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Old 06-12-2007, 01:23 PM   #1
cooleyjb
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Default Check your lugs

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Old 06-12-2007, 01:25 PM   #2
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Oh snap!

CN: SM2 RX-7 looses all four wheels within first 50 yards of an autoX.
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Old 06-12-2007, 01:28 PM   #3
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just saw this on the GRM board..pretty funny
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Old 06-12-2007, 01:33 PM   #4
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I wonder how much the damages to the car cost.
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Old 06-12-2007, 01:49 PM   #5
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ooof
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Old 06-12-2007, 01:54 PM   #6
Protege Menace
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in the OT thread on this video it was pretty much decided that it wasnt because of loose lugs, but incorrect sized ones or oens that all sheared off .
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Old 06-12-2007, 01:57 PM   #7
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Quote:
Originally Posted by Impreza01 View Post
I wonder how much the damages to the car cost.
I wonder how they removed the car. Would probably have to literally drag it up onto a flatbed trailer.
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Old 06-12-2007, 02:09 PM   #8
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Quote:
Originally Posted by Protege Menace View Post
in the OT thread on this video it was pretty much decided that it wasnt because of loose lugs, but incorrect sized ones or oens that all sheared off .
I doubt a guy campaigning an SM2 RX7 with Enkei RPF-1s shod with D.O.T. R-compounds will pick incorrect lugnuts. As later mentioned in the thread, some of the members there are backtracking on the idea of sheared off lugnuts.
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Old 06-12-2007, 02:17 PM   #9
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Quote:
Originally Posted by Impreza01 View Post
I doubt a guy campaigning an SM2 RX7 with Enkei RPF-1s shod with D.O.T. R-compounds will pick incorrect lugnuts. As later mentioned in the thread, some of the members there are backtracking on the idea of sheared off lugnuts.
You can hear a guy in the video say "these lugs are the wrong size." That's probably where people are getting it from. At the speed that it happened, it would be impossible for that many studs to shear off... there has to be something else systematically wrong. I've seen cars break studs at an autocross, and even with 275 R-comps, it takes quite a bit to launch a wheel off a car... let alone all 4 at once!
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Old 06-12-2007, 02:18 PM   #10
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wow...I know this region..and race with them ever so often...The BSP Porsche in the background is my direct competition....and has co-driven my car on numerous occasions...

SM2 RX7..looks familiar....


sux for him..

Bill
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Old 06-12-2007, 02:25 PM   #11
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Quote:
Originally Posted by remowgn View Post
You can hear a guy in the video say "these lugs are the wrong size." That's probably where people are getting it from. At the speed that it happened, it would be impossible for that many studs to shear off... there has to be something else systematically wrong. I've seen cars break studs at an autocross, and even with 275 R-comps, it takes quite a bit to launch a wheel off a car... let alone all 4 at once!
Didn't listen to the audio. I was thinking along the same lines though. It's hard for all the lugs to shear off. I'm thinking what the guy did wasn't even finger-tightening the lugs, but just got enough for the lugs to catch thread. He probably thought it was going to hit them all with an impact gun or deep socket wrench later.
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Old 06-12-2007, 02:37 PM   #12
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Quote:
Originally Posted by Impreza01 View Post
Didn't listen to the audio. I was thinking along the same lines though. It's hard for all the lugs to shear off. I'm thinking what the guy did wasn't even finger-tightening the lugs, but just got enough for the lugs to catch thread. He probably thought it was going to hit them all with an impact gun or deep socket wrench later.
I tend to agree with you.
Still if they were that loose, you'd think you might hear it even while staging.
Wonder how they tech stuff there, if they have a season long tech program, I can see that getting through. If not, that should have been caught.

I feel bad for the guy....made a mistake and now its all over the interweb.

I'm assuming that was his first run of the day. If not, that would add a little more credibility to the bad lug nut argument.
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Old 06-12-2007, 03:42 PM   #13
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Hello all,
I was at the event and know the guy who owns the car. (No it wasn't me)
I was in the paddock area next to him changing wheels at the same time as him. I watched him torque all of them. I even borrowed his torque wrench to tighten mine (I always forget something after I get on the road).

He went to a wheel/tire business and asked for spline drive lug nuts for his particular make/model/year car for the Enkeis, and that's what they gave him. He did not purchase the tires or wheels from them, just the lug nuts.

The lug nuts where sheared off the studs. Several members lifted a corner of the car to slide a jack underneath it. With a few more jacks, blocks of wood, etc, they were able to mount the stock wheels and stock lugs nuts (at least 3 per wheel) back on, torque them and drive the car off course. The design of the car, possilbly for aerodynamics, tucks all mechanicals on the underside a little higher than the body line, or lowest part of the brake rotors. Not even the exhaust was really scratched.

I'm not a mechanic, but the mechanics theories there was that the lug nuts where the incorrect size, but they were just small enough to grip the outer edge of the threads (as I mentioned, they torqued to 75-80 ft/lbs without complaint).

Hopefully, the only damage is to the body and brakes.
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Old 06-12-2007, 04:56 PM   #14
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It is possible they gave him 1/2 nuts instead of the 12x1.5. the size difference is enough they may fit together but would have zero strength.
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Old 06-12-2007, 05:13 PM   #15
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That sounds very possible.
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Old 06-12-2007, 05:52 PM   #16
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Man that suxs!!!

I like how the video shows that he put his handbrake up after this all happened.
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Old 06-12-2007, 06:08 PM   #17
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Quote:
Originally Posted by boundy3 View Post
Man that suxs!!!

I like how the video shows that he put his handbrake up after this all happened.
the parking brake was a nice touch
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Old 06-12-2007, 10:28 PM   #18
nhluhr
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Quote:
Originally Posted by motoring View Post
It is possible they gave him 1/2 nuts instead of the 12x1.5. the size difference is enough they may fit together but would have zero strength.
Impreza lugs are M12x1.25.
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Old 06-13-2007, 08:38 AM   #19
IT Swift
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Quote:
Originally Posted by nhluhr View Post
Impreza lugs are M12x1.25.
So?

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Old 06-13-2007, 09:11 AM   #20
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Quote:
Originally Posted by nhluhr View Post
Impreza lugs are M12x1.25.
Quote:
Originally Posted by IT Swift View Post
So?

So all our impreza friends will not buy the wrong nuts after seeing that post.
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Old 06-13-2007, 12:21 PM   #21
jblaine
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I truly do feel for the guy, and maybe I am evil, but I laughed incredibly hard and loud at that video for a good solid minute.

Sucks. But damn funny in video form.
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Old 06-13-2007, 03:46 PM   #22
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Quote:
Originally Posted by wileecoyote View Post
So all our impreza friends will not buy the wrong nuts after seeing that post.
exactly. and yes, i understand that the person i quoted didn't say imprezas have 1.5's... but this is an impreza forum and stuff comes up in searches all the time.
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Old 06-13-2007, 08:00 PM   #23
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Odd that they all came off at the same time...

Feel sorry for the guy. Hopefully not too much was damaged.
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