Welcome to the IMSA History unofficial website

This site is aimed at bringing you memories from the glory days of sportscar racing in the US.



1981 GTX facts

GTP cars were allowed, challenging the GTX silhouette cars.

Brian Redman drove the Cooke-Woods Lola T600 to the crown.

Paul Newman drove the Bob Sharp Datsun ZX Tc but the car was under development.

BMW entered a M1C, which was driven by David Hobbs. The car was competitive, but scored no win.

Andial campaigned a new Porsche 935, which was driven by Rolf Stommelen and Harald Grohs to four wins.

Gianpiero Moretti purchased the Joest Porsche 935L which proved extremely fast.

John Paul Jr did emerge as a rising star, driving his father's Porsche 935.

Larry Stephens entered a Chevrolet Corvette Tc which was pretty fast but unreliable.

Mauricio de Narvaez won the most improved GT driver award.

Klaus Ludwig ran a Zakspeed powered Ford Mustang Tc and won at Brainerd.

Billy Hagan and Gene Felton drove an AAGT Chevrolet Camaro prepared by Frings Engineering.

Del Russo Taylor had a Chevron B36 Buick converted to GTP specs.

1981 GTO facts

The GTO class was dominated by the Red Lobster BMW M1 which was driven to the title by David Cowart. He won 11 races out of the 16 race schedule.

Chuck Kendall debuted a Porsche Carrera RSR then switched to a BMW M1. He and co

driver Dennis Aase won at Road America.

Don Devendorf drove the Electramotive Datsun 280ZX Tc to some good results.

Chet Vincentz drove a Porsche 934 which grabbed some fine results.

Group 44 entered two Triumph TR8s at Sebring. After dominating the race, they finished in 2nd place.

Oftedahl Racing campaigned a pair of Chevrolet Camaros, mainly driven by Bob Raub and Dave Heinz.

1981 GTU facts

Lee Mueller won the GTU in a Kent Racing Mazda RX7 over his teammate Walt Bohren in the last race.

Wayne Baker had an outstanding season in his outdated Porsche 914/4.

Patrick Jacquemart ran a Renault Le Car Tc in the early events, but he was killed while testing the car at Mid Ohio.

Roger Mandeville and Jim Downing were backed by BF Goodrich in their Mazda RX7.

George Follmer was back in the GTU class with a pair of Toyota Celica which were in the early stages of development.

Bill Koll campaigned a Porsche 911SC which was sporting a lowered chassis.