18-05-2021, 10:24 AM
(16-05-2021, 07:04 PM)12jslater Wrote: How easy would it be to change the differential ratio for a slight lower over all gearing, 1st gear seems very short in a seven and useless 2nd gear hill starts are easily possible so I was looking at getting a bit more top end speed, just being able to sit at 45mph with a lower engine speed than what feels like a million rpm.
I'm not looking for any more speed just lower revs when I travel long journeys.
Hope to hear your thoughts
Have to admit I’m a little confused by your question — you are not looking for more ( road ) speed, just lower revs on long journeys. In which case you would want to raise overall gearing, not lower it.
The Ruby is arguably over geared in standard form and back in the sixties etc the answer was to build a relatively lightweight special which solved a lot of problems. This, is probably not what you want to do so you’re options are, use correct 400 tyres on your 17” wheels, fit a four speed close ratio box ( as has already been mentioned), get your engine sorted, wear ear plugs and practice meditation.
I havnt mentioned going on a diet of lettuce leaves but you could look at any unnecessary weight you are carrying in the car eg use a light weight Jack in place of original etc.
Hope this is helpful!
Charles