Post by
darkforcejackal »
https://forums.nicoclub.com/darkforcejackal-u12107.html
Sun Mar 19, 2006 12:33 pm
I have the IAP kit, and the exact same situation as you.
When I vent, the RS works fine (with the vent piece). Blows/opens at just around 0-1 PSI. When I recirc at the same setting (medium stiffness, both springs inside), it needs adjusting to idle properly (loose stiffness, only one spring inside). But even then, it SOUNDS like compressor surge.
That said, I recirculate to be safe and because idle goes wonky and stall-happy when venting.
My theory is that either:
a) the recirc piece and hose size is too restrictive to completely release all the air required in timeb) the entry point/angle in IAP's setup of the recirculated air actually induces a little bit of surge ("half-releasing" if you will)c) the setup (and flutter sounds) only SOUND like compressor surge, sufficient air is released and just makes a funny noise entering the intake pipe that is heard through the air filter
Good luck and let us all know if you find anything as well.