08-09-2017, 10:42 PM
Most standard Austin Sevens were badly over-geared.
Fitting a lower axle ratio usually improves the the top speed.
The sports models with low-ratio axles have the highest cruising speed of the standard cars. The Nippy I had 20 years ago was comfortable cruising at 60mph.
This was augmented by close ratio gears, otherwise the intermediate gears were too low.
Fitting a Nippy axle and gearbox will transform performance - however they are rare!
Also it must be remembered that at the same time as the 17" wheels appeared the tyre section was also increased so rolling diameter was much the same.
Fitting a lower axle ratio usually improves the the top speed.
The sports models with low-ratio axles have the highest cruising speed of the standard cars. The Nippy I had 20 years ago was comfortable cruising at 60mph.
This was augmented by close ratio gears, otherwise the intermediate gears were too low.
Fitting a Nippy axle and gearbox will transform performance - however they are rare!
Also it must be remembered that at the same time as the 17" wheels appeared the tyre section was also increased so rolling diameter was much the same.
Jim