Peter Challis was fortunate to be awarded victory in the New Millennium race at Snetterton, having been unable to restart his Porsche's engine during his pit stop – but profiting from Oliver Petch's race-stopping crash.
The Ford Focus driver clipped the inner kerb at Murrays corner, which launched his car into a series of rolls, ending upside down on top of the safety barrier and bringing the race to an immediate halt, leaving Feltwell's Challis declared the winner on countback.
A trip across the grass at the Esses started an exciting Open Series race for Simon Smith, who had to work his way by Jonathan Mitchell and then Gary Bate, who had sneaked ahead at the pit stops, while Challis gave chase in the Arrowpak Porsche.
Bate got his revenge in the Magnificent Sevens race on Sunday, while Christian Pittard's challenge faded when he stalled his engine during his pit stop and Smith needed a wheel change before continuing.
However, Smith triumphed for a second time in the Sprint race, helped when Bate spun at Hamilton's.
Fressingfield's Carl Chambers had to settle for fifth place in the Tin Tops encounter as Steven Simpson passed Nigel Tongue for victory, while Matthew Wurr won the Future Classics with a last-lap pass demoting Miles Masarati.
Mid-Norfolk based Will and Michel Goff's battle for a podium place in the Classic K race ended with gearbox failure while Tim and Mark Cousins profited from an early pit stop to take victory.
Suffolk racers Ian Everett and Tim Cairns fought hard over victory in the Swinging Sixties Group 1 race with the former narrowly taking his maiden win.
Norwich's Malcolm Johnson raced to third place in Class H of the Group 2 race while Mark Halstead and Stuart McPherson charged past a spinning Nick Fleming on the final lap to snatch a dramatic victory.
Keith Ahlers dominated both the Morgan Challenge races, while Halesworth's John Milbank finished fifth in class in race one, but retired in the second. James Ramm's first-lap pass at the Esses on Coli Philpott secured victory in the opening Jaguar race and he repeated the feat in Sunday's second race while Edward Leigh/Thomas Houlbrook won the Modern Classics encounter.
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