I just recently purchases a synapse Bov and have it mounted on my uicp recirculating back into the intake. I have port A and B as vac and c boost only source. It seems to flutter with the slightest raise of accellaration and release while in gear or shifting. I've also tried port A open, B vac ,C boost and B open, A vac and C boost. I've also tried loosing the preload with all combinations. Still no improvement with surge

 

call me ill help u out
i hate mine though

 

How many ports does your Synchronic BOV have? 2 or 3? There's no way for it to be releasing under boost.

If you have a 3-Port BOV, make sure that you aren't getting boost-only for Port C after the restrictor in the OE line.

Now a way to test if it really is the BOV that is opening, vs true compressor surge:

Disconnect all lines to the BOV, it will act like there is nothing on the pipe. Yes it will flutter when you let off the throttle. But if it surges while you are on the throttle, on boost and the boost gauge goes crazy, then the BOV has nothing to do with it. It is actually compressor surge.

 

ok so I just have it vta and it works alot better. I have A open,B vac, C boost and have the preload as loose as it gets. works great except when at a stop it some times falls on it's *** but picks itself back up and seems to flutter while goin up hills and letting off the throttle while in gear still. other than that it works great.

 

It is falling on its *** because it is VTA. You have to find a way to re-circ and have it still work some how. Try my test above to verify if it is really true, bonified compressor surge. There's no BOV that will fix that, unless it leaks under early boost, which means it will leak even more later.

If it is true compressor surge, the fix is a little later spool by dropping the duty cycle to the WG solenoid, or just changing your driving style to drive around it. ie downshift.

 

Ok I'll have to try sometime this weekend

 

updates????

 

no updates yet...just waitin on my tial 50mm v-band clamp so i can relocate the bov and recirculate it. i'll let you know thursday when i get it.

 

recirc + tial 50mm? Or are you still using the Synapse?

 

I just bought a Synapse BOV, I will post my results.

 

yes im using the synapse bov, i had to order the tial 50mm vband clamp and synapse tial adapter so i can use my synapse bov on the tial 50mm flange. You follow me? haha

 

I feel ya, and figured you were referring to something like that. Interesting. I wonder if there is some setup like that for the APS.

 

my synapse is setup perfectly and has had no problem for the past 6K miles I've had it on. They say not to mess with the preload