What exactly is happening?
During shifts/letting off the throttle, it doesnt "cleanly" recirc the air. it goes "CH-CH-CH-CH-CH-CH-CH-CH". instead of "whoosh".:bowlol:What exactly is happening?
See pic please, and keep in mind this is the same location with my previous turbo setup, which worked perfectly.Where do you have the DV located?
Depends if PSI or mmHg :innocent:i think vaccum suposed to be -22 to -20
And the stock BOV does the same thing? Does it happen when you lift off the throttle after a WOT pull or only after partial throttle?During shifts/letting off the throttle, it doesnt "cleanly" recirc the air. it goes "CH-CH-CH-CH-CH-CH-CH-CH". instead of "whoosh".:bowlol:
I was using AP to measure vacuum, whatever unit it is was reading -8, Im assuming it was psi.Depends if PSI or mmHg :innocent:
I can take a close up of them and shoot it to you tomorrow, but I think the valve itself is not the issue, becuase I switched back to the OEM valve and the same flutter occured.Have you double checked the pneumatic fittings? By chance could you PM or post for me an up close of the DV?
Yes, stock BPV does the same thing. It happens at both partial and full throttle.And the stock BOV does the same thing? Does it happen when you lift off the throttle after a WOT pull or only after partial throttle?
That should be plenty, and in the case of the Synapse in pull mode there is no expected minimum pressure to make it open.Could it be that 16psi is too low of a boost pressure to open the valve?
:+1: Mine makes the same noise, letting off the throttle at partial boost. Went through all the settings and preload settings, Just started too assume it was normal.My DV does the same thing ch ch ch ch ch
That's pretty normal with any compressor bypass valve. You can get rid of most of it with a Synapse if you really try, but then you end up with the valve being so easy to open that it reacts to light throttle adjustments while you're driving on the freeway and we're right back to square 1 with a thread about how to get rid of this stupid BOV flutter.:+1: Mine makes the same noise, letting off the throttle at partial boost. Went through all the settings and preload settings, Just started too assume it was normal.
I agree that it should be plenty of boost to open the valve.That should be plenty, and in the case of the Synapse in pull mode there is no expected minimum pressure to make it open.
It sounds to me like there's something wrong with your vacuum source. You sure it's not pinched somewhere?
No, it shouldnt do that. My stock valve never did it. My DV never did it before (maybe occasionally if I let off right at the boost/vacuum transition, but thats it), but they are both doing it now, EVERY time. Somethings not right. I just dont know what it is.:+1: Mine makes the same noise, letting off the throttle at partial boost. Went through all the settings and preload settings, Just started too assume it was normal.
I've seen so many people let off at the boost/vac threshold with every shift every time they drive that I've basically assumed I'm the only person on the planet that doesn't drive that way. Especially with all the "OMG my Synapse flutters wtfbbqthisisbullshit" threads I've read.(maybe occasionally if I let off right at the boost/vacuum transition, but thats it)
LOL. I know there are a lot of these threads around. Like I said, I read though most of them and it was all the same shit. So sorry if Im being redundant here, just trying to pick peoples brains and see if there is something basic that I may be overlooking. If not, than I m just going to go through every connection and leak test it.I've seen so many people let off at the boost/vac threshold with every shift every time they drive that I've basically assumed I'm the only person on the planet that doesn't drive that way. Especially with all the "OMG my Synapse flutters wtfbbqthisisbullshit" threads I've read.