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Blocking off grill - Less Drag, More MPG

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Old Jul 9, 2007 | 04:23 PM
  #41  
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Originally Posted by frogbox
Give me a break. The airflow under an xB's grill is no where near the efficiency of an F1 car's wind-tunnel-tested cooling ducts. Where is there anything aero behind the xB grill?

first, never said the xB was as effeciant as an Fomula 1, BUT the same priciple applies. designers of full out race cars, be it Nascar, formula 1, or top fuel, use ( actually by the law of physics), have to use the same laws.

Where do you think they got the ideas from?( look at the testing they did with the Dodge Daytona aka The Superbird) :D

And so, here is some interesting reading for some of you http://www.airtab.com/press.htm

and for captainlaziness here is another http://www.mitsubishi-motors.com/cor...004/16E_03.pdf
http://72.14.253.104/search?q=cache:...lnk&cd=1&gl=us

now go do your homework as I have been doing on decreasing drag and increasing mpg in terms of areodynamics.

and i refuse to have a battle of wits with unarmed people, not attacking anyone, just stating facts so you may learn something.
Yes I'm familiar with Airtabs and vortex generators. It seems to me, the jury is still out on that. (anecdotally maybe 1% F.E. improvment) Why, do you run them?

BTW nice bumper-sticker retort: "battle of wits with unarmed yada yada..."
...This guy must be smart
Old Jul 9, 2007 | 04:38 PM
  #42  
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Oh OK that makes good sense! I added small little 4 inch peep mirrors that are like no drag at all. I noticed a huge reduction in wind noise so I figured they were helping mpgs some.
Old Jul 9, 2007 | 05:08 PM
  #43  
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Originally Posted by typhoonorchid
Originally Posted by frogbox
Give me a break. The airflow under an xB's grill is no where near the efficiency of an F1 car's wind-tunnel-tested cooling ducts. Where is there anything aero behind the xB grill?

first, never said the xB was as effeciant as an Fomula 1, BUT the same priciple applies. designers of full out race cars, be it Nascar, formula 1, or top fuel, use ( actually by the law of physics), have to use the same laws.

Where do you think they got the ideas from?( look at the testing they did with the Dodge Daytona aka The Superbird) :D

And so, here is some interesting reading for some of you http://www.airtab.com/press.htm

and for captainlaziness here is another http://www.mitsubishi-motors.com/cor...004/16E_03.pdf
http://72.14.253.104/search?q=cache:...lnk&cd=1&gl=us

now go do your homework as I have been doing on decreasing drag and increasing mpg in terms of areodynamics.

and i refuse to have a battle of wits with unarmed people, not attacking anyone, just stating facts so you may learn something.
Yes I'm familiar with Airtabs and vortex generators. It seems to me, the jury is still out on that. (anecdotally maybe 1% F.E. improvment) Why, do you run them?

HMMMMMMM... more reading for you , NASA artical/study is good

http://www.thinkwrite.com.au/ourwork...-airtab-1.html
http://www.airtab.com/faq.htm
http://www.austranstech.com.au/airtab.html

BTW nice bumper-sticker retort: "battle of wits with unarmed yada yada..."
...This guy must be smart
Thanks for the compliment , and yes, I have been told I was smart and wise many times before also highly educated :D
Old Aug 23, 2007 | 10:51 PM
  #44  
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Originally Posted by captainlaziness
tC listed at .32 http://www.automobilemag.com/am/2007...fications.html

xB listed at .35
http://www.automobilemag.com/am/2006...fications.html

Even if the C/d number was lower I think the xB has a greater frontal surface area which is important to consider when figuring the aerodynamic efficiency. A lower C/d value doesn't necessarily equate to a "slipperier" vehicle when the total frontal area is larger.
Nice! I wonder what the xA is rated at, that web site does not detail the xA like it does the tC or xB
Old Sep 6, 2007 | 08:23 PM
  #45  
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ok, in all my posts, i have mentioned masonite twice not like i own stock in a lumber company or anything all kidding aside though, any time i hear about someone wanting to use "painters tape and styrofoam" on the outside of their car for any reason other then making a float for a parade i just have to think rice... lets be real.. while it was a decent idea, and i too would like to see numbers. if you are going to do something, do it mostly right, and make it look as factory as possible, thats just m.h.o. if you want to get better mpg on long trips, here is what you do if you don't want your car to look like you just got off the night shift at the walmart.. (no offence, but slap an APC sticker on that box and i'll be sending pics to laughatrice.com....) fold in mirrors, clean your air filter and MAF, remove passenger seat, remove back seat - upper and lower, remove storage trays and if you have AAA, remove spare tire.. watch your MPG jump on long trips, and watch the front of the vehicle still look stock and clean.
Alternitively, i would like to see more new ways to get air into the airbox / CAI / SR intake areas w/o removeing the foglight grills or adding a hole to the bumper.
Old Sep 6, 2007 | 08:33 PM
  #46  
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though, typhoonoprchid - understand i am not knocking your idea at all, i think it's dope that you actually are thinking along those lines, i am just knocking the astetics of your idea.. i think if mpg gains could be made that way, there is a cleaner more OEM way to make it look is all. if you ever get a change to do a test on your idea, we would all be rooting for you and would be glad to know the results!
Old Sep 7, 2007 | 09:49 PM
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Wow, not only resurrected from the semi-dead, but the guy also gets beat to hell just for suggesting something different and experimental! Hmmmm....

Anybody ever notice how "tough" people get on their computer???
Old Sep 8, 2007 | 03:14 AM
  #48  
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Originally Posted by BoxOffice
Wow, not only resurrected from the semi-dead, but the guy also gets beat to hell just for suggesting something different and experimental! Hmmmm....

Anybody ever notice how "tough" people get on their computer???
Yeah, it's kinda the same way people get "brave" when drinking. Sad really!
Old Sep 8, 2007 | 02:23 PM
  #49  
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I hope your idea comes up with some good numbers but this is another one of those TOYOTA designing and engineering team vs. Dude on a website with some foam blocks.

But hey, that's how Edelbrock made his millions I suppose.
Old Sep 8, 2007 | 03:04 PM
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edelbrock wasn't building a business on foam blocks and masonite tho
Old Sep 8, 2007 | 06:36 PM
  #51  
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Edelbrock..doesnt supply body parts either
Old Sep 8, 2007 | 08:51 PM
  #52  
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I was trying to say that just assuming that the engineering team of a particular automobile company has done everything correctly doesn't mean that you can't do it better yourself, whether it be body parts, engine parts, or the like.

I should know better than to utilize analogies on the internet...

Old Sep 8, 2007 | 09:02 PM
  #53  
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i get the feelin some peeps just like to shut others down as much as possible to justify there own existance
Old Sep 9, 2007 | 12:02 AM
  #54  
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Too bad we can't get ahold of any of Toyotas wind testing info. from the bB. Maybe see the different things they did to make the bB/xB as slippery as it is.
Old Sep 9, 2007 | 12:11 AM
  #55  
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Originally Posted by bB2NER
Too bad we can't get ahold of any of Toyotas wind testing info. from the bB. Maybe see the different things they did to make the bB/xB as slippery as it is.
I think this might be a kind of stealth bomber thing going on here. Smooth and round does not an aerodynamic vehicle make.

I am thinking that one of Toyota's main marketability tactics is fuel economy and, while coming into an American market, they trying to get the most amount of power out of their engine whilst applying that tactic. Why would they just push Aerodynamics to the side?

I imagine that Toyota did everything they could to keep that shape while making it as aerodynamic as possible. This same logic is reason why I always am a little leery when I see a intake thread. If Toyota is banking on us to be attracted to MPG, why would they make a intake that was restrictive and bad for MPG?

Of course this is all speculation...

edited for grammar
Old Sep 9, 2007 | 12:29 AM
  #56  
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Originally Posted by JusticeThrust
Of course this is all speculation...
But... It makes perfect sense!
Old Sep 9, 2007 | 04:49 PM
  #57  
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Originally Posted by frogbox
Originally Posted by bB2NER
frogbox, am I correct about the removal of my side mirrors decreasing overall drag? Also will this grill blocking off really help?
Yes, removal of the mirrors decreases the frontal area or face of your car, but if you put on some type of mirro some where else you need to add that back into the formula..
Think inside the box. Literally. Perhaps those mirrors could be replaced with a pair of small-lens, wide-angle cameras that have an aerodynamic profile not much worse than the xB's own side markers, feeding a small pair of mini-LCD monitors on the inside door panels?

Of course, it'd have to be winter-proof, but a wave begins with a ripple, sort to speak.
Old Sep 10, 2007 | 05:08 PM
  #58  
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Check out, tiny lcds picked up their card at Cedia.
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