Rollover Risk? TTAC article says maybe

Discussion in 'Fiesta ST Autocross' started by Chuckable, Jul 2, 2015.

  1. Chuckable

    Chuckable Member

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  3. Zormecteon

    Zormecteon Active Member

    Interesting article, and good to know, but a few things stand out. I am always suspicious of a "news" article that is full of leading questions. In this case the "who are they protecting" string, with leading answers. While fine in an editorial article, his is a hallmark of bad journalism . To move on he mentions stickier tires, smaller wheels, and a novice driver as the contributing factors. The smaller wheels part is the one that gets my attention. I'm curious about the size of the side wall, as the percentage ratio has a great effect on sidewall flex, which could have caused "roll under" at the front corner of the car. The last thing - novice driver------------ I remember seeing film of the hatchet job done on the Jeep by consumer reports showing the rollover potential of the Wrangler. They had attached servos to the Jeep so that it could be remote controlled. They then took it through a "J" turn" at 40 mph and sure enough, the vehicle rolled onto its side. Jeep, after seeing the video and to defend its reputation had a human driver take the a similar course at the same speed. No problem even at 5 mph faster. The difference being the human feedback loop being able to correct for the slide and keep the car on course. Here we have the report a novice driver being unable to correct, not having enough experience to know the proper steering input for what (s)he should have been feeling through the seat of the pants and the steering wheel.

    Many of us on the forums have been through the Octane Academy and know how the car slides. Although I personally won't use my car in any kind of competition (that's how you break stuff!) I wouldn't hesitate to use the Fiesta ST for any competitive event with no worry about putting it on its side.

    CGv2 and RodMoe like this.
  4. Slowclimb

    Slowclimb Active Member

    They do seem to bicycle more than others and the standard fiesta was made ineligible for autocross in stock form. I autocross mine a lot, but I do so with the knowledge that the car has this tendency and try to drive accordingly.
  5. eRic

    eRic Active Member

    my comments are posted. I don't think there's a problem with OE tires or OE size tires on the OE suspension. mine three wheels but I've never been on two wheels in the two dozen autocross and track event that I did on OE tires or the half dozen autocross and track event I did on OE size Falken RT-615K. I think the problem could occur with taller tires that effectively raise the ride height and soften the spring rate. I've watched other FiST run and saw three wheeling but that's about it. The tires on the STOA FiST were less grippy than OE tires so they would slide easier and last longer. Of course the 215/45-17 Bridgestone RE71R is the grippy tire of choice on the FiST but it would be great if they made it in a 205/40-17.
  6. k757

    k757 Active Member

    I am not concerned about the ST
    OTOH, I have seen a Mini Cooper S dance on 2 wheels as well as a 2009 Honda Civic EX sedan do 3 bounces on 2 wheels, which was kinda scary. Maybe I should write an article about those cars
    CGv2 likes this.
  7. Chuckable

    Chuckable Member

    Good to hear from experienced autocrossers. Thanks for posting your thoughts :)
  8. Slowclimb

    Slowclimb Active Member

    Like Kieth is not unique to the Fiesta...I heard about a Mazda 3 that completely rolled, but he was on r comps. Saw a cooper s on r comps 2 wheel as well. So, there are are other cars that have the same tendency.
  9. madhatter

    madhatter New Member

    And Saturns. And Evos. I've seen a lot of cars up on 2. We might as well be talking about the car's tendency to spin out, since it basically amounts to the same thing.

    But "roll over" makes for a better clickbait article title.
  10. Mightymango

    Mightymango Active Member

    Not concerned at ALL though I FINALLY experienced it myself on a severe off camber turn on a banked oval slalom.

    And really in that article.....REALLY??! The SCCA wanting to "hide the truth" How about NO.
    Last edited: Jul 20, 2015

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