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Top gear mph/1000rpm on a 403 etc.

6 cyl Bristol cars Type 400 to 406 - restoration, repair, maintenance etc

Top gear mph/1000rpm on a 403 etc.

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23-06-15, 06:46 PM

2valvehead 2valvehead is offline

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Join Date: Oct 2010

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Depends what crown wheel and pinion is in the differential. The standard ratio will give c20mph/1000 revs on a Michelin X tyre. The overdrive bumps this up to c25mph/1000. The o/d does make a huge difference; especially if you are thinking of some serious journeys. Less revs = better mpg + less wear all round.

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