Originally Posted by sparrow

Ots none of the diffusers you see on the s2000s will produce any positive effects, their price is outrageous, and people still buy them because they look good. The J's racing looks promising but until I test it in CAD I can't say anything other then its shape is promising and that it might be worth about $150 for the effect it'll generate.

If you were that interested in saving the OP money you'd recommend a 255 up front instead of a 225 before purchasing another trunk and a wing as we can all agree that front tire width and tire compound here will make the biggest difference in lap time shaved per dollar.

For occasionally going to the track I wouldn't recommend anybody a wing or a diffuser. But for a road car I'd rather have a diffuser then a wing [If I frequent the track often enough to squeeze the last milisecond out of my alignment and tires then of course I'd realy on a wing] If I have to buy my friends at nasa cases of beer for CAD help [maybe even tunnell if I get them drunk enough ] then so be it as it's extremely enjoyable. I'll report my findings on here and put everybody to sleep, then we'll see exactly how useful/useless a diffuser on our cars is.


No I cannot save the OP any money if he's not interested to acquire the knowledge needed for such a design, and no the wing won't save the OP any money either if he rarely tracks the car ...on 225 fronts. But these designs are a very intriguing subject because their function on our cars is questionable, whereas a wing is proven performance.

In OPs case the verdict is not a diffuser or wing, but wider front tires, and stickier tires overall.