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    • HPF M3 loses control at the strip

      We just received these videos of an HPF turbo M3 which lost control at the Irwindale 1/8 mile strip and ended up going into the wall. The car looks like it is running bias-ply slicks with radial street tires up front. This may have contributed to the driver losing control as the general rule is not to mix due to instability up top. Additionally, once the car starts to sway it looks like the owner stays in it and then tried to brake too late which causes him to lose it. Hopefully we will have more details on the car and the setup soon.






      This article was originally published in forum thread: HPF M3 loses control at the strip started by Sticky View original post
      Comments 195 Comments
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Blackbenzz Click here to enlarge
        Yup. I've been trying to tell this benz guy that for years but guess he knows better cuz he never listens. Says he breaks traction past the 1/8th mile in his NA car when we had 1000+whp supras there doing just fine.
        What do you run up front with your slicks?
      1. SSDD's Avatar
        SSDD -
        I'm not sure of hit set up but here is a pick of his car at MIR. Appears to be slicks all around

        Click here to enlarge

        and another cool shot, color looks totally different in the direct sun

        Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SSDD Click here to enlarge
        I'm not sure of hit set up but here is a pick of his car at MIR. Appears to be slicks all around

        http://www.bimmerboost.com/images/im...DSC_0024-1.jpg
        And that is what people should take away from this thread, that is how it should be.
      1. BattaM3's Avatar
        BattaM3 -
        So if I get MT et streets I should get all four?
      1. nickr519's Avatar
        nickr519 -
        Click here to enlarge Originally Posted by BattaM3 Click here to enlarge
        No it wasnt chris who said it first. It was that forcefed guy. Chris chimed in later tho.
        Why do so many so heavily criticize the fact those that claimed the diff had something to do with it? Are you guys really to believe that ONE factor (the tires) was the SOLE cause of this incident and no other factors as explanations are relevant? Click here to enlarge
      1. BattaM3's Avatar
        BattaM3 -
        I believe there was a couple things that resulted in the crash but I'm no expert.
      1. GG///M3's Avatar
        GG///M3 -
        Click here to enlarge Originally Posted by BattaM3 Click here to enlarge
        So if I get MT et streets I should get all four?

        No just rears, but do not drive them in the rain. It will = wall
      1. GG///M3's Avatar
        GG///M3 -
        Click here to enlarge Originally Posted by nickr519 Click here to enlarge
        Why do so many so heavily criticize the fact those that claimed the diff had something to do with it? Are you guys really to believe that ONE factor (the tires) was the SOLE cause of this incident and no other factors as explanations are relevant? Click here to enlarge
        You must not know much. Tires played a major major role. He shouldn't have been allowed on the track honestly.
      1. BattaM3's Avatar
        BattaM3 -
        Word GG. I don't think I'm getting any MT. Watch the video of the crash. It looks like a control arm might of snapped Also. Couple others saw this to but it just to hard to tell.
      1. BattaM3's Avatar
        BattaM3 -
        I'm still a little confused about this tire thing. I though they said don't mix 2 types??
        I got to burn these bridgestone re11 before I get new stuff.
      1. GG///M3's Avatar
        GG///M3 -
        Click here to enlarge Originally Posted by BattaM3 Click here to enlarge
        I'm still a little confused about this tire thing. I though they said don't mix 2 types??
        I got to burn these bridgestone re11 before I get new stuff.
        The guy who crashed used true racing slicks bias ply without having the skinny's up front. Now the M/T streets that are drag radials which can be used with street tires because they are radial tires without issues. I would get some really good street tires like the falken azenis 615k's on the stock rims or 17's with 275/50/17's or 275/45/17's and rape.
      1. BattaM3's Avatar
        BattaM3 -
        I understand now. Thanks. Didn't realize he was on a slick.
        I like bridgestone re11. They hook ok only driven on pump gas mode tho.
        After new suspension I'll be getting 18s.
      1. BattaM3's Avatar
        BattaM3 -
        If I could do 18-40-275 I'd like that. I might try it
        once I get a set off 18s. Might work with some fender mods. Other wise I'll just do 35 all around.
      1. GG///M3's Avatar
        GG///M3 -
        Click here to enlarge Originally Posted by BattaM3 Click here to enlarge
        If I could do 18-40-275 I'd like that. I might try it
        once I get a set off 18s. Might work with some fender mods. Other wise I'll just do 35 all around.
        Have Max Psi roll your rear fenders.
      1. BattaM3's Avatar
        BattaM3 -
        That what I was thinking. My main concern right now
        is suspension. My setup sucks. I'm having maxpsi or matt@cambertoe
        do install. Then it's either 18in apex arc8 or ccw c2k. Depends on my money. Nicer weather means more money for me.
      1. nickr519's Avatar
        nickr519 -
        Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
        You must not know much.
        sure smart guy Click here to enlarge thinking that the differential has nothing to do with this happening, which is what you were saying earlier, regardless of the role of the tires, is laughable. On the other hand, how did this guy even pass tech inspection with that tire combination, is this track known to be lax?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by BattaM3 Click here to enlarge
        So if I get MT et streets I should get all four?
        Depends on if you get the bias-ply or the radial.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by nickr519 Click here to enlarge
        Why do so many so heavily criticize the fact those that claimed the diff had something to do with it? Are you guys really to believe that ONE factor (the tires) was the SOLE cause of this incident and no other factors as explanations are relevant? Click here to enlarge
        No one is claiming anything along the lines of it being only one factor simply that elevating the diff above all others is stupid, because it is.

        If you drag race frequently or even know how a diff works you realize the diff was not the factor here. Let's not confuse a diff sales pitch with what the major factors really were.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by nickr519 Click here to enlarge
        sure smart guy Click here to enlarge thinking that the differential has nothing to do with this happening, which is what you were saying earlier, regardless of the role of the tires, is laughable. On the other hand, how did this guy even pass tech inspection with that tire combination, is this track known to be lax?
        You can pass tech inspection with bias-ply in the rear. It is not recommended, but you are taking your safety into your own hands. As stated earlier, some guys run bias-ply in back with radials but mixing and matching is definitely a general no-no. Some guys get away with a bias-ply in back with a radial up front but never run a bias-ply up front and radial in back, that will always spell disaster.

        I'm not sure if you understand how a diff works but it was not the factor here. As you can see he got heat in both tires and he is running an LSD to begin with. Even if he wasn't and open diff and an LSD on the strip work in basically the same manner and it is really corners were you see it in serious action, it wasn't the contributing factor here. Driver error + a poor setup were the causes.
      1. nickr519's Avatar
        nickr519 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You can pass tech inspection with bias-ply in the rear. It is not recommended, but you are taking your safety into your own hands. As stated earlier, some guys run bias-ply in back with radials but mixing and matching is definitely a general no-no. Some guys get away with a bias-ply in back with a radial up front but never run a bias-ply up front and radial in back, that will always spell disaster.

        I'm not sure if you understand how a diff works but it was not the factor here. As you can see he got heat in both tires and he is running an LSD to begin with. Even if he wasn't and open diff and an LSD on the strip work in basically the same manner and it is really corners were you see it in serious action, it wasn't the contributing factor here. Driver error + a poor setup were the causes.
        While your patronizing tone just reeks of elitism, I'll bite anyway. I must comment, yes I'm an electrical engineering student but I couldn't be f*cked to have any idea how a differential works, you got me bud Click here to enlarge Who elevated the diff as a factor above all else? Chris clearly stated in the post on e46F that the the tire mix was a no no, and added that the differential may have been a factor as well. Again with "the factor" you write like this incident was caused by one factor, and you seem to be implying all differentials behave in exactly the same way under load, both of which I'm sure you know better than. Certainly driver error and a poor setup were large factors at play, but you're smarter than that. Even if you do come off as a bit of a dick Click here to enlarge

        Anywho, I did not know that you could pass tech inspection with that tire combination. While you're certainly taking your own safety into your own hands, as was seen by the relatively close call in the video the safety of the other parties involved are also at stake, isn't that kind of the fundamental idea behind tech inspection? Click here to enlarge