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Generation: C4 Year: 1986 VIN: Race Numbers: 88 Ownership: Morrison Motorsports 2nd owner un-declared Sponsors: Morrison Motor Sports Flying Tigers Hella Drivers: Tom Morrison (1986) Bob McConnell (1986) Jack Baldwin (1986) Don Knowles (1986) John Heinricy (1987) Bill Adams (1987) Bob McConnell (1987) Status: Original Color: yellow Tires/Wheels: 1986: Goodyear Eagle racing slicks 1987: Gotti 10 x 16 inch 3-piece wheels Goodyear race tires – size varies by application Engine: 1986: L98 350 – modified as per IROC engines and fitted with Corvette tuned Port Injection (TPI) to generate just under 400 HP, complying with IMSA’s 110 percent rule. 1987: 5.7 liter small block Chevy 425 HP and 420 Ft-Lb of torque built by Katech using L98 cast iron block aluminum heads from Chevrolet HD Parts Moldex crankshaft – raw forging from Chevrolet HD Parts Carillo connecting rods 4.020 bore and 3.48 stroke Compression 10.8:1 Diamon Racing pistons Crame Cams TR-260 roller lifter unit Valve lift of .625 inches and 260 degrees duration Modified TPI features simaeses intake runners and enlarged ports Stock computer with modified programming for the fuel schedule Driveline: 1986 Chassis Configuration: Doug Nash 4 + 1 manual transmission Dana (production) rear end REPCO oversized discs for brakes largely stock and HD GM running gear; running prototype brakes for 1987 Rubber bushings were replaced with hardened urethane bushings 1987 Chassis Configuration: Stock chassis reinforced Roll cage of 2 inch chrome-moly steel Reinforced control arms in stock location 1984 Z51 springs Production anti-roll bars with spherical rod ends Stadard Delco-Bilstein shocks with revised valving Doug Nash fully-synchronized 5-speed race transmission Rear axle and limited slip differential use standard Corvette equipment that has been blue-printed 3.07:1 ratio Top: Interior: Condition: URL: “Stress Test”, by UB Sherman, Corvette illustrated, Vol. #1 No.1, pages 61-65 and pg 85, Fall 1986. “Promise Unfulfilled”, by Bernie Finkel, KEEPIN’TRACK OF VETTES, Vol. 10, No: 7, March 1986, pages 49-50, 60-63. Unique Characteristics: Modifications: Full roll cages, fire extinguishing equipment and fuel cells were added. Flares were added to cover the wider tire. The fiberglass firewall was replaced with a steel unit. Rear hatch and side windows are replaced with lexan pieces. Notes/Race History: Two cars were developed for the IMSA endurance races at Daytona and Sebring, in cooperation with GM Development group. The impetus to develop these cars was two-fold. First, they could serve as test beds for new parts, for the upcoming Corvette ZR1. And, second, based on the success that Corvettes had experienced in SCCA Showroom Stock, there was a good chance that the cars could perform well in IMSA endurance series as well. The two cars entered in the Daytona and Sebring races in 1987 were evolutions of the 1986 cars. Number 88 was more modified than the # 87 car. After running the two premier IMSA events, the cars were then entered in the SCCA World Challenge series. The cars ran only once, at Nelson Ledges (Brainerd/MN). At this point, it is presumed that the main features of the 1988 Corvette had been locked-in and the further expenditure of development money might have been considered un-necessary. Interestingly, 1987 was the last year for Corvettes in the SCCA showroom stock series. Because they had been so dominant for several years rules changes were introduced to ban them from this series. Most Corvette owners shifted over to the Corvette Challenge series. Registry ID Number: 36 View Original Size  www.racingsportscars.com |