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First post: My 2003 BMW 330i Performance Package

Discussion in 'E46 (1999-2006)' started by KrisL, Feb 24, 2008.

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    330indy1

    Post Count: 675
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    why not get a limited slip while you're at it?

    better gear ratios plus posi-traction (without brake influence) is the ticket.

    KrisL guest

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    My condolences, Chip :) :) :).

    Your car actually already has a 3.64, a ratio even shorter than the one I installed. BMW puts shorter final drive ratios in the autos.

    Ratio info here:
    http://www.bokchoys.com/differential/GearRatios.htm

    cwemely guest

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    LOL! I know you are not a fan of automatics. I also like manual, but in DC traffic there are times when the auto is nice. My ideal would be to have a 6sp coupe and a larger auto sedan or suv for the best of both worlds. :)

    Not to be a gear novice but, does the 3.64 mean that that is already a good ratio? How does that compare to the ratio on the 6sp version?

    Thanks!

    KrisL guest

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    Yes.. the ZHP 6spd has a 3.07, the auto has a 3.64. You can't directly compare because I believe the ratios in the transmission are different between the auto and the manual.

    Higher final drive ratio = higher RPM for a given speed = better acceleration = worse gas mileage = lower top speed (assuming your car is redline limited...all E46s are drag limited).

    My wife's S2000 has a 4.10 rear end ... it turns over 4500rpm at 70mph on the highway! (although it does redline at 9...).

    cwemely guest

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    OK. Thanks!

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