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Thread: What is the recommended tire air pressure for the E46 BMW 330 ZHP?

  1. #1
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    What is the recommended tire air pressure for the E46 BMW 330 ZHP?

    I have been to tirerack.com and can't find what the recommended air pressure is for the tires on a 330i with the performance package. What do you guys/gals suggest?

  2. #2
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    The BMW-recommended pressures are listed in two places: driver-side door placard & in the manual. I'll make it three places:

    • 225/40ZR18 - 32 psi (39 psi for max weight)
    • 255/35ZR18 - 38 psi (46 psi for max weight)
    Last edited by Crickett; 03-09-2011 at 07:32 AM. Reason: added heavy inflation pressures

    Travis | '04 ZHP sedan 6MT | WeĭssLĭcht AEs | BMW clears | Plasti-Dipped grilles | BMW Perf. intake | TMS Power Pulleys | DIY aux-in | !CDV
    Sprint Booster w/Sport button | Mich PS A/S 3 (245 sq) | M3 front sway | Z4M LCABs | Beisan VANOS rebuild | GAS DISA rebuild | BMW diag. PC

  3. #3
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    Thanks, I will be picking up mine this weekend and want to make sure I am driving 1300 miles on the correct tire pressure. Thanks again.

  4. #4
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    Quote Originally Posted by Crickett View Post
    The BMW-recommended pressures are listed in two places: driver-side door placard & in the manual. I'll make it three places:

    • 225/40ZR18 - 32 psi
    • 255/35ZR18 - 38 psi
    This.

    Though 2 BMW dealers told me 32psi all around was "fine"

  5. #5
    Quik, congrats on getting the 330 ZHP.

  6. #6
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    Quote Originally Posted by quikryptonite View Post
    Thanks, I will be picking up mine this weekend and want to make sure I am driving 1300 miles on the correct tire pressure. Thanks again.
    Not a problem. Congrats (in advance) for picking up a great car!

    Travis | '04 ZHP sedan 6MT | WeĭssLĭcht AEs | BMW clears | Plasti-Dipped grilles | BMW Perf. intake | TMS Power Pulleys | DIY aux-in | !CDV
    Sprint Booster w/Sport button | Mich PS A/S 3 (245 sq) | M3 front sway | Z4M LCABs | Beisan VANOS rebuild | GAS DISA rebuild | BMW diag. PC

  7. #7
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    Personally, I think 32 is too low, and running more in the rear with a staggered setup means even more understeer than the car already has built-in, way, way too much.

    UUC has a good tuning guide on their site which is impossible to find, but here's a direct link. It shows how different changes, including tire pressure, effect handling characteristics...

    Setup of the Sway Barbarian
    Jeff

    Golden Gate Chapter BMW CCA - Autocross - Join Us!


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  8. #8
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    Quote Originally Posted by jvr826 View Post
    Personally, I think 32 is too low, and running more in the rear with a staggered setup means even more understeer than the car already has built-in, way, way too much.

    UUC has a good tuning guide on their site which is impossible to find, but here's a direct link. It shows how different changes, including tire pressure, effect handling characteristics...

    Setup of the Sway Barbarian
    That link is great info for the novice tuner / autoX'r! I never could remember that stuff on a track day . . .

    Also, keep in mind 32/38 is BMW's every day / average-use recommended pressure; pressures for the track / autoX course is another matter entirely.

    Travis | '04 ZHP sedan 6MT | WeĭssLĭcht AEs | BMW clears | Plasti-Dipped grilles | BMW Perf. intake | TMS Power Pulleys | DIY aux-in | !CDV
    Sprint Booster w/Sport button | Mich PS A/S 3 (245 sq) | M3 front sway | Z4M LCABs | Beisan VANOS rebuild | GAS DISA rebuild | BMW diag. PC

  9. #9
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    Quote Originally Posted by Crickett View Post
    The BMW-recommended pressures are listed in two places: driver-side door placard & in the manual. I'll make it three places:

    • 225/40ZR18 - 32 psi (39 psi for max weight)
    • 255/35ZR18 - 38 psi (46 psi for max weight)
    The door jamb doesn't say if that weight is for max load, it just says that those are the pressures when cold. I run these pressures all the time. Where did you see it say that's the "max weight" pressure?
    BP
    2005 330i ZHP / 6MT
    Imolarot / Naturbraun



    It's not the car you drive, it's how you drive it.

  10. #10
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    Autozone.com
    I run 36.5 front and 39.5 rear at driving temps. Never had uneven tire wear from it at all. and i run 235/255, but also ran 235/265 on same pressures.

    Sent from my DROID2 GLOBAL using Tapatalk
    Last edited by Mtnman; 03-09-2011 at 08:15 PM.
    "No, Donny, these men are nihilists, there's nothing to be afraid of"

    09 135i Msport 6mt
    04 330i ZHP (sold)
    David

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