Gear ratios

[CTE]

I am thinking about swapping my standard ratios for a close ratio set up for competition use...any idea how big or even straightforward a job this is in an S1 Elise? Thanks

[kambites]

Presumably changing the diff is going to be easier than actually changing the ratios in the 'box. Swapping your 3.9 diff out for a 4.2 would give you 7% reduciton in overall gear ratio.

[CABC]

i'm interested too. i have a 6 speed version and gearing is too high.
i guess with a transverse engine in a tight bay it's not going to be easy?

[thegreenhell]

The Rover PG1 gearbox was used in many different cars with many different ratio sets and final drives. The commonest swap in a regular S1 is to fit a B4BP from an S1 111S or a regular S2 Elise. These come up on eBay fairly often.

PG1 gearbox codes and ratios are explained here: http://wiki.seloc.org/a/Rover_PG1_gearbox