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Car Forum / Ford / Ford Mustang / July 200469 coupe spoiler advice
I would like to reduce the lift on my 69 coupe (at high speed) and also for looks. But im old school when it comes to form and function, if something is designed for a purpose but slapped on an application where it doesnt work and is for looks only, im against it. I think we all know what im talking about. Specifically, will a repro mach 1 spoiler actually mount properly and achieve desired effect on a coupe? I assume that a front spoiler will help but not sure about the rear. also, if anyone has had bad experiences with the aftermarket spoilers available from the paddockparts for example, ABS plastic OK or is fiberglass a better option? What were the stock ones made of?? Thanks, PS thanks for the pics in response to previous post. The rear spoiler will push the rear down thus pushing the front up. A properly adjusted rear spoilers will work at about 100 mph. (Ask me how I know!) The front spoiler is the one that keeps the the front down by spoiling the airflow under the car that causes the entire car to act like a wing. A stock mach 1 front spoiler will make a difference on your car. StuK > I would like to reduce the lift on my 69 coupe (at high speed) and > also for looks. But im old school when it comes to form and function, [quoted text clipped - 11 lines] > > PS thanks for the pics in response to previous post. A wing causes the air to move faster over one side of it than the other, like a car body. The air moving faster over the top of the wing, or car body, lowers the pressure above it creating lift beacuse the presssure below the wing does not change. It's the normal pressure below the wing, or car body, that allows it to be lifted by the lower pressure created above it. A rear spoiler is there to 'spoil' the lift, or low pressure area created by the airflow over the body, it does not create down force. The splitter on the front lowers the amount of air going under the front of the car which lowers the pressure under the car. Less pressure under the car means less lift when the pressure is lowered above the car.  SignatureMike Silver 10th Anniversary Cobra Coupe --- > The rear spoiler will push the rear down thus pushing the front up. A > properly adjusted rear spoilers will work at about 100 mph. (Ask me [quoted text clipped - 19 lines] >> >> PS thanks for the pics in response to previous post. > rear spoiler is there to 'spoil' the lift, or low pressure area created by > the airflow over the body, it does not create down force. You better tell all the top fuel guys and the vintage SR-2 racers then. Depending on the angle of the rear spoiler (extreme in most instances), downforce might or might not be created. SignatureScott W. '66 Mustang HCS 289 '68 Ranchero 500 302 '69 Mustang Sportsroof 351W '97 Cougar 30th Anniv SE 4.6L ThunderSnake #57 Then you are using the term "spoiler" incorrectly. A "spoiler" spoils lift, it does not create down force. If the apparatus on the rear of the body creates down force, like an upside down wing, then it is called a "wing". SignatureMike Silver 10th Anniversary Cobra Coupe --- >> rear spoiler is there to 'spoil' the lift, or low pressure area >> created by the airflow over the body, it does not create down force. > > You better tell all the top fuel guys and the vintage SR-2 racers > then. Depending on the angle of the rear spoiler (extreme in most > instances), downforce might or might not be created. Mike, Cool, so how did you come to know so much about aerodynamics? SignatureJohn ThunderSnake #59 If you Reply, be sure and remove the " (DELETE_THIS) " from the email address. > Then you are using the term "spoiler" incorrectly. A "spoiler" spoils lift, > it does not create down force. If the apparatus on the rear of the body [quoted text clipped - 5 lines] > > then. Depending on the angle of the rear spoiler (extreme in most > > instances), downforce might or might not be created. My Father was a licensed pilot and had a Cessna Skyhawk when I was in my teens. I also spent 10 years in the USAF, should have gotten my private pilot license but found other uses for the $$. I've read things here and there on the subject of aerodynamics and know the basics of how things work, but I don't have an in depth knowlede on the subject. SignatureMike Silver 10th Anniversary Cobra Coupe --- > Mike, > [quoted text clipped - 15 lines] >>> then. Depending on the angle of the rear spoiler (extreme in most >>> instances), downforce might or might not be created. Coulda fooled me. Excellent post. SignatureJohn ThunderSnake #59 If you Reply, be sure and remove the " (DELETE_THIS) " from the email address. > My Father was a licensed pilot and had a Cessna Skyhawk when I was in my > teens. I also spent 10 years in the USAF, should have gotten my private [quoted text clipped - 20 lines] > >>> then. Depending on the angle of the rear spoiler (extreme in most > >>> instances), downforce might or might not be created. So, sounds like having both front and rear "spoilers" would help. Except for the guy that said a stock mach 1 spoiler would not work on a coupe. Thanks, > Coulda fooled me. Excellent post. > [quoted text clipped - 23 lines] > > >>> then. Depending on the angle of the rear spoiler (extreme in most > > >>> instances), downforce might or might not be created. > Except for the guy that said a stock mach 1 spoiler would not work on > a coupe. Why wouldn't it? You just make a few small holes in the decklid and bolt it on. You just have to be REALLY careful. http://tinyurl.com/6lrtd Here's a pic from Mustang and Fords showing what le mans stripes and a front spoiler look like on a '69 coupe. SignatureScott W. '66 Mustang HCS 289 '68 Ranchero 500 302 '69 Mustang Sportsroof 351W '97 Cougar 30th Anniv SE 4.6L ThunderSnake #57 When you say spoiler are you talking about the FRONT or the back (wing)? The wing will work at about 100 mph. Again, the front spoiler will stop the lift you get on the old Mustangs at around 80/90. My '71 Cyclone Spoiler use to hunker down closer to the road at speed. At 115 mph I actually started scraping my mufflers on the road. StuK > So, sounds like having both front and rear "spoilers" would help. > Except for the guy that said a stock mach 1 spoiler would not work on [quoted text clipped - 29 lines] > > > >>> then. Depending on the angle of the rear spoiler (extreme in most > > > >>> instances), downforce might or might not be created. with the decklid spoiler i was worried about getting stuck with one that doesnt let you adjust the angle. do the repros adjust? also with the front spoiler ive seen them listed as, "the bolt on type" what other types are there? whats the best to get and do they require modifications to the body or valance to install?? > When you say spoiler are you talking about the FRONT or the back (wing)? The wing will > Mustangs at around 80/90. > My '71 Cyclone Spoiler use to hunker down closer to the road at speed. At 115 mph I [quoted text clipped - 35 lines] > > > > >>> then. Depending on the angle of the rear spoiler (extreme in most > > > > >>> instances), downforce might or might not be created. > also with the front spoiler ive seen them listed as, "the bolt on > type" what other types are there? I was thinking the same thing. Do they have Velcro?? I can see the Ricer's pulling off their spoilers to stash them in the trunk when they go into the mall. Velcro! LMAO!!! SignatureScott W. '66 Mustang HCS 289 '68 Ranchero 500 302 '69 Mustang Sportsroof 351W '97 Cougar 30th Anniv SE 4.6L ThunderSnake #57 The proper decklid spoilers used on '69/'70 Mustangs are adjustable. The '69 BOSS's had plastic ones and they tended to droop in the middle on hot days so Ford made the '70's out of fibreglass. They were actually quite heavy and required a small prop rod to stop the trunk from closing. The same one was used on the '70/'71 Cyclone Spoilers and the Cougar Eliminators. ( Mercury painted them body colour) The '71 to '73 Mustangs used the same wing part but had shorter legs to account for the larger ( higher) fastback. As for the stock front spoilers they screw or bolt on to the valance and are molded to the shape of the valance. I added some small metal brackets near the middle on my '70 mach 1 as I have seen them fold under at high speed ( they are ABS plastic) HTH StuK > with the decklid spoiler i was worried about getting stuck with one > that doesnt let you adjust the angle. do the repros adjust? [quoted text clipped - 43 lines] > > > > > >>> then. Depending on the angle of the rear spoiler (extreme in most > > > > > >>> instances), downforce might or might not be created. for example, the ones sold by www.paddockparts.com are ABS plastic, the rear has a steel rod through it to keep it straight and they sell all the mounting hardware. the front one is bolt on type and dont know if they have mounting hardware and it plastic. they also carry all the shelby scoops. and a mach 1 hood scoop which im also thinking about. i think im gonna go for it with the side scoops, i plan on keeping this car quite a long time and why not go all the way and do something special with it. > The proper decklid spoilers used on '69/'70 Mustangs are adjustable. > The '69 BOSS's had plastic ones and they tended to droop in the middle on hot days so Ford [quoted text clipped - 56 lines] > > > > > > >>> then. Depending on the angle of the rear spoiler (extreme in most > > > > > > >>> instances), downforce might or might not be created. |
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