Using EVO Application

[tomauto]

<img src=http://www.channel4.com/4car/media/M/mitsubishi/evo/03-large/04-400-r-detail.jpg>

"Those little nubby bits on the roof where it meets the rear screen are an aerodynamic device intended to reduce the drag created by the air as it rushes over the car."


A few magazines covered this. Who knows if it really works...if it does, why aren't more automakers using it

[Compaq888]

because maybe it only works at high speeds??
these cars are not made for fuel economy, they are made for performance.

Some aero stuff doesn't work for us because we don't attain high speeds.

[tomauto]

Mitsubishi says that it would help to reduce drag. Just an idea, just because it is for performance doesn't mean we can't use it. (not the wing, the things on the roof ~ I dont know what to call them)

[krousdb]

They are called vortex generators

[tomauto]

Here is a little explaination from the Phil Knox from the Toyota Tundra discussion.

Phil Knox:
Your hatchback has a station wagon type wake of turbulent air, however, it is free of attached vortices.The sedans wake actually begins at the end of the roof as flow which cannot follow the steep backlight angle separates. Also, while this flow may reattach at the end of the trunklid where the main wake begins, the radical pressure gradients and violent mixing zones caused by velocity discrepancies between dide flow and rooftop flow can cause attached vortices which can trail the car by hundreds of feet,robbing horsepower from the engine.

[SVOboy]

These have been discussed before, I think the general consensus was not for that much money, :p

They're mean looking though.

[rh77]

We discussed this exact thing here: http://www.gassavers.org/forum_topic/tool_for_visualizing_aero_vs_rolling_resistance.ht ml?from=30&comments_per_page=30

and found out that the generators reduce drag by .006 and downforce onto the spoiler similarly.

The full report: http://www.mitsubishi-motors.com/corporate/about_us/technology/review/e/pdf/2004/16E_03.pdf

Thanks for referencing the EVO though (it still holds a place in my heart) 8)

RH77

[SVOboy]

I followed an EVO just yesterday. It was quite the ugly car.

[tomauto]

It might not be the nicest looking car around, but it has supercar-like speed on a tight racetrack.

[molecule]

and blows trannies like buttered toast for breakfast
sti wrx > evo

lol

[tomauto]

Maybe that is why they put the rev limiter on the models, because people were revving it to the redline, and then dropping the clutch! Both cars are insanely fast, the WRX will treat you to a better ride, but if you want to feel 100% connected, get the EVO...

[Compaq888]

you want to put bolt ons then get the WRX sti. If you are going for pure power then get EVO.

STI's had problems with trannies too, I think the 04 models got it fixed.

I wouldn't get neither of those cars, STi is more reliable but I don't need a car that looks ugly like that.

I love the 3rd gen rx7. They have engine problems but if you swap in a LS1 then the problems go away.

[DaX]

They are called vortex generators

Vortexes are the ****! One of my tattoos is a nerdy fluid mechanics vortex thing. :p

[rh77]

The EVO is meant to be an agressive-looking vehicle and smokes just about anything out there.

Check out my Avatar -- does it look ugly there?

I agree -- I had tons of tranny probs, even with proper break-in (bad run of transmissions). When it ran, it works well for both race and 4-doorness.

But yes, the STI (big I this year) reigns supreme. I should've gotten one of those instead -- I might still have had it today (bad for mileage tho :P and speeding is just way too easy }:)

Honestly drive either of these cars and you'll be impressed.

RH77

[Compaq888]

Maximas with 3.5 swap now run 13 flat and soon mid 12's.

Basically a 95-99maxima with the 3.0 taken out and 3.5 put in. It will get about 20mpg around city and 30mpg on the freeway if you drive it right. Now that will smoke an evo.

rh77 have you seen the famous video of a civic hatch smoking a yellow EVO??? This just proves you don't have to buy a 30k car in order to go fast.

[DaX]

rh77 have you seen the famous video of a civic hatch smoking a yellow EVO??? This just proves you don't have to buy a 30k car in order to go fast.

For roughly $10,000 I was smoking the **** out of Mustang GT's and nearly all 4 cylinders with my Civic.

If you're willing to do the work yourself, you don't have to spend that much to blow away the competition.

[SVOboy]

Basically a 95-99maxima with the 3.0 taken out and 3.5 put in. It will get about 20mpg around city and 30mpg on the freeway if you drive it right. Now that will smoke an evo.

The funny thing about this is that there is a guy a few minutes from my house that took a 2.2 prelude engine and is making 793whp...

[Compaq888]

Basically a 95-99maxima with the 3.0 taken out and 3.5 put in. It will get about 20mpg around city and 30mpg on the freeway if you drive it right. Now that will smoke an evo.

The funny thing about this is that there is a guy a few minutes from my house that took a 2.2 prelude engine and is making 793whp...

Good lord. But If he used a 2.4 liter he would be boosting 650whp and be about the 1/4 mile time. Having a bigger engine will have a bigger torque curve most of the time. That's why NA maximas with 3.5 engine can beat supercharged 3.0 maximas

[mtbiker278]

I'm still waiting to see someone try to shoe-horn a small block v8 into a civic or something. Kinda like when they put big blocks in a Datsun way back when.

[Compaq888]

it has been done before. Try looking on streetfire.net
There is a video of a CRX with a big block V8

[SVOboy]

I don't see why the 3.4 would make 150 less whp than the 2.2, I am also not seeing a properly boosted 3.0 lose to a 3.5, but then again, nissans _____.

[The Toecutter]

I've seen images of a Honda Insight fitted with a blown 350...

[Matt Timion]

I'm still waiting to see someone try to shoe-horn a small block v8 into a civic or something. Kinda like when they put big blocks in a Datsun way back when.

V8 1st gen CRX (http://www.dilysimotorsports.com/V8CRX.htm)

Another one:

http://img.photobucket.com/albums/v612/ihearasian/crx.jpg

Some videos of this car in action.

http://videos.streetfire.net/video/D3895DB7-382C-46CC-9C7A-C69BEA2A5D90.htm

http://videos.streetfire.net/video/6616642A-FC75-4800-810E-19D7ECA25150.htm

[mtbiker278]

do you have a picutre of a propetual motion machine?

[Compaq888]

I'm still waiting to see someone try to shoe-horn a small block v8 into a civic or something. Kinda like when they put big blocks in a Datsun way back when.

V8 1st gen CRX (http://www.dilysimotorsports.com/V8CRX.htm)

Another one:

http://img.photobucket.com/albums/v612/ihearasian/crx.jpg

Some videos of this car in action.

http://videos.streetfire.net/video/D3895DB7-382C-46CC-9C7A-C69BEA2A5D90.htm

http://videos.streetfire.net/video/6616642A-FC75-4800-810E-19D7ECA25150.htm



yep, that's the car.

[rh77]

rh77 have you seen the famous video of a civic hatch smoking a yellow EVO??? This just proves you don't have to buy a 30k car in order to go fast.

For roughly $10,000 I was smoking the **** out of Mustang GT's and nearly all 4 cylinders with my Civic.

If you're willing to do the work yourself, you don't have to spend that much to blow away the competition.


My aim wasn't to go out street racing, and I'm not a mechanic. I wanted a one-off Rally car that I could have some fun with, and the EVO was the first one to fit the bill in the 'States. I had been watching them on the WRC for a few years at that point, and really wanted one. The EVO-8 isn't designed just for straight-line stuff -- if you dragged it too often, the clutch would be fried in no-time. I had a '99 Civic Si (B16A2) with no major mods that I could've easily modded to go fast in a straight line, but to have an AWD car with a warranty, recaro seats with 5-point harness points, four doors, a usable trunk, A/C, and a hand-made carbon-fiber spoiler seemed like perfect fun. Especially by putting Winter tires on in the colder months. I couldn't wait for the snow and ice. SUVs were sliding all over the place and here I was having a blast, in control. The pull from the turbo in 2nd and especially 3rd gears was truly memorable -- in any weather condition. The rear LSD locked-in when slip was detected and off you went. The steering was super-quick and handling was almost too good to keep up with. I could go on, but I won't bore you with the how much fun this car was (and I got to drive it to work every day) :-) It's out of my system now, and I'm driving a de-tuned Integra at 15 MPH under the highway speed limit. Who would've figured :?

-RH77

[Murat]

<img src=http://www.channel4.com/4car/media/M/mitsubishi/evo/03-large/04-400-r-detail.jpg>

"Those little nubby bits on the roof where it meets the rear screen are an aerodynamic device intended to reduce the drag created by the air as it rushes over the car."


A few magazines covered this. Who knows if it really works...if it does, why aren't more automakers using it

They sell those thingies as packs of 6 for approx $20.00 around here. Cheepskate plastic though. You need to treat, prep and paint em before you can mount em...

Extremely ugly... I would prefer a DTM style spoiler with vortex generating winglets facing upwards and splitters at the rear bumper (valance style) so the air flow will be headed and guided...

[n0rt0npr0]

Extremely ugly... I would prefer a DTM style spoiler with vortex generating winglets facing upwards and splitters at the rear bumper (valance style) so the air flow will be headed and guided...

I can't imagine this setup, would you be able to sketch it and share your sketch with me?

[Murat]

I will send the desings I drew with Macromedia(R) Freehand(C)(R) but I caould not manage adding them into the message. Could you please tell me how to ? The image tag does not let me throw the pic in from my diskdrive...

[SVOboy]

www.theimagehosting.com

You need to upload the image and it will creat a link for you with the image tags included. Good luck, I wanna see this design!

[Murat]

www.theimagehosting.com

You need to upload the image and it will creat a link for you with the image tags included. Good luck, I wanna see this design!


Let' s see now...

http://www.electronicfiles.net/files/293/Aerodesign1.jpg


Forgot to write the triangular shape' s name. It is a splitter; you need 4 of them to mount BEFORE the wheels...

[n0rt0npr0]

hehe, neat design! Thanks :)

[Murat]

Very kind of you. Actually these are sloppy computer sketches. I will make a detailed design and submit it asap. I will also give you folks the dynamics calculations when I am done with them...

[Murat]

Wanna turn my babe into this :

(All parts made of lightweight polyester)

Whaddya say ??

Please see the air dam and rear wheel spoiler and rear roof spoiler in detail. The wortex generators' angles etc. are calculated already. I of course will not be able to build this myself but will prepare the master from styrofoam...


http://www.electronicfiles.net/files/293/DSCN1665.jpg

[tomauto]

Will you have the car slammed like that? I like the cannards at the rear wheels. Do you have a undertray design also?

Everything is good, except you need to have the mudflaps taken off if possible.

[Murat]

Will you have the car slammed like that? I like the cannards at the rear wheels. Do you have a undertray design also?

Everything is good, except you need to have the mudflaps taken off if possible.


You bet I will... :D

Well the undertray will have a discharge duct / chanellising system + vortex generators at strategic locations to discharge the flow to the backend and sides wherever needed.
(I work at an airline co. and I have an abundance of aerodynamics and aeronautical engineers around me who are craving to tell about their knowledge...)

I will of course strip all the mudflaps.

[Murat]

Will you have the car slammed like that? I like the cannards at the rear wheels. Do you have a undertray design also?

Everything is good, except you need to have the mudflaps taken off if possible.


FURTHER :

This is the bellypan I have imagined so far. The channels you see are 3 to 5 cm' s high. (about 1,5 - 2 inches) This belly pan will be made of very thick polycarbonate and the channels will be cemented onto the pan. The black holes you see are access ports to the sump drain and the cold air filter intakes. I still have doubts about WAI) I plan to heat the fuel line and cool the air. (Hot volatile liquid entering cold air will vaporise much faster.)


http://www.electronicfiles.net/files/293/bellypan.JPG

[thisisntjared]

having the channels may help with downforce, hoever they wont be too beneficial for fuel economy.

also the angles you have on the front of the car infront of the wheels are of no value, it would be best to have the bumper get as close to the ground as it can in front of the wheels.

[tomauto]

One more step towards a racecar. All you need now is a venturi!

Smoother the better for an aeropackage however. It does look good though. Having all those engineers salivate over your car must be a good feeling. Where is this company? I would take a trip out here for a few aero tips!

[Murat]

One more step towards a racecar. All you need now is a venturi!

Smoother the better for an aeropackage however. It does look good though. Having all those engineers salivate over your car must be a good feeling. Where is this company? I would take a trip out here for a few aero tips!


:D

I am the contracts manager for Turkish Airlines in Istanbul... You are always welcome... However, I can send you an abundance of info once I sort it all out... These guys give you a hu-uge bunch of figures and numbers which you cannot understand unless you are well into it...

BTW, tell me / show me with a sketch what a venturi on a car will look like and you got it comin ' :D

[Murat]

I talked to one of my buddies on the phone after reading your post. He told me that I may as well design a super flat and smooth bellypan with a "raked" design (Duh !) :confused:

He told me that the bellypan should go straight but have a 5 degrees or a little more slope upwards (max 8 degrees and thereafter you have a violent turbulence) so the air passing with high speed and low pressure will discharge upright and smoothen out the turbulence behind the hatchback... He also said that a couple of deflectors here and there would help too...

I don't know; I guess I will be using corrugated plastic or polycarbonate sheeting... I believe I will design a diffuser at the end of the bellypan so I get rid of the turbulence which "grips" the car' s tail...

Lemme see what we can do... :D

I am aiming to design such a combination that it will be :

1- Stylish
2- Sporty
3- Fast
4- Economic

I acctually would have loved to go buy a second hand to experiment on it but I do not think I can afford it right now... I have an average of 35 to 40 mpg but when I give it a push, I easily exceed 25-20 mpg. I never imagined a 1.4 could burn so much !

I plan to name this black beauty' s name as "Dark Magic" or a corny name alike :p

Laters ! :)

[tomauto]

http://www.nas.nasa.gov/About/Education/Racecar/physics_groundeffect.html

if you are still interested, this website is just about amazing.:)