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Reaper's Mustang Project (abridged version)

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Old Sep 7, 2009 | 01:56 PM
  #651  
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ya if your only going to use one window vent i would just put it on the drivers side for 2 reasons... less blind spots and also any passenger in the rear wont have to fight the duct work.LOL
 
Old Sep 7, 2009 | 02:03 PM
  #652  
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Drag? You mean me mentioning the NACA duct is a low-drag design? Not really; I doubt it would affect the cD at all. As far all the other aero mods, I think you may be confusing drag and downforce. I'm not as worried about drag as I am downforce (though reducing drag would be a plus). Drag would affect the fuel economy at highway speeds (don't believe me? Imagine a school bus and a mclaren f1 weigh exactly the same, same engine/trans/tire size. Which one gets better fuel economy at 65mpg?). As far as reducing drag, the car being aggressively lowered is the only thing that will really reduce drag. The front splitter and rear diffuser reduce lift (AKA create downforce), the belly pan is in place to keep the air flow laminar as it makes its way from the splitter to the diffuser, and the spoiler obviously creates downforce.

Now, will this make a difference for daily driving? Abso-f*cking-lutely. The misconception seems to be that you have to be going at ridiculous speeds (120mph seems to be the common number) for aero to have an effect, when in fact, aerodynamics starts coming into play at fairly low speeds (I've heard 30mph. Granted, the effect would be fairly negligible at 30mph), so at highway speeds (65-70mph. And yes, there are 70mph speed limits on the interstates here) they would definitely have a noticeable effect.


*edit: lololololololololololololololololol passengers in the rear. The rear seat is being pulled out, the cage and harnesses are going to be majorly intruding into the rear of the cabin, and when the exhaust is done, part of it will come up where the rear seat used to be and go into the trunk to pass over the rear differential (it will be in an insulated tunnel). The car will be a two-seater with no usable trunk (fuel cells, exhausts, trunk-mounted batteries, and partially caged trunks do that); that's why it's not going to be DD-ed.

As for the blind spot, like I said, I'm going to start paying attention to see which quarter window I look through more. The one I use least will be the one that gets replaced with the NACA duct. That is, of course, assuming I decide to go with only one NACA duct.
 

Last edited by reaper2022; Sep 7, 2009 at 02:07 PM.
Old Sep 7, 2009 | 02:09 PM
  #653  
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dang you really gonna be cuttin the b**** up.LOL
 
Old Sep 7, 2009 | 02:14 PM
  #654  
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lol yeah, pretty much. Everything's going to be reinforced and done right, though. That's why I plan on getting a DD next year (when the heavy work starts. That's right, I don't consider replacing every suspension piece, replacing 90% of the removable body parts, and a flashy paint job heavy work lol). I see the car having a lot of down-time. Basically, half the rear seat pan is going to be cut out to route the exhaust, a tunnel will need to be fabricated, half the trunk is going to be cut up (exhaust routing and fuel cell mounting), and huge hunks of sheet metal will be cut up to duct the side scoops through. Not to mention the fact that the frame rails and pinch welds are going to be reinforced with dedicated jacking points (I'm going to set them up so they stick out just barely past the belly pan). Then, of course, there's going to be several months where the engine is out of the car being built, and there's the month or so I expect to spend having the turbo manifolds, downpipes, and wastegate dumps fabricated where the car won't be drivable.
 
Old Sep 7, 2009 | 04:00 PM
  #655  
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o hell then go big and get some automatic jacks on all 4 corners dont know if you know what im talking about or not ive only seen it pictured on one vehicle in a magazine. they had like large pins that came out from the bottom of the car to lift the cars wheels off the ground. pretty cool but im sure that was a pretty penny!
 
Old Sep 7, 2009 | 04:46 PM
  #656  
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sounds good then

P.S. our speed limit on the interstate is 70 too
 
Old Sep 7, 2009 | 04:46 PM
  #657  
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Stu - yeah, like I said, most people don't realize how much of a role aerodynamics plays at highway speeds. H*ll, I got 31mpg out of a modified car (and none of my mods do anything other than lower my fuel economy. More air into the engine means more fuel to compensate to make more power, numerically higher gear ratio means higher rpm's at a given speed, and the thing has an aggressively advanced timing curve) that's supposed to get 29 in stock form just by drafting my sister's jetta over the course of ~300 miles. At highway speeds, things like the splitter/belly pan/diffuser, spoiler, and ride height will have a drastic effect on the way the car acts. And I pointed out the speed limits because I'm sure there would be one douchebag to say that I shouldn't speed or whatever lol

Marcus - Yeah, I know what you're talking about. I believe F1 cars use them, among others. Believe me, I've thought about putting air jacks on the car, but I can't justify the cost or difficulty of doing it (actually, I can't justify the cost of everything I'm doing anyway).

But I think I'll be fine with a good ol' fashioned low-profile floor jack and some 2x10's (the 2x's would be to get the car on a lift).
 

Last edited by reaper2022; Sep 7, 2009 at 04:50 PM. Reason: Stu got a post in before I finished my reply lol
Old Sep 7, 2009 | 09:52 PM
  #658  
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My goodness reaper, beyond anything ive expected haha the things you've done to this pony on drugs amazing.

im digging it
 
Old Sep 10, 2009 | 08:44 AM
  #659  
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haha, thanks man. Actually, the heavy work hasn't even begun yet; I'm just trying to get it ready for the heavy work (building a 600whp engine and a transmission that can hold it). Right now I'm just trying to get the suspension where I want it, then next spring I'll be starting on the body work, and hopefully by next fall/winter I can have the car in the garage with the engine out ready to be built.

Anyway, slow day at work... some of the techs went out to clean up the junk pile behind the shop, and I scored some free parts I'm hoping I can find a use for. I have two upper intake manifolds from different cars complete with throttle bodies; I'm going to measure the TBs to see if either one is bigger than mine, and if one is, hopefully I can get it to play nice on the mustang. Also, I found a splash guard from (I'm guessing) something along the lines of a BMW or Audi with three molded NACA ducts in it. I'm going to cut the section with the ducts out and incorporate them into my splitter (when I get around to making it) to get some air flow to the radiator, since it'll have a giant FMIC sitting in front of it.

Also, I did some pricing on materials for the under-body aero work. Reinforcing the frame rails will be around $50-$100, the belly pan will be around $300-$400, and the splitter and rear diffuser (together) will be something like $300. Of course, for the frame rail reinforcement, I still need to look into the cost of renting a MIG welder, but I wouldn't think it would be too expensive to rent one for a few hours. I won't have to pay anything for labor, since it's me and my friend fabricating everything. Basically, it's going to be a lot cheaper than I initially thought.

Pics of the parts I scored will be up tonight. I'm posting from the shop (like I said, slow day) so obviously I don't have my camera on me.

*ninja edit: Also, I'll probably be ordering the camber/caster plates in the next week, so expect a mild drop (1.5"-2") in the next month sometime. I figure cut springs (again, the right way) will do for a few months until I get my suspension parts together.
 
Old Sep 10, 2009 | 02:27 PM
  #660  
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Bump because I'm a post *****

I'll definitely be ordering the C/C plates, most likely early next week (gotta wait for my paycheck to actually make it into my bank account). Hopefully they get here within a week or so (they should be, anyway. Stangmods is usually pretty good about getting parts out quick). The first weekend I get a chance, I'll pull the suspension apart and cut the springs (I'll probably go with a tiny bit of a raked stance), then align it at work sometime in the week after that.

Anyway, here's the splash guard I got today:
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As you can see, there's three NACA ducts molded into it. I'll be cutting them out and incorporating them into my splitter next summer when I make it.

And here's the two intake manifolds I got. Obviously, I'm going to have no use for the manifolds, but I'm hoping I can use one of the throttle bodies (assuming one of them is larger than my stock one is):
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*edit: okay, it'll be another week for the camber/caster plates. They messed up the payroll this week and I wasn't paid the correct amount, so they're going to add the difference in pay to my paycheck next week (so they don't screw up the taxes).


Also, sorry about the pictures being down. It would seem my monthly bandwidth was exceeded. Pics will be back up on the 23rd when my bandwidth is reset.
 

Last edited by reaper2022; Sep 11, 2009 at 04:17 PM. Reason: I didn't get paid what I was supposed to lol



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