A brace of Auto Meter gauges,...
A brace of Auto Meter gauges, which monitor speed and rpm in one unit, as well as oil and boost pressure, coolant temperature, and fuel level, replaced the stock gauge cluster.
The world of the developmental mule cars is much like ghost writing for a famous celebrity—you do all the hard lifting and take all the bumps and bruises, only for the star to get all the accolades. Such is the case with this particular Pontiac Sunfire. Its story is one of those where the true qualities of the vehicle are somewhat lost by its rather plebian platform. True, this prototype Sunfire has a lot of boy racer-style wings and graphics, but its true beauty is very much under the skin.
First, a word about the Pontiac Piranha. It was the follow-up concept to the ’99 GTO and Aztek prototypes, and pointed to a new direction in active lifestyle vehicles that GM’s designers were dreaming up. This vehicle combined the athletic nature of a “hot hatch” with the versatility of a small SUV. Like many of the concepts Pontiac built during this period, it could have been a segment-defining product like the ’64 GTO was—if the upper management had the guts to release it. Instead, it was another great idea watered down to nearly unrecognizable levels.
Leather bucket seats with black sides and yellow seating surfaces adorn the interior. The stock steering wheel was replaced with a Piranha steering wheel. Paddle shifters are mounted on the steering column, making for instantaneous gear changes, and the stock console features a block-off plate where the shifter used to be.
The Piranha mule began as a pre-production ’97 Sunfire, and as such, received a VIN with an EX suffix, indicating it was not for sale. It was sent to Pontiac Special Vehicle Engineering, where it was built up under the direction of SVE Manager Tom Goad. The idea was to replicate the mechanical aspects of the Piranha, while being able to drive it around without attracting the attention of spy photographers. A show car and this mule were built.
This Piranha Mule Car started...
This Piranha Mule Car started life as a pre-production ’97 Sunfire, and was treated to a host of mechanical and visual upgrades. It escaped the crusher through the 2008 Barrett-Jackson Las Vegas auction.
Its powertrain was identical to the show car, and featured a supercharged version of the 2.2L GM EcoTech four-cylinder before the now-familiar engine family was released for production. It used an Eaton supercharger and an air-to-liquid intercooler to generate 212 hp and 220 lb-ft of torque.
A modified 4T65E-HD front-drive transaxle, with custom internal pieces developed by GM Racing’s front-drive racing team, was employed. This trans was not available in the Sunfire, so it took fabrication to fit it in the small J-body chassis. It also featured a unique Formula-1–style paddle-shifter system later found in the Grand Prix GTP Comp G package, which was released for the ’04 model year.
Before the engine family was...
Before the engine family was even announced, the supercharged 2.2L EcoTech four-cylinder was installed. It features an Eaton supercharger kit, air-to-liquid intercooler and a K&N air filter. It is connected to a modified 4T65E-HD transaxle.
A TCI electronic transmission...
A TCI electronic transmission control unit allows for custom calibration of shift points, line pressure, and other functions. This unit was used in the NHRA compact drag cars that GM was campaigning at the time.
With an air duct leading to...
With an air duct leading to the air filter, the Ram Air hood is functional, though the filter is not separated from the rest of the engine compartment with an airbox.
Changes under the skin continue with custom front and rear independent suspensions. The stock Sunfire rear suspension is a semi-independent system that uses a torsion beam design, so a true IRS upgrade greatly improved handling. All four corners feature double-adjustable Koni shock absorbers and six-piston Brembo brakes with two-piece cross-drilled rotors. Rolling stock consists of 18-inch Focal aluminum wheels shod with Goodyear Eagle GS F1 rubber.
In order to keep the undersized...
In order to keep the undersized motorcycle battery fresh, a built-in battery charger is used. The AC plug hangs free near the front of the car.
To today’s viewer, the mule car’s exterior looks a little dated, but that’s actually the charm of a prototype car—it’s a snapshot of what was once the cutting edge. Owing to the then-burgeoning import tuner field, the Piranha reflects many of the customizing cues in-vogue at the time. The Sunfire features a dual-snorkel Ram Air hood, large wheel flares and a rear wing that mimics the one used on the later Toyota Supra. A pair of projector-beam headlamps on each side replaced the single fixed production units.
Originally an aqua color, the Sunfire was repainted yellow with large red and matte black graphics. Its engine compartment is also matte black—it’s body-colored on production cars. Dark window tinting rounds out the visual package.
The underside of the Piranha...
The underside of the Piranha shows several interesting things: traces of the original aqua paint, the 4T65E-HD transaxle installation and the Odyssey PC 925 dry cell motorcycle battery, remotely mounted for increased engine compartment space. Its exhaust system is simple and fits in the stock location.
Viewing the mule in person, one almost instantly notices the increased width. It’s almost like the body was dropped on a chassis a bit too large for its dimensions—but that’s intentional. The car was built to replicate the chassis dimensions of the concept car, so the track width is kicked out a significant amount.
Unlike many of the mules before it, the Piranha/Sunfire had a new lease on life. Due to product-liability issues, these cars were normally destroyed after their tour of duty was completed, but some became part of the GM Heritage Collection—like this one.
This GM Proving Grounds tag...
This GM Proving Grounds tag helps authenticate the Sunfire’s pedigree. There’s no doubt that the Piranha mule car was subjected to some vigorous testing by GM engineers.
If anything good can be said about the financial woes GM experienced leading up to its bankruptcy and reorganization, it did see many one-of-a-kind vehicles sold off that likely would have been otherwise destroyed. In order to show the federal government that it was working hard to fix its money troubles in the months before the bankruptcy, GM partnered with the Barrett-Jackson auction house to release approximately 150 “non-essential” vehicles from the Heritage Collection at a 2008 Las Vegas auction. This prototype was sold, while the actual Piranha remained with GM.
It was eventually sold to American Classic Motor Cars in Ocala, Florida. Owner Richard Clark bid $10,450 and became the winner of the auction. His partner, Josh Hart, runs the business on a daily basis. “It’s a phenemonal car, very understated—until you drive it.” He said that it ran a 13.4 at 101.75 mph in the quarter-mile. “We tested it just a couple of weeks ago at Gainesville.”
Koni double-adjustable shocks...
Koni double-adjustable shocks are used at all four corners, making for easy tuning during the car’s testing phase.
He added that there were some minor electrical problems and the odometer didn’t work. It’s believed to have more than the 43 test miles that the odometer shows.
Unfortunately, the Piranha concept remained just that—a one-off that, from a marketing standpoint, was replaced by the Pontiac Vibe, sending buyers off into uncharted frontiers of Toyota-based mediocrity. Even the promise of an upgraded Sunfire never came to be, though a version of the supercharged powertrain found its way into the first Chevy Cobalt SS, before switching to a more powerful EcoTech turbo combination.
As usual in that period, Pontiac did all the heavy lifting and received little for its efforts.
It features a Toyota Supra-like...
It features a Toyota Supra-like rear wing and wheel flares. Dual-exhaust outlets feed from a single muffler.
Independent rear suspension...
Independent rear suspension system uses custom control arms and trailing arms combined with production hubs. Note the unusual rear-sway-bar mounting system.
An Aero Tech Laboratories...
An Aero Tech Laboratories fuel cell is mounted in the trunk for easy access and maintenance. It uses the stock Sunfire fuel-filler location.
An EX suffix at the end of...
An EX suffix at the end of the VIN indicates that this car was a pre- production model and was not intended for retail sale or road use. To satisfy GM’s legal department, the prototype was sold through Barrett-Jackson on a bill of sale only. There was no title.
The Piranha’s wheel/tire combination...
The Piranha’s wheel/tire combination consists of 18-inch Focal wheels, which mount P225/40ZR18 Goodyear Eagle GS F1 tires. The wheel spokes have been color-keyed to the graphics package.