GT86 CS-R3 Rally Car - pics and pricing announced

[LoCo]

Originally Posted by Superhatch

I've always wondered how that improved performance. I've heard it's just easier to change because they get so hot with boosted exhaust temps on the WRC cars. But this is an NA 250hp car, what performance gains can be had, and why don't any aftermarket exhausts take advantage of this?

I'd guess because there's two options - you want performance on the street? You get a de-cat...

You wanna be legal and run a catalytic converter? I'm pretty sure you don't wanna run it so you have a red glowing light behind you (which the cat is at operating temperature).


And what's performance related - I'd guess it's simple physics. By the time the exhaust gas reaches the cat at the end of the pipe, it loses a lot of it's temperature and it's velocity meaning the further you move the obstacle away, the less backpressure you have on the engine hence improving performance and reducing temperatures.

[mike the snake]

The cats get glowing hot mainly from a chemical reaction if I'm not mistaken.

I've never seen a cat so far back in the exhaust that the glow could be seen from behind.

[mav1178]

More pics from over the weekend:

https://www.facebook.com/media/set/?...30359950330628

-alex