied stock by the factory.
G.) Hand brake components may be removed.

5.) Transmission

A.) Ratios of ring and pinion and individual gear sets must be stock.
B.) Only stock limited slip differentials (LSDs) No locked differentials will be permitted.
C.) Modification to, or substitution of, the shifter mechanism which reduces the range of motion is allowed.
D.) Axels must remain stock.

6.) Body/Chassis/Interior

A.) Removal or substitution of components, other than those specifically indicated below, is not allowed.
B.) Chassis/body, must be the same material and configuration as supplied by the factory. Sheet metal modifications in the spare tire compartment as required for installation of a fuel cell are allowed. A Fuel Cell is not required but highly recommended
C.) Seats are free providing minimum weight [TBA] of vehicle is met. Any ballast to meet weight must be placed in a ballast box and be securely bolted to the chassis in the driving compartment only.
D.) Steering wheels and shift knobs are free.
E.) Only Series Spec front spliters and rear spoilers are allowed [TBA]
F.) Modifications to the underside of the vehicle for the purpose of improving aerodynamics are not allowed.
G.) All interior panels may be removed except main dash panel. Dash may be modified for roll cage installation only. Additional gauges may be added but the stock dash gauges must be retained
H.) Headliners may be removed for installation of roll cages.
I.) Airbags may be removed.
J.) All carpeting may be removed. Sound-deadening and heat shield material may be removed.
K.) Radio/PCM components and climate control system may be removed. Center lower dash may be modified with a panel of appropriate material or removed. Center console may be removed. 

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