I like it, looks sweet imo..

 

That's cool!

 

i gotta admit that it increases the ricey look.

 

I don't think the design is really all that bad, I think it's the way the center air duct just dips right in. There's no smooth transition, no curves, just a whole bunch of hard angles.

Maybe come up with several prototypes?

 

Function was the first consideration. Placement of vents was determined from the inside out. We also did not want a bunch of bumps sticking up from the hood line.

ROAD/RACE

 

beautifulll i love the look of Xs... i think everyone can agree that its a beautiful car regardless its little loss in speed

 

keep it like the stock hood... it needs all the same vents so the car's venting wont be screwed up.

 

You should read about 5-6 posts back.

ROAD/RACE

 

The reason for the 'bumps' on the OEM Evo hoods is to make sure that air actually flows through the vents. If you do some research on aerodynamics, you'll see that placing a ridge ahead of the stock vents creates a low pressure area above the vent, which helps in moving air through it. IMO your hood design does not look like it will improve cooling (other than maybe at a standstill) and will probably negatively impact the car's aerodynamics.

l8r)

 

to satisfy the critics of the cooling efficiency of this design vs. oem, might i suggest instrumented tests of the under-hood temperatures for the key areas affected by the vents?

 

^+2

 

I agree with you but I am pretty sure this works fine. F-1 cars use gills with no bumps to extract heat and similar ducts to inlet air. Those are the best aero boys in the business. Would they not use a practical method for extracton and infusion of air? Look at defending championship Ferrari f-1 car for reference.

ROAD/RACE

 

I don't think F-1 engineers put gills on their cars all ***** nilly. With the level of competition and stakes on the line ... I'm pretty sure they use things like Masters degrees in engineering (probably even a few PhDs) and all sorts of elaborate testing equipment (such as wind tunnels).

And one thing I don't understand about this thread is ... you asked for people's feedback ... which is an excellent thing in my opinion for a vendor/manufacturer to do. What I don't understand is this ... the overwhelming opinion seems to be negative with a majority of the people wanting an OEM looking CF hood instead.

Now that you've gotten this feedback ... instead of
1) going back to the drawing board to provide what the people (your hopefully future customers) want

or

2) proving to the people that your design is in fact better with real scientific evidence

instead you continue to defend your lackluster design with things like "I am pretty sure this works fine".

Oh well if companies don't make what the people want ... the people will take their money somewhere else for the products that they do want.

 

I am listneing but I can respond to certain comments that appear to be taken as the only arguement for design. There are other points to be made and we did not just make the hood without thought. We did not do anything ***** Nilly either although I do not claim to know what an f-1 engineer does. I simply responded to the arguement that bumps or ridges are the only approach to extraction and infusion of air. That is what was brought up as a comment. Again, engineers did look at this hood. THey never mentioned that even though I can agree with it. Everyone keeps skipping over that part of the thread. Oh well. Thanks

ROAD/RACE

 

I saw the comment about engineers, but unless they design aero parts for a living, I wouldn't take their word as gospel. If you look at examples of other OEM hood vents (current M3, older Subarus, etc.) you'll see that the ridge before the vent is a very common theme. Also, I don't think the F1 comparison holds up, since an F1 car doesn't have much of a hood and generally has vents towards the rear, around the engine. Again, the idea is that you want a low-pressure area above the vent. IMO, if you want extra cooling in the rear of the engine compartment, then an extra pair of NACA ducts vented to the side would probably work better. The middle duct on your hood, btw, looks good.

Personally, I'd put some streamers around the vents and then drive the car around and observe how they behave. If they don't stay stuck to the vent, then it works. If they do stay pressed down to the hood and vent, then it's time for a re-design.

l8r)