Please provide some more indepth explanation to venting air out of the engine compartment via around the front tires. Are you suggesting cutting holes in the sides and fender well liners? I also don't understand what you are referring to about "cheap rubber side rocker flaps". Don't mean to hijack this thread but I'd love to get the air to exit from under the hood w/o switching to a heat extracting hood. I would love to keep the stock hood as it is my favorite. My other thought was to buy a 96-98 Cobra fiberglass hood and then customize a vent at the front of the hood behind the radiator. Not sure how it'd look and it'd be an expensive test project!
In search for more aero
- Thread starter racebronco2
- Start date
The vg's need to be in clean air stream. The underside of the car is too turbulant and they would not work in the rear.
I don't think he meant venting air out of the engine compartment via around the tires. He meant the air going around the tires via air dams in front of the tires. Here is what he said in an earlier post" This is actually a pretty good piece. On a race car I'd make those air dams in front of the tires longer to shroud the tires."
Look at the nascars, they have their rocker covers only inches above the ground .
The hood mod will only be expensive if you bought a good hood, the hood i have on my car cost 40.00 but was damages in several places.
There is a guy on the Evo forum whose car is setup for time attack/road racing. He's got a ton of engine mods as well as aero mods. Running the quarter mile, he said he gained at least 3 mph by taking off his rear wing and putting the stock front bumper back on. That's not even top speed.
I think the rear pan from the tank to the bumper is a good idea, even better if you can find a way to seal up the whole rear bumper, or maybe get some vents to put in the bumper to prevent the parachuting. Unless you are doing serious aero mods like 'racer', little things like this should really help.
I think the rear pan from the tank to the bumper is a good idea, even better if you can find a way to seal up the whole rear bumper, or maybe get some vents to put in the bumper to prevent the parachuting. Unless you are doing serious aero mods like 'racer', little things like this should really help.
^^^Along with anyone else....
I want a diffuser if you guys can come up with one. Heck i wouldnt mind using my car as a tester. I have the Cobra R front bumper and Wing (same car in avatar)Ashley im only about 10 minutes away so if you ever want to meet up let me know.
Reading more about diffusers it's gong to be really difficult to get one that actually works. The underside of the car needs to be really smooth to allow clean air to travel from the front of the car to the rear. The irs cars have more of a problem since our exhaust is so low in the rear. The diffuser needs to be lower then the exhaust for it to work. Now if you want one that kinda works but looks really cool that can be done.
Then why do Ford GT's, Ferrari f-430's and a bunch of race cars have elongated vg's on their rear diffuser?
Ever seen the bottom of those cars? They are completely flat, especially the F430. I've closely inspected the bottom of a Lotus Exige S and its a big flat piece of aluminum. It would be very hard to do this on our cars.
Yeah, I've been doing a lot of research as well. Unless we completely flat-bottom the car the air would not stay clean enough to work like a pure racing diffuser. I have an idea though. Most diffusers can aid the rear wings as it help to reintroduce the lower pressure air to the high pressure air coming off the wing. I think it would be worth while to make a basic diffuser that starts near the axle, extend it back at an angle of around 9 degrees, and extend it around 5-6 inches past the rear bumper. This not only will help close that gap in the bumper, aid any wings people may have, but since we have a little more area because we're past the car it should be slightly effective. This will only work on a lowered car, but I think if we can make the diffuser light enough, it could be worth it.
I read this on CC and think it speaks the truth. "If you want down force on a mustang, just get a big ass wing". I think a nice front splitter and wing are the best bet, but I think a diffuser can help the rear wing and it just looks cool
But arent the vg's on the diffuser there to help straigten out the turbulence?
I get the fact that w/o a smooth underside there is going to be turbulance. However the fact that a simple diffuser would keep the air from getting caught in the rear bumper cover at speed would be a plus.
Vg's and diffusers and two different aero terms. Vg's separate the air and diffusers direct the air with large fins.
Yes. I say since we're already developing a plate to block it off, we might as well put a little more effort into it and make a true diffuser and at least rake the minimal gains it provide.
I think you are over estimating the amount of drag being caused by the rear bumper.
Once again, fix the front end and put a big ass wing on the back and you'll be amazed at the difference.
Once again, fix the front end and put a big ass wing on the back and you'll be amazed at the difference.
I'm gonna say short of getting a true cobra R front bumper, a custom splitter from APR as well as their canards for the front would greatly increase your front end downforce and keep it planted at high speed. Just be sure to support the splitter on more than your plastic front lip because there is a ton of force on that thing at even normal speeds.
I think it's safe to say we know how bad the rear end on a Mustang is. I'm thinking it couldn't hurt to at least make a diffuser to get some of the benefits. If we're making a cover for the bumper, why not incorporate the diffuser, it could help the wing as well.
That looks pretty good, and is probably a good start for cleaning up the air in the rear as well as keeping some air from getting trapped under the bumper..
I picked up my "r" wing today and hope to get it painted (satin black for now)mounted today. I will finish fabbing up the side pans and hope to get these painted along with the rear pan.
I'm not sure, but I think Bruce (AKA AC427 Cobra) may have improved end plates available.
:beer:
Yeah, he does.
(secretly, I think they look hideous, but don't tell Bruce because form<function :burnout
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