500 Madness
 
Page 1 of 6 1 2 3 ... LastLast
Results 1 to 10 of 58

Thread: High speed braking=SCARY

  1. #1
    Junior Member
    Join Date
    Aug 2013
    Location
    Brooklyn NY
    Posts
    22
    Thanks
    3
    Thanked 0 Times in 0 Posts

    High speed braking=SCARY

    K so I was driving kind of fast the other day (90-95) when someone going the speed limit (50) decided to switch lanes. Long story short I had to brake pretty hard and it scared the **** out of me. The car felt so wobbly and just unstable. I was extremely dissapointed by this experience and to be honest don't feel very confident behind the wheel anymore. Is this normal? Has anyone else experienced thks? Hoping there is a quick fix for this (lowering?) Thanks

  2. #2
    Guest
    Join Date
    Jun 2011
    Posts
    1,411
    Thanks
    179
    Thanked 309 Times in 243 Posts
    Quote Originally Posted by Vlavsky View Post
    K so I was driving kind of fast the other day (90-95) when someone going the speed limit (50) decided to switch lanes. Long story short I had to brake pretty hard and it scared the **** out of me. The car felt so wobbly and just unstable. I was extremely dissapointed by this experience and to be honest don't feel very confident behind the wheel anymore. Is this normal? Has anyone else experienced thks? Hoping there is a quick fix for this (lowering?) Thanks
    Dead easy fix mate....

    Drive at a sensible speed for the safety of yourself and other road users and save this **** for the track!

    Oh yeah, welcome to the forum!

  3. The Following 3 Users Say Thank You to Guest For This Useful Post:

    EugeneS (09-10-2013), hownowcb (09-11-2013), onederer (09-09-2013)

  4. #3
    Senior Member
    Join Date
    Apr 2013
    Location
    Fort Worth, TX
    Posts
    140
    Thanks
    15
    Thanked 23 Times in 23 Posts
    MY braking has been of a quality high varied due to road conditions. I drive acccordingly, and do not consider the berakes to be any worse than good...but they aren't great either.

    Quick fix, change brake pads to a more performance pad...if you are willing to accept more brake dust, reduced pad and rotor life, and the need to properly warm the pads for best performance. Lowering would likely make braking worse, as it reduces suspension travel, and your wobble is probably road condition (crappy roads, uneven, etc) related.
    Last edited by DuckDodgers; 09-09-2013 at 10:37 PM.

  5. #4
    Moderator Robert Nixon's Avatar
    Join Date
    Aug 2012
    Location
    Virginia Beach, VA, United States
    Posts
    4,010
    Thanks
    989
    Thanked 1,163 Times in 801 Posts
    haven't noticed any issues in autcrossing or at the Abarth Experience, although neither one involves HARD braking from 95.

    Top speed on the track at Abarth Experience was about 86 down to maybe 40 for a corner. No issues.

  6. #5
    All 101HP all the time Lifetime Member Felnus's Avatar
    Join Date
    Sep 2011
    Location
    Virginia
    Posts
    1,304
    Thanks
    162
    Thanked 523 Times in 328 Posts
    It's a short wheelbase car, the rear will unload under panic braking but the ESC and anti-lock brakes should keep you pointed in the right direction which is what you felt, the car battling physics to keep itself and you in one piece. 45 mph over the speed limit is asking for something bad to happen. Slow down before something life altering occurs and a squirrelly rear end is the least of your worries.

  7. The Following 9 Users Say Thank You to Felnus For This Useful Post:

    DuckDodgers (09-11-2013), EugeneS (09-10-2013), hownowcb (09-11-2013), luckymoi (09-09-2013), Mini Cord (09-09-2013), onederer (09-09-2013), paook (09-09-2013), SailDesign (09-12-2013), SeaDawg (09-10-2013)

  8. #6
    Senior Member
    Join Date
    Aug 2013
    Location
    Vallejo, CA.
    Posts
    210
    Thanks
    11
    Thanked 49 Times in 39 Posts
    You were doing 95 in a 50, and the "dangerous little car" kept you going in the proper direction without plowing into an innocent person driving like an adult. It worked fine, and you need to cut that **** out.
    2013 Abarth Cabrio, Nero w/ Rosso stripes/mirror caps, Nero cloth, Comfort & Convenience, Beats, clear bra, Turbo tails, Platypus front plate holder, Tributo Ferrari key fob

  9. The Following 3 Users Say Thank You to JoeB For This Useful Post:

    catman2130093 (04-01-2014), EugeneS (09-10-2013), onederer (09-09-2013)

  10. #7
    Member AnthonyV's Avatar
    Join Date
    Sep 2013
    Location
    Sun Valley
    Posts
    97
    Thanks
    14
    Thanked 50 Times in 23 Posts
    Totally agree with what others have said about minding speed on the highway, and using caution to not put others lives in danger as well as your own.

    That said, I think I've actually experienced the feeling OP is talking about, actually at much lower speeds as well. I think it's a issue of weight transfer. For me it's happened right at about the threshold of braking before a turn. Probably just short of engaging ABS. Being front weight biased and having a really short wheelbase definitely exacerbates the feeling. For me it wasn't a uncontrollable violent feeling or anything, just that the car felt like the rear got a little nervous feeling for a second, and still being a bit new to the cars handling characteristics at the time, was also a little nervous myslef for a second lol. The car sorted itself out though before any input on my part was necessary. But I could see how it might unsettle someone if they didn't expect it.

    I think what's happening is the rear of the car is getting very unloaded under fast sharp braking. From my experience though, the rear only does it's little wiggle when it happens over uneven or somewhat rippled pavement. Since there's so little weight back there, the wheels are light for the second, and is easier for them to follow all the imperfections in the road.

    Under normal driving, you'd just about never notice it. Under hard driving or in a panic situation on sort of grooved or rippled pavement is the only time it rears it's head. I would say the solution is dampers with more low speed rebound damping in e rear, or more low speed compression damping in front. I'd personally probably opt for low the low speed rebound in back, I like bump damping to be compliant. It would slow the weight transfer under extremely hard braking. i imagine any kind of uprated damper would probably sort this.

    All that said, it's hardly any kind of deal breaker for me. This car handles excellently! Like I said, the car sorts itself for the most part before it ever really "gets out of shape". The only place I could see it being a issue is if the driver did something erratic, or over reacted when it happened. As is, nothing is really needed to compensate other then just keeping the steering wheel straight, which is what you want under threshold braking anyway.

  11. #8
    Senior Member
    Join Date
    Aug 2012
    Location
    san diego, ca
    Posts
    496
    Thanks
    141
    Thanked 60 Times in 55 Posts
    dude, you where driving too slow. if you would had gone faster. you would had pass the idiot. lesson learn. hah.

  12. #9
    Guest
    Join Date
    Oct 2012
    Posts
    1,503
    Thanks
    347
    Thanked 516 Times in 337 Posts
    The speed issue aside, if you are that aggressive of a driver then some mods are a definite requirement. Better rotors & pads. Braided, stainless steel brake lines. Rear torsion bar. Lowering springs or coil-overs (good ones)

  13. #10
    Senior Member jguerdat's Avatar
    Join Date
    Jul 2012
    Posts
    1,469
    Thanks
    62
    Thanked 271 Times in 221 Posts
    I've never felt the car "wobble" under heavy braking until I went to the Abarth Experience which was my first track experience. Most folks were prolly doing more coasting than braking but I wanted to see what was up so I used my autocross braking (wait till you see God, then brake) or at least as much as I could with the instructor giving orders. The car was definitely moving around under heavy braking which wasn't unnerving to me, just a datapoint that a short, tall wasn't going to be as stable as a car with a different CG. It was also obvious that my huge rear torsion bar would be an issue on the track, since rotation was much easier than at autocross speeds.

    Long story short, depending on speed, tires and road conditions (including smoothness and rain grooves) the car may very well move around/wobble under heavy braking.

    P.S. Don't do that again.
    Jeff Guerdat

    2013 Fiat 500 Abarth
    1970 Fiat 850 Spider
    2016 Cadillac ATS-V 6 speed manual

  14. The Following User Says Thank You to jguerdat For This Useful Post:

    catman2130093 (04-01-2014)

Page 1 of 6 1 2 3 ... LastLast

Similar Threads

  1. High Speed Driving
    By Sam Hill in forum Questions about the Fiat 500
    Replies: 19
    Last Post: 10-29-2014, 07:18 PM
  2. Left-Foot Braking Causing "Limp Mode?"
    By Mr. Man in forum Fiat 500 ABARTH Issues and Concerns
    Replies: 32
    Last Post: 10-02-2014, 07:12 AM
  3. What's TOP SPEED?
    By SLOWAbarth in forum Fiat 500 ABARTH Engine and Drivetrain Tuning
    Replies: 49
    Last Post: 04-28-2014, 02:48 PM
  4. Fiat wins safety award for smart braking
    By Andree in forum Fiat news and reviews from around the Internet
    Replies: 1
    Last Post: 07-02-2013, 08:52 AM
  5. Hard to sell a used Fiat 500 Sport - Scary
    By Tazzel in forum Fiat 500 General Discussion
    Replies: 30
    Last Post: 08-10-2012, 11:17 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •