Hood of my 2007 Mustang starts to shake up and down at 80mph?
I noticed when I went to a new straight road in town that wasnt open but built, I was haulin ass down the road. After I was hitting 80+, my hood started to shake up and down, it was acting like it wanted to come off. Can anyone help with this? SHould I take it to a dealership to have it looked at? thanks
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Hood pins. You know the real ones, not the cosmetic ones lots of new cars have on them. If you look at the install Saleen does on the Parneli Jones model. Thats what I'm talking about.
I noticed when I went to a new straight road in town that wasnt open but built, I was haulin ass down the road. After I was hitting 80+, my hood started to shake up and down, it was acting like it wanted to come off. Can anyone help with this? SHould I take it to a dealership to have it looked at? thanks
Yes you can take it to the dealership and have them adjust the hood stops. There seems to be some pressuer build up under the hood at speed which makes the hood dance around. Hood pins are a good idea if that is the look and you feel is needed.
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I noticed when I went to a new straight road in town that wasnt open but built, I was haulin ass down the road. After I was hitting 80+, my hood started to shake up and down, it was acting like it wanted to come off. Can anyone help with this? SHould I take it to a dealership to have it looked at? thanks
You want to see it dance? Go 120+ Adjust all you want it will still do it.
That car has a LOT of high pressure build up under the hood with nowhere to go.
Its why the GT500 has funcitonal vents in the hood (plus that sucker generates a lot of heat, which is another reason).
If you check out the modifications made by Saleen, Rousch and CDC, they all seek to address this problem at some point.
Part of the problem is the relative flexibility of the Aluminum hood.
Hood pins if you aren't going to go to max top speed would be an excellent idea (and they look cool too, imo).
I actually think a Shaker kit (which involves cutting a big hole in the center of the hood) is a solution that's both functional (it generates additional power, efficiency and cooling) and great looking. Its also a very traditional look that goes with the car's overall design.
CDC (Classic Design Concepts) makes a good kit.
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tripleblack
"You can never be free until you let yourself go."
I actually think a Shaker kit (which involves cutting a big hole in the center of the hood) is a solution that's both functional (it generates additional power, efficiency and cooling) and great looking. Its also a very traditional look that goes with the car's overall design.
CDC (Classic Design Concepts) makes a good kit.
I just picked up a shaker (still in the box). I'm hopeful that the hole will relieve some of the underhood pressure. Though, even now, I don't have the hood shake problems that some others do.
You want to see it dance? Go 120+ Adjust all you want it will still do it.
I got it over 120 yesterday for the first time then took my foot off the pedal when I thought the waves I was seeing in the hood were a hallucination. THEN I remembered hearing about the hood flex and realized it wasn't just adrenaline making me trip out. LMAO.
I just picked up a shaker (still in the box). I'm hopeful that the hole will relieve some of the underhood pressure. Though, even now, I don't have the hood shake problems that some others do.
Hey, let us know how that goes. I am trying to sell my 02 GT vert, and if I do I'm either going to buy a Mach One or an 05 which I might just convert to a shaker. I think these new cars were meant for the shaker hood - that retro styling just sets it off.
The pressure build up will bleed off slowly around that shaker - its inevitable. All that constant flexing up and down can't be good for that aluminum alloy. Anyone else remember the case of the Hawaiian airliner that lost a big chunk of its roof from metal fatigue?
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tripleblack
"You can never be free until you let yourself go."
Hey, let us know how that goes. I am trying to sell my 02 GT vert, and if I do I'm either going to buy a Mach One or an 05 which I might just convert to a shaker. I think these new cars were meant for the shaker hood - that retro styling just sets it off.
The pressure build up will bleed off slowly around that shaker - its inevitable. All that constant flexing up and down can't be good for that aluminum alloy. Anyone else remember the case of the Hawaiian airliner that lost a big chunk of its roof from metal fatigue?
We'll see how it goes and I'll let you know... I'm waiting for some warmer days. Till then it remains in the box!
hhaha you guys think your hood bounch with my hood scoop forcing that much more air into my engine bay you can hear the hood bounce up in down at 110+ it was awsome on the strip but i got a set of hood pins just need to install them though..
Before you go to the dealer, or cut holes in the hood, try adjusting the front stops. Walk to the front of the car and pick up on the hood with it closed right in the front middle.
If it has any play up and down, open the hood and back out the front hood stops 1/2 turn evenly and gently close the hood. If there is still some play, do another 1/2 turn and so on gently closing the hood between tries.
The hood will end up in place as it should be, and will not shake at speed. Pretty low tech for sure, but in this case low tech is good
will a cowl hood help this condition even more? seems like it would be a lot more efficient at letting the heated air escape.
The idea behind a cowl induction hood was that it pulled air from a high pressure zone in front of the windshield (which worked fine with the relatively vertical body lines and windshields of the 70's) into the lower pressure area under the hood. This could be drawn into a properly designed cowl-mounted ram air intake, or simply used to cool the upper intake.
If the hood was a "functional" item (ie, open in the center next to the windshield), it would doubtless give the high pressure air from under the hood an alternative exit.
It would be doing the opposite of the original design concept - but it would probably do some good in terms of balancing the air pressure on both sides of the hood, and even might cool things off under there.
It would still benefit from hood pins, of course.
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tripleblack
"You can never be free until you let yourself go."
The simple (old-fashioned) way to reduce underhood pressures is to install some kind of front dam or spoiler that extends below the frame, preferably somewhere behind the station of the radiator.
An air dam only an inch tall will usually create enought of a "wind break" under the car for the underhood air to escape more easily. Because it helps to move the air out of the engine compartment, it also brings the engine & compartment temps down. It can be something as simple as a 1" tall section of hard rubber that is only as wide as the front crossmember...
You are essentially creating a negative pressure area under the car that gets filled by air trying to escape the engine compartment. It works well on older cars, so I can't see why it wouldn't work on our cars.
I too am a member of the Dancing Hood Club- and there is no amount of adjusting that I have done that has made a damn bit of difference- it's a piss poor design.
Absolutely true. WIth designs that echo the retro styles, its inevitable that the same problems will (still) be remedied by the same science.
Redirect that air away from under the front bumper and force it to go OVER the hood (or, to a lesser extent, around either side of the car), and downforce is created - the undesireable excessive high pressure under the hood is addressed - and the car looks cool to boot.
Shelby must have known what he was doing back when after all.
(The same principal works on ALL the mustangs, by the way, regardless of vintage).
Good point.
Quote:
Originally Posted by helicfii
The simple (old-fashioned) way to reduce underhood pressures is to install some kind of front dam or spoiler that extends below the frame, preferably somewhere behind the station of the radiator.
An air dam only an inch tall will usually create enought of a "wind break" under the car for the underhood air to escape more easily. Because it helps to move the air out of the engine compartment, it also brings the engine & compartment temps down. It can be something as simple as a 1" tall section of hard rubber that is only as wide as the front crossmember...
You are essentially creating a negative pressure area under the car that gets filled by air trying to escape the engine compartment. It works well on older cars, so I can't see why it wouldn't work on our cars.
I too am a member of the Dancing Hood Club- and there is no amount of adjusting that I have done that has made a damn bit of difference- it's a piss poor design.
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tripleblack
"You can never be free until you let yourself go."
Hood of my 2007 Mustang starts to shake up and down at 80mph? 
Hood wants to come off 
Adjust all you want it will still do it.
