Fiero IMSA Racecar SummaryMy car uses a tube chassis as the rigid, yet light, platform in which this road race car is based. Next, I added a suspension designed specifically for my chassis and engine combination by one of the original builders of the IMSA cars (E.J. Trivette). I installed a big horsepower motor (645 hp 412 ci SBC) for some GO and 1-¾” four piston calipers on 12.72” vaned rotors for the WHOA and this machine was ready for business. Of course, the power has to get to the ground. To do this, a Porsche 930 drivetrain is used to drive 14” wide Hoosier racing slicks. Last but not least, the body. For the body I was very lucky to find an original DGP (Diversified Glass Products) tube chassis fiberglass body. Of even more interest is the fact that has been confirmed by John Callies as a Pontiac prototype race body.
For the most part, I built this car myself. I estimate about 4000 hours. That may be low.
I think I have always been a big Pontiac fan. Like many here I was hooked on Smokey and the Bandit at the age of 8. I decided I had to have a black Trans Am. In 1996 I ordered a Black WS6 6sp which I still have (5210 miles). I also became hooked on Fieros. My daily driver is a blue 87 GT 5sp. My high school car was a black Pontiac 6000 STE. I loved that car.
VEHICLE SUMMARY: Performance:
- VanDerLey 412 ci SBC with prototype Pontiac 867 heads. (1983 vintage)
- 645 hp at 6700 rpm 577 lb.-ft. torque at 5300 rpm 13.9:1 compression
- Holly 850 carb custom tuned and jetted by VanDerLey Engines (930 cfm)
- Callies Crank
- Comp Cam
- Solid 1.6 TD Rockers
- JE Pistons
- Carella Rods
- Dry sump oiling system with 3 gal. reservoir
- Accusump system (3 qt.)
- 1986 Porsche 930 4 speed transmission
- KEP 800 lb.-ft. clutch, flywheel, and pressure plate
- Renegade Hybrids custom fabricated shift linkage (and then modified)
- Custom fabricated headers and exhaust
- Dual Borla XR1 mufflers
- Porsche 930 axles
- Fuel Safe custom fuel cell (15 gal.)
- MSD Box, coil, and distributor
- AFCO Radiator (custom)
- Fluidyne heat exchanger
- Dual Fuel Filters
- Ram Air Brake Ducts (front)
- VP C12 Race Fuel
- Functional RAM AIR Roof Scoop Air Intake (inlet to outlet ratio = 2:1)
Control:
- 23.5x10.0R16 GOODYEAR G19 race slicks (front)
- 25.5x14.0R16 GOODYEAR G19 race slicks (rear)
- Wilwood Superlite 2A 1.75 bore four piston calipers on 12.72"x1.25" 48 vane rotors (front)
- Porsche 930 4 piston calipers on 12.19" cross drilled rotors. (rear)
- Dual 7/8" / 3/4" master cylinders with brake bias control and gages.
- Appleton 2.0 rack and pinion
- Suspension custom fabricated by E.J. Trivette (one of the 2 original IMSA Fiero fabricators)
- Removable steering wheel
- Speedway Engineering front hubs
- Speedway Engineering 1" hollow swaybars
- Porsche 930 Rear hubs
- 4" "Chin" air splitter to add nose down force
Safety:
- 6 point harness with cam-loc and 3" wide belts (driver and passenger)
- Kill switch (internal and external)
- Onboard 10 lb. fire system.
- Inertia fuel switch
- Window net
- Polycarbonate front (1/4") and rear (1/8") windshields
- Sparco Pro 2000 Seats
Other:
- Corvette Millennium Yellow Paint
- Wide body rear quarters
- Cockpit adjustable throttle linkage
- Auto Meter Gages
- Functional fiberglass door (DS)
- Custom interior sheet metal
- Custom front and rear clip fabrication
- Custom rear engine mounting (longitudinal)
- Passenger Seat (too much fun for one person to have
)
- G-Tech Pro
- Optima Red Battery
- Factory gearshift knob
- Factory tail lights
Body:
-Original Pontiac IMSA/Drag Car Prototype Body.
-“0001” prototype code verified by John Callies.
- 2008 = Widebody IMSA Race Shell replaced the back half of the car to improve performance. Back half is not prototype however all panels have been stored correctly.
Performance:
- ¼ mile: 10.5 sec at 137 mph (est.)
- 0 to 100 mph: 5.2 sec. (est.)
- Top Speed: 215 mph (est.)
- HP to Weight Ratio without Ram Air: 3.6 with driver
Conservative numbers using "Car Test" software.
Brief History: Although this is not an original IMSA SD4 car, pieces have been fabricated and assembled by members of the original Pontiac race group. I consulted with John Callies (former head of Pontiac Motorsports and father of the racing Fiero) during the project for engineering input. E.J. Trivette (original IMSA Fiero suspension fabricator) built the suspension from scratch himself to his own specifications given the physical constraints of the body and chassis. Paul VanderLey (original IMSA SD4 builder) build the 412ci SBC engine. Originally, this was his personal motor for Bonneville Salt Flat competition. Paul has broken speed records wih his 34 coupe, and won many championships over his 50 year carrier. A road-racing cam was installed per Paul's recommendation combined with the 13.9 to 1 compression ratio and the use of VP C12 race fuel. The body is one of the (if not the last remaining) prototype fiberglass shells used to give John and his group ideas of how the body would work aerodynamically during wind tunnel testing. Almost certainly the last prototype shell that was unpainted and un worked. The “0001” on every panel designates that each is a prototype piece. The fact that the body has not been painted in the last 20 years is unusual if not unique. Only 15 original Huffaker IMSA Fieros were built.
Please see:
http://www.cardomain.com/ride/789315
for the full build detail