Synapse Synchronic BOV Installed- Short Vid and Pics Inside!

[bluemax_1]

Originally Posted by oohnoo

Got a question for you guys that have this, well not really a question but a weird discovering with the Synapse BOV . I have one of these installed on my car and just got my car started for the first time. I'm running it open to atmosphere. Got the car started and doing the normal checking for leaks, etc when I noticed the bov was 'Blowing Air" out of it. I was like WTF.....I didn't have the boost source hooked up so we attached a line to that but it still did it. Tried tightening the adjustment screw and no difference.
THEN I went to their web site/forum and they say this is normal for it to be blowing out air. Definitely weird as we weren't used to seeing that. Oh and they also have a thread where they say there's no need for a air filter on it as it's always blowing air during idle and cruising and can't sucking it in.

Air blowing out of bov.


Interesting Thread
25 more HP in a twin turbo Z06 with only swapping to Synchronic BOV

I'll have to check on mine. I installed it recirc from the get-go so I never checked to see if it sucks or blows at idle.

Originally Posted by Rebel

I read that too as far as air blowing out. I see no problem with it as long as you are speed density. I am anal though and will put a filter on it if I ever decide to vent. It is supposed to hang open as part of the "better" design for quicker throttle response. Something about the engine not having to suck air through the turbo and piping restrictions. Which would mean it is indeed sucking in air at certain points right when the throttle is opened....

Bit of a different issue. Yes, according to Synapse, it's supposed to be open
at idle as the vac source to the 2 ports on the back pulls the piston back(open). It 'should' then be sucking air in which where the improved throttle response comes from, i.e. air is sucked IN through the BOV without having to go through all the IC piping.

When there is +ve boost in the manifold, the +ve pressure keeps the piston shut (so you're not leaking boost) and then if the throttle plate slams shut, the vac immediately pulls the piston open and the valve vents the boost.

On the BMW vid, the turbos on it are supposedly so efficient that at idle (and cruise), they're spooling enough to produce +ve pressure in the piping before the throttle plate, so instead of sucking air in, air is actually being blown out the BOV. This is NOT a good thing on a MAS vehicle since this is previously metered air being blown out. On a MAP vehicle, it doesn't matter, but a MAS vehicle would run rich at idle/cruise.



Bob, maybe the stroker's displacement is enough produce +ve pressure from the DR1000's? That would be pretty crazy. It would be interesting to see what the powerband would look like from your setup.


Max