wiztecy
Active Member
From looking at borgwarnerdrive.pdf page 18, they make different gear sets for the transmission. Doing some math, the Roadster comes with the 8.3 gear reduction set. If you put in the 9.1 gear reduction set, you would lose about 11mph of top-speed, but you might get to 60mph a few tenths faster.
That would be fun to play around with. I'd be really worried loss in range efficiency when dropping the ratio since my R is my commuter. I'm certain it would be quicker in the 0-60 second times, but believe instead of having that sweet torque between 0-70mph (where it drops after that), it most likely would drop down to a 60 or 65mph ceiling for an early end of that sweet constant torque sweet spot which I want to grow not shrink. If you're using it to drag race, mostly in short sprints then it make sense or better yet, autocrossing. But for a commuter or long range transportation solution its not a good idea.
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