I have a EL i6 with the JMM Dev 3 kit fitted.
It's an auto and fairly dull down low.
I've heard that changing the diff ratio will make it livelier.
I'm chasing good 400m times and 0-100.
Has anyone changed the crown wheel and pinion on one of these to something in the order of 3.9 gears ?
I don't mind if it revs a bit high on highway cruises as it is 90% an around town car.

Thanks.

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