Hood flapping
 

im trying to remedy the hood fluttering above 95 mph. i dont really want to put in aero hood latches on the side.

what are some other potions to this or should i just deal with it

Hood venting is the easiest way to get rid of the flutter

Deal with it, its normal. If you run an aftermarket hood then get aerocatch or similar quality latches.

Adjust it. It isn't hard to do.

Just use the oval holes in the latch to move it up a hair. Don't get carried away though or then it will be hard to open.
http://assets.suredone.com/2525/medi...-989981251.jpg

Down. Move it down a hair. Make sure your corner stops are adjusted accordingly. It's not normal. My hood's rock solid up through a buck fifteen.

Yes down. Not sure why I said up. Must have thought it was an Australian car.

You were still shocked at 600 ppm molybdenum. :rolleyes:

What if you are at the bottom and still get flutter?

600 and I wouldn’t bat an eye. It was 1033 against an average of 189 and yes that is huge.

Hammer the bar on the hood up. Yes this time it would be up.

Would have to figure out what's different. I've never even seen it.

No, 600 and 1000 are two samples of the concentration in the first fill with assembly lube. It's not even remarkable to me.

The product called Liquid Moly is 180 and that is considered high.
Assembly lubes can go as high as 400 and should be diluted from there.
The samples posted are well above that.
My point remains that the guys that run home with their new car and drain out all that “crap” initial fill shouldn’t be in such a rush.
https://www.liqui-moly.com/fileadmin...Molygen_EN.pdf

Corner stops are way off.

my corner stops are loose.

think my hood bent itself

Ah! I see your point! [/threadjack]
I have known about this hood flapping effect since the very beginning and with all the meets I've attended, never thought to ask others in person.

Do the hood and fender lines match? Mine do nicely. Is it possible that the front clip is high? I'm talking about the hardware that screws together over the radiator and such. Not sure if I'm using the right terms.

I can’t see my hood while driving. Problem solved.

My hood matches the fender down the sides. By "flapping" I see more of a vibration visible at the passenger side edge of the hood. I either need to be looking for it, or the sun needs to be reflecting off the edge of the fender just right. I think for a while I had my hood stops a bit too high and maybe the front corners warped a bit over time?

My eventual solution will be latches and/or vents, but I'm procrastinating to see how much I actually want to mod the frs lol. 9 years and counting...

my hood doesn't 'flutter' or 'flap' per se.

the sides of the hood forward of the strut humps will visibly raise up from the quarter panels about a 1/4"-1/2" at any speed over about 45mph. air is definitely running over the top of the headlights and raising up the hood

lately i've noticed that the hood towards the front is about 1/8" raised over the side panels, and i could've sworn it was closer to flush/even when i originally got the car.

my plastic front bumper, i've got no issues with alignment with the hood for that. but my plastic bumper cover is also pretty loose from curb strikes, so any alignment issues there are pretty easily faulted elsewhere.

Is this Moly concentration in Engine oil? In UK we have a very popular oil brand called Millers and this is their used oil sample analysis for my car. I have a few more, always Moly around 1000 PPM. Attachment 214655

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THIS IS NOW A BITOG THREAD
 

https://i.imgur.com/pznkynrl.jpg



Maybe the corner stops are too high. I've never tried to see how far I can lower mine before they no longer touch the hood when latched. Hmmm...

Double check that the small rubber bumpers out on the edges of the hood are adjusted too. These can help with fluttering out near the sides.

Maybe slow down? :P

Looks pretty stable in this video, but maybe it is not showing the area that flutters?

https://youtu.be/kC8Lrz8PAlM?t=121

Though I have to admit, I always wondered about this gap above the headlamp and if it was sealed off to air flow or not. If not, maybe that is the issue?

(Yeah, I know the frontbumper is not fitting correclty in this photo, but it was the best one I could find quicklyh to show the gap I described)

There are seals, little angled flappy things mounted to the underside of the hood to route the air around the corners. I don't know how effective they are or if they're even in play here.

Stone. Guards. ;)

...I'll see myself out...

Raise the corner stops. Too low it will flutter, too high it’ll look stupid. All about finding that middle ground.