Changing ring and pinion gears

[circeonya@hotmail.com]

Not the first time I have heard that the A7 engine is much happier in the medium and just over rev range than being laboured at low revs with high throttle openings. My Austin A60 was doing 4,000rpm at 60 miles an hour which was considered a cruising speed in the Sixties, probably our little cars are not going to come to much harm reving at 4000 if the engine is good condition. We were advised with the sports car (which had a pressure fed crank and a close ratio box) that it was time to change down around 2000. Quite a different approach to the modern over square engines.