In 78 Wheels mag did an article on the King George Tavern A9X driven by Gibson. Although they used Dunlops whereas 05 used the taller wider Bridgestones it gives you a clear answer to the speed with the 3.08 gearing. Nobody used more than 6500rpm down Conrod in the race as it was hard enough (in the era) getting the plastic motor to last a sprint race let alone Bathurst. The old plastic during this period was a very marginal race motor and it would hand grenade at the drop of a hat let alone exceeding 6200rpm for any long duration. During Hardies Hero's Brock was pushing it and would have been doing 270-273Kph but in the race he would have been 8-10kph less. Unlike modern 2013 Bathurst it was a 50/50 race (survival vs speed) and was far more biased to survival of the fittest.
Edited by LXSS350, 02 August 2013 - 04:33 PM.
