|
Mark,
Not totally sure but I expect the spring tension must be overcome by a combination of higher boost and vacuum.
It should not pass air at idle nor have any effect at idle.
I think you know my position on that valve. It may help boost recovery between shifts from the air bypassed around the TP and by acting like a smaller BOV and thus offers some insurance in the event the BOV fails.
Still, if I was building a track car I would probably work the BOV side of things and remove it for the sake of simplicity. Other than that I like what it dose and might still keep it.
JFairman I believe just vents it to atmosphere so it just works as a mini BOV. Not sure if that was a test or something he has stayed with but I find the idea intriguing and logical.
The best.
|