Picture of Evo X's underside [ Archive] - GasSavers.org - Helping You Save at the Pump
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s12Dave
12-13-2007, 11:20 AM
This is a scan of a Japanese brochure for the Evo X. It shows some of the aerodynamic highlights of the Evo X's underside.
http://img216.imageshack.us/img216/8965/rocketpunchautoblogevo3id2.png (http://imageshack.us)
Interesting in how it looks like they are trying to force the air out in the middle of the car. Develop a low pressure zone?
lunarhighway
12-13-2007, 01:55 PM
might this be something similar as old saab 900 have? some have something the size of a mudflap somewhere half between the front and aft wheels... i think it could angle outward slightly too.... i have yet to find out what it's for, and haven't seen it on any other car thusfar...
the strips on the evo seem easy enough to replicate but i doubt they're usefull for FE... can't remember the last time i felt short of downforce...
to me the car does not look like a good source of inspiration for FE related mods... the front looks like a whole body pannel fell off.... than again it looks agressive and fast etc... and that's what that car is probably about.... just not what i get exited about these days.
DarbyWalters
12-13-2007, 02:28 PM
Looks like it all directed toward downforce...which makes sense for that type of vehicle.
I doubt it is for downforce. The initial angle of attack for the front of them suggests they are intended as spoilers, not airfoils. My bet is on high speed stability enhancement.
lunarhighway
12-14-2007, 01:48 AM
there's some readable text below the pictures of these things stating +1 and 2 kg extra downforce front and rear at 100 km/h
and +3 and +6 kg at 180km/h
i think i was a test somewhere, might have been autospeed but i'm not sure, where they where testing the shape and size of wheel fairings (these inverse mudflap thingies), to redure drag. when they where placed to far ahead of the wheel drag increased, but so did downforce....
than again it might help stability at well
kamesama980
12-14-2007, 02:47 AM
evos ARE fastt and powerfull. the wide opening is for the cooling system of the car because it's been designed to be able to be run at more than 5% throttle where most of the people here top out at. I'd like to see some of the grill-blocked cars here run 50% throttle for any amount of time with load.
DarbyWalters
12-14-2007, 03:26 AM
I doubt it is for downforce. The initial angle of attack for the front of them suggests they are intended as spoilers, not airfoils. My bet is on high speed stability enhancement.
Hence Downforce...taking air out from underneath a vehicle creates more downforce.
If it's moving air from underneath the car, it could aid in dropping the overall height of the car in motion. A reduction in overall height could increase mileage?
I don't necessarily think that would be Mitsu's intent, but it might be an additional benefit.
evos ARE fastt and powerfull. the wide opening is for the cooling system of the car because it's been designed to be able to be run at more than 5% throttle where most of the people here top out at. I'd like to see some of the grill-blocked cars here run 50% throttle for any amount of time with load.
Somebody missed my holiday tree transportation posting.
100% throttle for many miles with the grille blocked!
I doubt the tree provided any downforce. ;)
BluEyes
12-16-2007, 10:11 PM
I'd like to see some of the grill-blocked cars here run 50% throttle for any amount of time with load.
My Chrysler has the main grille blocked and has no trouble going up a 7-8% grade for 8 miles at 70mph (that's a 2000ft climb, BTW). Also will cruise all day long on the interstate at 85mph.
If it's moving air from underneath the car, it could aid in dropping the overall height of the car in motion. A reduction in overall height could increase mileage?
I don't necessarily think that would be Mitsu's intent, but it might be an additional benefit.
I wouldn't think any of the EVO's aero aids would benefit the hypermiler as it would all be directed towads cooling stabilty and downforce.
On the the Evo 7,8, and 9, the front underpanel was created to help guide air to cool the brakes. This design looks a bit similar, with a little more emphasis on cooling.
I believe that the middle diffusers would have more to do with lateral stability during a turn or cornering. As you turn, a car naturally rolls its weight to the outer wheels. Having these diffusers, you'd probably be able to create some downforce on the inside cornering wheels to help distribute weight to the inner wheels. It would seem that Mistubishi was trying to kill 2 birds with 1 stone by creating cornering stability and redirecting the air away from the rear wheels.
My Chrysler has the main grille blocked and has no trouble going up a 7-8% grade for 8 miles at 70mph (that's a 2000ft climb, BTW). Also will cruise all day long on the interstate at 85mph.
You guys also have to remember that this car also has a turbocharged engine which runs at a near constant 15-16 times atmospheric pressures. The engine bay with any turbo car can reach temeratures nearly 200X greater than that of a naturally aspirated car. You would have to sacrifice aero for cooling at that point.
he engine bay with any turbo car can reach temeratures nearly 200X greater than that of a naturally aspirated car. You would have to sacrifice aero for cooling at that point.
I think you might want to rethink that number.
I have a turbo bus with a very confined space that is operated under a good load of its heavy body and then a trailer. I think at 200X the frame would melt.
I think you might want to rethink that number.
I have a turbo bus with a very confined space that is operated under a good load of its heavy body and then a trailer. I think at 200X the frame would melt.
It may be a bit exaggerated, but it will get hot enough to melt wires and such. Your turbo bus does not run 16psi constantly and the engine is not running at the efficiency as the EVO's engine. Efficiency as in producing that much horsepower from a little engine. That is quite the load on the engine components itself. Sure it has good towing compacity, if you put this engine on your frame it would do that and more.
kamesama980
12-18-2007, 10:49 AM
I'd hate to be driving when the engine hits 30,000 degrees! (150f for mild NA car x200)
Even big diesels only hit 4x atmo on the boost gauge without MAJOR mods. stock turbo cars usually stay under 20 PSI which is not even 1.5x atmo
Diesels run at 40% efficiency while gassers are at about 33% too.