An alternative to permanently opening VFAD
 

Hi All,

My car is pretty bone stock after all these years. Decided to revisit VFAD and came across an alternate method to keep the flap open. So far based on my searches here, the general consensus is either remove the VFAD altogether or remove the vacuum hose and plug the throttle body nipple.

Well I came across this alternate method from the UK RX8 club. Basically the mod is to reverse the one-way check valve. Seem like a simple method. Any thoughts?

https://cimg3.ibsrv.net/gimg/www.rx8...95539b9fa7.jpg

Explanation here: https://www.rx8ownersclub.co.uk/foru...ic.php?t=53537

People remove the whole VFAD assembly for a cleaner look, but there are several ways to achieve the same goal of keeping the valve open.
The VFAD actuator requires vacuum for the valve to close, so removing that ability anywhere will do the trick.
I don't see why you couldn't reverse the check valve to keep it open.
But I would disconnect the line that runs to the actuator at the solenoid to bleed off any vacuum that could be keeping the valve closed just to be safe (in case the solenoid is closed and keeping vacuum in the line too... forget which way the airflow goes through that solenoid).
Once its bleed, you can reconnect the hose

Do you need to start the car to bleed off any vacuum? I mean one has to remove the 1-way valve from the hoses which exposes the valve to atmosphere and therefore bleed of vacuum. Just curious.

I'd just pull the line off the solenoid, on the side that goes to the vfad. Usually when I do that I get a short hiss as the air rushes in. Then flip the one-way and enjoy your louder, less responsive car. :)

Also, remember the car stores vacuum. What's in the vacuum storage canister? Nothing! How do you know when it's full? When it's empty!

No

Which is why I quoted this: