Sebring 12 Hours 1983 - Racing Sports Cars

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Event: 12 Hours of Sebring, The Coca-Cola Classic		Date: 19.3.1983
Track: Sebring International Raceway (United States), 7.644 kms	Organiser: unknown
Sebring 12 Hours
International Motor Sport Association (round 3) IMSA GTO (round 3) IMSA GTU (round 3) International Motor Sport Association (round 3)

Weather:	warm, dry
Start time:	11:00
Grid:	unknown
Distance:	12 hours
Attendance:	unknown

Entered:	98
Practiced:	87
Qualified:	87
Started:	84
Finished:	43

Classes:	Pract	Start
IMSA GTP	21	20
IMSA GTO	38	37
IMSA GTU	28	27

Photo Gallery Entered Cars Technical Data Appearance Race Results Grid Qualifying Lap Times

Race notes:
5 full-course cautions for 1 hrs, 28 min (23 min)

Pre-race sessions:
3 non-qualifying practice sessions held for a total of 235 minutes on 17/3
2 qualifying sessions for a total of 75 minutes on 18/3

Winners:
Overall:	9	Porsche 934	Baker / Mullen / Nierop
IMSA GTP:	5	Porsche 935 K3/80	Akin / Whittington / O'Steen
IMSA GTU:	66	Mazda RX-7	Dunham / Kline / Compton
Fastest Laps:
Overall:	47	March 83G Chevrolet	Bill Whittington (USA)	2:22.750	192.783 km/h	lap 3
IMSA GTO:	14	Pontiac Firebird	Carl Shafer (USA)	2:35.130	177.398 km/h	lap 2
IMSA GTU:	82	Mazda RX-7	Joe Varde (USA)	2:48.400	163.419 km/h	lap 73
Pole Positions:
Overall:	09	Porsche 935 L	John Paul, Jr. (USA)	2:23.965	191.156 km/h
IMSA GTO:	4	Chevrolet Camaro III	Gene Felton (USA)	2:32.787	180.119 km/h
IMSA GTU:	82	Mazda RX-7	Joe Varde (USA)	2:43.510	168.307 km/h
Notes of interest:
Top makes by numbers:	Porsche (35), Chevrolet (13), Mazda (12), Ford (5), Pontiac (4)
Top engines by numbers:	Porsche (35), Chevrolet (17), Mazda (12), Ford (6), Pontiac (4)
Top car types by numbers:	Porsche 911 Carrera (12), Mazda RX-7 (11), Porsche 911 (10)
Driver nationalities:	USA (201), CDN (7), PR (6), CO (5), ES (5), GB (2), DR (2)
Engine positions:	front-engined (45%), rear-engined (36%), mid-engined (19%)
Oldest known drivers:	Billy Hagan (51), Ronnie Bucknum (47), Jim Cook (46)
Youngest known drivers:	Michael Andretti (21), John Paul, Jr. (23), Dale Whittington (24)
Female drivers:	Deborah Gregg, Bonnie Henn, Kathy Rude, Lyn St. James

Official Race Programme:

Cover	Entry List	Schedule	Track Map

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