Dale Amy
March 8, 2006
Not even washed after the final race of its debut season, the firstprototype "Boy Racer," and half of Multimatic's two-car 2005 factoryteam effort, sits in all its race-worn glory in front of a brand newFR500C (number 014, we think) awaiting customer delivery. Number 05 wonthree Grand-Am Cup races--California Speedway, Laguna Seca, andMosport--in 2005.

Horse Sense: The FR500C began its racingcareer at 3,125 pounds, but early success and the resulting inevitablewhining of competitors saw this legislated up to 3,300 pounds byseason's end.

A Cinderella story, really. In its first year of Grand-Am Cup GrandSport competition, the "Boy Racer" '05 Mustang FR500C took on the likesof Porsche, BMW, Cadillac, and Nissan, handily outrunning them all totake not only the manufacturer's championship for Ford, but also theteam championship (Multimatic Motorsports) and driver's championship(David Empringham).

While these championships are great news for Ford fans, perhaps the mostsatisfying aspect of the Mustang FR500C program is that it's real. Thisis not a case of the factory concocting a couple of mega-dollar"unobtanium" halo cars, then getting bored and moving on to somethingelse. Customers can buy--and win with--the exact same car the factory teamraces. Nor is this some tube-chassis skeleton with a Mustang body gluedon. From the beginning, the FR500C was developed to be a saleable,competitive, turnkey race car--one that was repeatable, dependable, andaffordable (at least by race-car standards)--and is built up from aregular production body-in-white.

Stripped to its skivvies, the R50 version of Ford Racing's 5.0 Cammerreveals a combination of production and application-specific parts. Thesleeved aluminum block with its 3.70 bore and flat-top pistons comesfrom the FRPP M-6007-T50 crate engine, and the heads are stockFour-Valve Ford GT with upgraded valves and springs. The R50-specificcams and intake are configured to produce a level of power and torqueagreed upon with the Grand-Am Cup sanctioning body. Everything is aimedto live happily right up to the 7,000-rpm rev limit.

Having amassed five victories out of its debut season's 12 races--enoughto tie a series season-win record and secure the above-mentioned trio ofchampionships--even those less biased than ourselves would surely have tojudge the program a resounding success. How good is the FR500C right outof the box? Well, consider that privateers, Blackforest Motorsports,took delivery of theirs just two days before the '05 season opener atDaytona--and promptly won that event. Obviously, there was little time--orneed--to make adjustments. The FR500C was too good, in fact, causing thesanctioning body to add a total of 175 pounds of ballast over the courseof the season, and mandate the replacement of its original 4.10 gearswith less energetic 3.55s. Despite this rule hobbling, BlackforestMotorsports also managed to win the last race of 2005 at VirginiaInternational Raceway. The factory Multimatic team accounted for theFR500C's other three victories.

With such a world-conquering initial season under its belt, we thoughtwe'd take a look at what goes into the construction of each and everyFR500C, an international combined effort of Ford and a select fewcorporate partners. By the end of this tome, you'll likely agree that,at $125,000, the FR500C is one of the great bargains of the road-racingworld.

Partners In Performance

Normally hidden away beneath aluminum Ford Racing-scripted plenumcovers, the R50's decidedly racy-looking, molded-nylon intake trumpetsare varied in length in order to maximize the area under the torquecurve. With fixed geometry for relatively high rpm optimization, FRPP'sAndy Schwartz made full use of the S197's additional hood clearance indesigning this manifold, which, if the stars align, will becomeavailable in an upcoming Ford Racing Performance Parts catalog.

Without a doubt, Ford's principal partner in the program is longtimeassociate, Multimatic Motorsports, based in Toronto, Canada. Themotorsports division of Multimatic has engineered and built many asuccessful road racer, was instrumental in the suspension configurationand on-track development of the FR500C, and is responsible for its finalassembly. But each car's gestation starts back home in Detroit, where abody-in-white finds its way over to Watson Engineering for a flurry ofseam welding and installation of a stout rollcage.

Meanwhile, the FR500C's 5.0 motivation is being hand-assembled at Ford'sEngine Manufacturing Development Operations building in DearbornHeights, an understandably secretive skunkworks where FoMoCo's futurepowerplants are under constant development, and where journalists withcameras are apparently immediate cause for managerial apoplexy. And thefinal outside contributor that we're aware of is McLaren VehicleDevelopment, which crafts the racer's unique stainless steel headers andmodified oil sump.

Enough introduction; the following photos and captions provide a bitmore detail of how the championship-winning FR500C Mustang takes shape.

Dependable Power

We stumbled across this rack of right-side, stainless-steel FR500Cheaders fresh off the welding jigs. Though not visible here, these arebunged for oxygen sensors. As you can see, no attempt was made toequalize lengths of the 17/8-inch primary tubes.

Ford Racing calls it the M-6007-R50; we call it lust in aluminum. By anyname, the FR500C's hand-crafted 5.0 cammer has proven itself to be morethan sufficiently powerful and dependable. This is where we'd love totell you exactly how powerful, but Ford isn't talking. The official lineis that the R50 was configured to reliably generate a certain level ofhorsepower and torque deemed desirable by the race series' sanctioningbody. And let's not understate that reliability thing--there were no R50failures during the '05 season, and post-season teardowns were more outof curiosity than necessity. By the way, we had hoped to show you theprocess of an FR500C engine being hand assembled--as each and every oneis--but Ford's understandably restrictive policy about cameras in theEMDO facility soon put an end to that idea, and resulted in all ouraccompanying engine hardware photos being taken in the staff lunchroom.

Pride of participation in the FR500C program is evident in this dataplate welded to each header. The initials stand for McLaren VehicleDevelopment Corporation.

The R50 starts as a bare M-6010-T50 block, basically an aluminum Cobrablock having water-jacket modifications sufficient to permit thin-wall,centrifugally cast, nodular-iron liners of 3.70-inch bore. Some areas ofthe block made thick for production applications (for reasons of NVH)have actually been thinned for lighter weight (this should tell yousomething about the bull strength of a stock aluminum Cobra block). AtEMDO, the block is deburred and the cylinders honed using deck plates,and in goes a production NA Cobra- or Mach 1-style steel crank, modifiedonly for balance to account for a reciprocating assembly consisting ofTerminator-style Manley rods and the same flat-top forged pistons usedin the T50 crate motor, good for about 11:1 compression. Main caps arethe older-style nodular-cast-iron versions, which Ford Racing feels tobe superior.

McLaren also makes the 9-quart, thoroughly baffled oil pans for theFR500C.

On top go production Four-Valve Ford GT cylinder heads using specialvalves and springs for sustained high rpm. Valve diameter, however, isunchanged, and the lifters, rockers, and cam drives are standardproduction parts. The cams themselves, according to Ford Racing's AndySchwartz, have "one-half-inch lift and relatively short duration."

That eye candy atop the R50 is a fixed-geometry (no variable runners)intake fed by a stock Cobra dual-bore throttle body. Ford Racing madefull use of the '05 Mustang's higher hood line when designing themanifold, the configuration of which is instrumental in meeting thetargeted horsepower and torque levels of the Grand-Am Cup series.


On the bottom is an in-house-designed, McLaren-fabricated, high-capacity(9-quart) oil pan baffled for the high-g antics of road racing, and theR50's headers are non-equal length with 17/8 primaries and 21/2-inchcollectors. Injectors are 42-lb/hr Lightning units, and the 90mm massair meter is also Lightning sourced. Factory engine management hardwareis retained, but calibration is done specifically for theseries-mandated Sunoco GT100 fuels.

This total engine hardware and calibration package is homologated,meaning neither can be varied from race to race. Incidentally, we'll seethe R50 engine assembly itself, and eventually many of its individualcomponents--including the intake and cams--make appearances in upcomingFord Racing Performance Parts catalogs.