i have problem! hydro-planning and wierd acting on uneven surface!

kkoma1030 · Thu, Nov-15-2007, 06:31:29 AM

i just bought 2003.5 m3 vert.
it hydro-planing real bad in rain
i was going 75mph which i usually do on freeway with my is-250, i feel like my m3 will spin out. it's not only feel weird in rain but also in normal condition road specially on the freeway! accelating between 50~70mph i feel a lot of vibration from rear! but when i gunning it, i don't feel that vibration some how!
another thing is when i go over lil bumpy road, it feel like rear end acting like it want to follow the trail of uneven surface road
i checked my tires, it was fine!
help plz! help!

p.s. i am sorry about my english, i'm not a native speaker

**John_T** · Thu, Nov-15-2007, 07:09:37 AM

Well, too little tread or too wide tires not of good design can give you hydro-planing. Your tread depth may still be legal, but that by long doesn't mean they are still good.

If one or both of your rear tires is out of balance, it will give you the kind of vibrations you describe.

It sounds like there are a number of things wrong with your tire setup. Either give us more exact information about the tires on your car, or take it to a real tire expert you can trust.

daytonaviolet · Thu, Nov-15-2007, 07:24:00 AM

i agree with john_t. check your tire depth and balance, while your at it.. check your alignment too.

kkoma1030 · Thu, Nov-15-2007, 07:33:11 AM

coule be you guys rite!
i found out maybe i have RTAB problem

**DROPTOPKINGM3** · Thu, Nov-15-2007, 10:29:44 AM

Correct me if I'm wrong here. Isn't the is250 all wheel drive? Maybe that's the reason why the your other car never hyrdoplained and your M3 did?

**John_T** · Thu, Nov-15-2007, 10:56:16 AM

I don't think AWD would make a difference on hydroplaning, with worn tires it could even be worse.

biglar · Thu, Nov-15-2007, 11:18:08 AM

the IS 250 is AWD?

Anyways, i bet its your thread. I used to have an A4 Quattro. When my thread wore out, it was like driving on ice.

jacclark · Thu, Nov-15-2007, 09:05:26 PM

check your FCAB - if it's worn, you'll find the car tracks erratically on uneven pavement etc.

Thu, Nov-15-2007, 06:31:29 AM	#1
kkoma1030 Registered User Join Date: Sep 2004 Posts: 37 Reputation: 0	i have problem! hydro-planning and wierd acting on uneven surface! i just bought 2003.5 m3 vert. it hydro-planing real bad in rain i was going 75mph which i usually do on freeway with my is-250, i feel like my m3 will spin out. it's not only feel weird in rain but also in normal condition road specially on the freeway! accelating between 50~70mph i feel a lot of vibration from rear! but when i gunning it, i don't feel that vibration some how! another thing is when i go over lil bumpy road, it feel like rear end acting like it want to follow the trail of uneven surface road i checked my tires, it was fine! help plz! help! p.s. i am sorry about my english, i'm not a native speaker __________________ 2001 white honda accord coupe (I-4, auto) SOLD 2002 white acura rsx type-s (I-4, manual) SOLD Mods - intake, header, spring, type-r wing, and exhuast 1/4 mile: 14.6sec 2004 black infiniti G35 coupe (v-6, manual) SOLD Mods - 19inch Volk TE37 1/4 mile: 14.4sec 2002.5 blue audi S4 (v-6 TT, manual) SOLD Mods - cat-back exhaust 1/4 mile: 13.7sec 2006 white honda s2000 (I-4, manual) SOLD Mods - 18inch volk CE28, intake and exhaust 1/4 mile: 14.2sec 2006 white Lexus IS-250 (v-6, auto) owned 2003.5 Jet-black M3 vert. (I-6, manual) owned Mods - not yet 1/4 mile: soon!

Thu, Nov-15-2007, 07:09:37 AM	#2
John_T Moderator Join Date: Mar 2005 Posts: 15,627 Reputation: 578 Location: Switzerland	Well, too little tread or too wide tires not of good design can give you hydro-planing. Your tread depth may still be legal, but that by long doesn't mean they are still good. If one or both of your rear tires is out of balance, it will give you the kind of vibrations you describe. It sounds like there are a number of things wrong with your tire setup. Either give us more exact information about the tires on your car, or take it to a real tire expert you can trust. __________________

Thu, Nov-15-2007, 07:24:00 AM	#3
daytonaviolet OEM CSL Whoore Join Date: Jan 2004 Posts: 21,023 Blog Entries: 1 Reputation: 0 Location: Bay Area, California	i agree with john_t. check your tire depth and balance, while your at it.. check your alignment too. __________________ Click my sig and view my pics! Tischer aka GetBmwParts VCSL - Bumper DIY VCSL - Bootlid DIY FS: Rear black door panels FS: Oem trunk

Thu, Nov-15-2007, 07:33:11 AM	#4
kkoma1030 Registered User Join Date: Sep 2004 Posts: 37 Reputation: 0	coule be you guys rite! i found out maybe i have RTAB problem __________________ 2001 white honda accord coupe (I-4, auto) SOLD 2002 white acura rsx type-s (I-4, manual) SOLD Mods - intake, header, spring, type-r wing, and exhuast 1/4 mile: 14.6sec 2004 black infiniti G35 coupe (v-6, manual) SOLD Mods - 19inch Volk TE37 1/4 mile: 14.4sec 2002.5 blue audi S4 (v-6 TT, manual) SOLD Mods - cat-back exhaust 1/4 mile: 13.7sec 2006 white honda s2000 (I-4, manual) SOLD Mods - 18inch volk CE28, intake and exhaust 1/4 mile: 14.2sec 2006 white Lexus IS-250 (v-6, auto) owned 2003.5 Jet-black M3 vert. (I-6, manual) owned Mods - not yet 1/4 mile: soon!

Thu, Nov-15-2007, 10:56:16 AM	#6
John_T Moderator Join Date: Mar 2005 Posts: 15,627 Reputation: 578 Location: Switzerland	I don't think AWD would make a difference on hydroplaning, with worn tires it could even be worse. __________________

Thu, Nov-15-2007, 10:29:44 AM	#5
DROPTOPKINGM3 Banned Join Date: Aug 2005 Posts: 756 Reputation: 0 Location: New York	Correct me if I'm wrong here. Isn't the is250 all wheel drive? Maybe that's the reason why the your other car never hyrdoplained and your M3 did?

Thu, Nov-15-2007, 11:18:08 AM	#7
biglar Registered User Join Date: Jul 2006 Posts: 180 Reputation: 0 Location: Irvine	the IS 250 is AWD? Anyways, i bet its your thread. I used to have an A4 Quattro. When my thread wore out, it was like driving on ice. __________________ 2005 Silver Grey Metallic M3 6MT 1991 318i 5MT with 4.10 LSD 1997 Civic CX Hatchback (DD)

Thu, Nov-15-2007, 09:05:26 PM	#8
jacclark Registered User Join Date: Apr 2007 Posts: 953 Reputation: 0 Location: Montreal	check your FCAB - if it's worn, you'll find the car tracks erratically on uneven pavement etc. __________________ '04 e46 TiAg M3 \| TCKline DA SA 500 600 \| TMS Sways \| Brembo BBK \| 18" SSR Comps \| K&N 63 \| Autosolutions Shifter \| TMS Subframe Reinforcement \| Powerflex RTABs FCABs \| \| JB Racing LTW Flywheel \| Recaro Sportster CS Seats \| JVT-R Headers \| Magnaflow Exhaust \| TMS Pulleys \| TMS Software \| RE Tranny Motor Mounts \| \| Angel Eyes \| 6k D2S \| HID Fog Lights \| CSL Diffuser, Trunk and Splitters \| Custom Alum Lightweight Rear Seat Delete \| Thanks to: Obioban and Dan Law at DER Motorsports Modification Recommendations: http://www.m3forum.net/m3forum/showthread.php?t=314627

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