The final race of the weekend, the 34-lap feature, also threw up a fair amount of tension and excitement. A cloudburst 30 minutes before the start had teams wondering what tyres to use.
In the end everyone settled for wets as they rolled out on to the grid. Murphy was in the wars early on when Pedersen muscled past on the outside, pushing him across the kerb. Almost immediately Murphy knew there was something wrong with the car.
"The car sledged at the next corner and I thought it might have a puncture," Murphy said. "It was really bad over the hill and at turn one but I decided to keep going.
"By hitting the kerb I broke a front dampener and that made it a bit more difficult - it certainly wasn't that pleasant out there. I just kept going and managed to tool it home and we certainly didn't have the fastest car.
"I was a little bit shocked though that Ant's team decided to pit him when they did."
Young Aussie Morgan Haber and Aucklander Richard Moore closed right up and Haber hounded Murphy for several laps before the chequered flag appeared. The three all for the M3 team.
"That's my best result in a high-level category," said Haber. "I had a few cracks at Murph but he's smarter than me and he held me out."
Pedersen's teams decision to pit him when they did cost the Hamilton driver any chance of a top finish and he had to settle for seventh at the chequered flag. At one stage he held a big lead in the feature race, pushing hard on a damp track. But as the track dried he and some other drivers pitted for slick tyres and this proved a mistake, as their speed advantage was not enough to make up for the time lost in the pits.
"It's been a bit of an up and down weekend and it was probably the wrong call in hindsight. We were doing quite well at the front and the car felt good," said Pedersen.
Murphy now leads the championship by a healthy 170 points from Pedersen. The fourth round, and final of the sprint series, is again at Pukekohe as part of the V8 Supercar meeting over the long Anzac weekend. The three endurance rounds start in September.
Points after three rounds
1. Greg Murphy - 814
2. Ant Pedersen - 644
3. Simon Evans - 600
4. Andre Heimgartner - 595
5. Richard Moore - 572
6. Morgan Haber - 429