Lookie Lookie what I found...

guess this is old news!!!

https://www.s2ki.com/forums/index.php?showtopic=126013

Also, the swiss cheese holes they drilled throughout the car decrease weight while adding to the structural rigidity; pretty cool concept... see, every hole isn't just a hole--the edge is beveled inward. If you have a flat piece of sheetmetal, you can twist it, using torsion (I think), rather easily. Drilling a hole adds to the problem because there is less material to resist the force against it. But beveling the edge of the hole makes the hole rigid, causing the metal to have to bend AROUND the hole, which is much more difficult to do. This makes the metal more resistant to twisting than before the hole was drilled.

maybe "beveling" isnt' the right word... but I hope you can visualize this... the hole's edge is bent inward.

 

Also in a lot of the places you see holes that is 2 layers of metal. Instead of reinventing the wheel for stiffeners, in a lot of places they simply bought another factory piece and welded it on top of the piece already there.

 

What's amazing is that with all that work the ASM car still beats it in time attack.

The engine was actually heavily modified, but still NA. ITB's, custom exhaust, AEM ECU, etc.

 

Opera does exist; they are a very small company located in Japan. Due to their size, it's probably why most people give us clueless stares when we talk about Opera.

 

Actually it ended up being 2167 after they were done (although they exagerate it by saying the car started out at 2967 or something, which is almost 150 pounds over what the S2K weighs).
Amazing car, not a ton of horsepower (~275 at the flywheel) but they said it laps Tsukuba around 1'01.00

 

They only did that on the RSX featured in the magazine, not to the s2000.

 

That's incorrect. Material was added to the S2000 as well.

And the beveling is called chamfering.

 

opera also prepared the asm car so the chassis is likely to be similar.

 

Not to mentione ASM is a widebody and claims over 300hp (crank) opposed to Opera's 270hp.