Front end vibration & hood flutter - Mustang Evolution

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Old 10-17-2013, 09:54 PM   #1
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Front end vibration & hood flutter

So I got my car up to 165 the other day which is the fastest I've ever had it (closed road of course) and just drove it for the first time since then. Crazy I know. Our cars aren't built to go this fast aerodynamically, it's unsafe, I'm an idiot, blah blah blah blah, I know. Not asking for parenting. Anyways, my hood now shakes (flutters) when I get above 80. My front end seems to shake too which I might be feeling due to the hood. I thought it could maybe my tires or driveshaft thrown off balance. Any thoughts?
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Old 10-17-2013, 11:06 PM   #2
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Has the high speed twisted your hood at all.?
Is your hood still aligned up with the fenders and level
with the front grill?

I think the front end vibration could be just something
as simple as a tire out of balance.At that speed you
might have lost one of the balancing weights
that are stuck on.

Have a look and see if there are any loose bolts.
Are your tires rated to go that fast?
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Old 10-18-2013, 09:25 AM   #3
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Hood is still perfectly tight and aligned. I think it might be the air damper causing more and unbalanced air pressure under the hood.
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Old 10-18-2013, 11:43 AM   #4
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You probably bent, twisted something or possibly pulled out a few clips that hold on the body panels. Or like mentioned above lost a weight on your rim and now your tire is out of balance.

Not giving any parenting, as you did it on a closed course in a safe environment, and its your car. But this is a good example out there for others, that these cars are not aerodynamically sound to travel at those kind of speeds.
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Old 10-18-2013, 01:57 PM   #5
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That's odd that it flutters if it's latched down. There's a ton of explanations for the vibrating, as have been stated, but if it's really latched down, how is it fluttering?
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Old 10-18-2013, 05:51 PM   #6
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Quote:
Originally Posted by DeJoe8 View Post
That's odd that it flutters if it's latched down. There's a ton of explanations for the vibrating, as have been stated, but if it's really latched down, how is it fluttering?
Found the problem. It's fluttering because of the turbulence in the engine bay. Too much air is flowin through and these hoods are aluminum so they flex.

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Old 10-18-2013, 08:10 PM   #7
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You must have bottomed out pretty good something to do that, unless it ripped off at 160 which I doubt.
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Old 10-18-2013, 08:25 PM   #8
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Nah dude, I'm positive I didn't bottom out. It was the wind at 165...may have even been 170 haha.
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Old 10-18-2013, 09:37 PM   #9
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Did you buy your car new? Sure you didn't bottom out before or after the run? I cant see wind even at 165 ripping it off like that.
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Old 10-18-2013, 11:52 PM   #10
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Quote:
Originally Posted by BlackBetty5.0 View Post
Did you buy your car new? Sure you didn't bottom out before or after the run? I cant see wind even at 165 ripping it off like that.

Whatever dude. That's what causes it.

---------- Post added at 11:52 PM ---------- Previous post was at 11:52 PM ----------

And yea I bought it new.
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Old 10-19-2013, 01:10 AM   #11
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Caused***
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Old 10-19-2013, 03:26 AM   #12
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Alright just tryin to help you figure out why it happened, I got mine just shy if 150 MPH and didn't have any problems like you had. However I will say they are certainly not the most aerodynamic cars around like you said, it gets a little sketchy at those speeds. Still fun gettin there though.
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Old 10-20-2013, 09:27 PM   #13
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OP, this is the second time I heard of this happening. A guy on another forum had a failure of the exact same component at high speed and experienced the same symptoms that you did. I think he removed the damaged part and the vibration went away.
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