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post #1 of 2 Old 17th August 2007, 01:26 AM Thread Starter
Dick Fidd
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Lightbulb Longer 7th cog + 4.10 rear...

After only a couple of days with the M5, I feel sad that I live in the US. It seems abundantly clear that the car was meant for faster roads. If you hit 3rd gear under acceleration, you are speeding... and we have 7 gears. So, what do we do to enjoy the car a bit more without going to jail and endangering the lives of others in the process?

I would like to know if it would be possible to swap our 7th cog for a longer gear so that we could use a 4.10 (or shorter) rear without elevating our highway cruising RPMs.

This would give us more usable thrust and more gears to play with while staying in 2-digit speeds. As well, highway fuel economy wouldn't suffer, as the engine could loaf at stock RPMs when in 7th.
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post #2 of 2 Old 18th August 2007, 06:34 PM
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I feel for you as i used to live in the US when doing my higher degree and couldnt strech the legs of my e39 m5.

you have 2 choices though, either get a lower rear diff (stock m5 is still faster than it pass 125) or move to another country. Maybe Germany for autobahn highspeed cruising
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