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Old 09-15-2012, 10:48 PM   #1
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Default 400 wheel torque + hoosier slicks = ...



Didn't have my SLR with me on the track so you get a crappy iphone pic.

Things were going well up until I got on the gas after turn 11 at Laguna Seca. The back end kicked up as the hub sheered and the tire exited out the rear. Came back down on the rotor which snapped in half. As the car came to a rest I saw the wheel rolling by off into the sand trap. I'll have to get my friend's video who was right behind me. He didn't get it as the hub snapped, but you can see the wheel still rolling off.

Overall not too much damage, but without an extra rear hub and some welding gear + 2.5" exhaust pipe I had to take the car home. Getting it on the trailer was fun.







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400 wheel torque + hoosier slicks = ...-4d848c3a.jpg   400 wheel torque + hoosier slicks = ...-4e04ca84.jpg   400 wheel torque + hoosier slicks = ...-75d9308e.jpg   400 wheel torque + hoosier slicks = ...-199fac16.jpg   400 wheel torque + hoosier slicks = ...-11ac33ec.jpg  

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Old 09-15-2012, 10:58 PM   #2
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That's scary stuff right there. I always figured the hub nut would prevent that from happening? lol
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Old 09-15-2012, 11:03 PM   #3
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Whoa.......that's a man's Miata. I could've sworn this was going to be in a drag racing app after that first pic. How long had it been since you replaced the hubs before this?
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Old 09-15-2012, 11:22 PM   #4
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Dam, that's impressive! Glad to see it wasn't any worse like it could have been. Obviously you had no indication of it failing before it let go?
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Old 09-15-2012, 11:54 PM   #5
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...............


man status
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Old 09-15-2012, 11:55 PM   #6
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Factory hub? I have been considering pre-emptively swapping to the V8R hubs/axles.
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Old 09-16-2012, 12:12 AM   #7
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Factory hub - I think. I'll take a closer look tomorrow. The previous owner's notes said the bearings were replaced and studs were pressed in, but nothing about new hubs. I just e-mailed v8r to see if I can get a set of hubs from them.

No warning before it let go. Just happened as soon as I got on the gas.
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Old 09-16-2012, 02:02 AM   #8
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wow....
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Old 09-16-2012, 02:11 AM   #9
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Props for having huge nuts! Glad the car damage was minimal - now you have a baller story to tell.
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Old 09-16-2012, 02:20 AM   #10
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Yes. Wow.
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Old 09-16-2012, 04:43 PM   #11
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What's left of the hub after I pressed it out of the knuckle and pressed out the lugs. I guess it's not a stock hub. It's 26 spline, however the diameter is bigger. Only thing I could match it with was an escort zx2, but not sure if the spline size is right.

99516e57.jpg?t=1347824211
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Old 09-16-2012, 05:22 PM   #12
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I've seen this on a V8R car in Dallas.
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Old 09-16-2012, 05:30 PM   #13
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Holy hell. hope this isnt a common thing. Does this happen to the SM guys ?
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Old 09-16-2012, 05:39 PM   #14
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You are my hero.
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Old 09-16-2012, 07:28 PM   #15
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Quote:
Originally Posted by AllSystemsNominal View Post
Holy hell. hope this isnt a common thing. Does this happen to the SM guys ?
umm considering that SM guys dont run 400 whp on slicks im gonna have to say no. This looks to be just a to much torque and not enough give situation to me. Must have been a hell of a ride.
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Old 09-16-2012, 07:36 PM   #16
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I just love it when someone posts something like this right before I have a race weekend scheduled.
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Old 09-16-2012, 08:10 PM   #17
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Don't worry, you only have 399 torque, you'll be fine
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Old 09-16-2012, 10:16 PM   #18
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Good the car didnt get smacked up. That is a pretty cool failure. How does the other hub look?
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Old 09-16-2012, 10:17 PM   #19
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I'm sad.

Another reason for me to not go past 200 whp.
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Old 09-16-2012, 10:48 PM   #20
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The car is still on the trailer so I haven't had a chance to check the other hub. I was hoping to replace the broken one and drive the car off, but I haven't found a replacement that works. If no one wants to inspect the hub I might ghetto mig weld it back together so I can bolt on a wheel and push or drive it off.

2 and 11 exit are especially bad on the right side at Laguna as I'm in third gear (or second if I get stuck behind someone) and applying lots of throttle on exit. The back end always kicks out on those turns. Most of the right hand stuff is high speed except for the bottom of the corkscrew but there isn't isn't a lot of room before 9.
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