5 replies to this topic

[toadstool]

HI Guys
my front subby is nearly ready to have the engine fitted but before i do that i wondered if i should change the final drive, I have a MG Metro engine (and box) but i am fitting 10" wheels

Should I change it and if so what to?

Any opinions appreciated

[Cooperman]

If you want best acceleration you could go fo a 3.44, which was the Cooper 'S' 1275 FDR. Or for easier cruising a 3.2:1 might be better.
It depends on how you want to use the car.

[Noris8322]

The standard diff in the MG metro engines is 3.44. With 10" wheels I'd be looking at a 3.1 or 3.2 diff, but it depends if what you want - acceleration or motorway cruising

[toadstool]

I am looking for a bit of both really, its only a w/e toy so dont need to do high motorway speeds, having said that i dont want it reving its nuts off at 60mph

[Cooperman]

First of all you rally need to check to see what FDR you have. Don't rely on guessing and hoping. Count the number of teeth on the crownwheel and divide the number of teeth on the pinion into that number to get the existing ratio.

[racingbob]

i have 3.4 in mine great for lanes i love it

motroways mmmmm