RX7Club.com - Mazda RX7 Forum
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RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)
-   Race Car Tech (https://www.rx7club.com/race-car-tech-103/)
-   -   It-s Headers/ Exhaust (https://www.rx7club.com/race-car-tech-103/s-headers-exhaust-447329/)

C. Ludwig 08-29-05 05:47 PM
Originally Posted by theantirotor
I know this is pretty old, but the post was brought up so I figured it was ok.


anyways, I am like 95% sure that expansion chambers are not allowed in ITS class.

You'd have a 5% chance of being right then. j/k :) Exhaust is free in IT. As long as the car meets sound regs and the exit of the exhaust is legal according to the GCR. What is your reasoning behind thinking that the exapnsion chamber would be illegal?

jimeby 08-29-05 06:38 PM
If the expansion chamber is designed "just right" for the rotary application, a negative pressure pulse would be presented at the exhaust port just as the port is opened. This is only effective at a small RPM band.
Cheers,
Jim


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