mikegarrison

When it comes to aerodynamics, form *is* function.

triman54

Is this the new S2000 Superleggera?

krazik

mike how would you do it? I know edges suck for drag. 1 big hole? Maybe a horizontal narrow cut?

qsmarcei

How much does it weigh roughly?

blackey

The last scales showed it at 2420, but I don't believe them. SCCA is this weekend, so I can get a real weight. I would guess 2500.

krazik

w/ or w/o u?

mikegarrison

First you figure out now much air you need, so you don't make your hole any bigger than it needs to be.

Then yeah, you generally don't want to just make sharp-edged holes. There are NACA tables from the '20s and '30s that tell you what the best radius should be. And yeah, one oval hole should be better than three round holes, generally speaking. You will lose less pressure going through the hole, which means the air will be able to flow past your radiator more quickly, which means you should get more efficient cooling.

And I have no idea what the holes on the top of the front are supposed to be doing.

This is all sort of off of the top of my head. I would have to think about it more if I were going to do it to my car. That part of the nose is very important for front-end downforce.

TJ Stooker

Bill,

Make sure you install mesh behind the holes to protect the radiators. It would suck to lose one of those coolers soon after you did all this work.

-Derek

GEARHEAD

The key to getting additional air flow for cooling is to utilize the high pressure in the very front of the car to shove it through the front and use a low pressure area to evacuate it out the back (suck it through). It's really important to seal the edges of the intake/grill so that all the pressure is forced to act against the radiator. The radiator is a restriction and the pressure will escape using the path of least resistance.
In this case, I'll bet a lot of the pressure escapes out of the top holes being that the pressure is lower in that area (air is accelerating).
A few things I would do to increase cooling efficiency:
1. Vent the hood to utilize the low pressure to extract air from behind the rad.
2. Seal up the perimeter of the rad./oil cooler
3. Add some fairings to make a smooth diverging cross section from the grill opening to the radiator extents. You want to use a smaller opening to prevent the air from hitting the radiator restriction and reversing to flow back out. The stock opening is actually very well sized but the transition is a bit abrupt which will cause more turbulence, however, it also may act an anti-reversion chamber to prevent backflow.
BTW blackey, great car. Thanks for sharing.

CourageOO7

I cannot wait to see this thing go like stink! Way to go Blackey!
Give us some specs on the turbo/engine setup, suspension, etc...

I have been dying to see a reliable turbo S2000 setup get made...giving me the excuse to make the jump.