Just got my Synapse Engineering BOV and am blowing it off to atmosphere until i modify the intake for recirc. Anywho with stock tune, turbo will hit 26psi. Wondering why boost gets so high and im still running a line to the stock bypass valve. Also blowing off to atmosphere is ok for the car, only ok, a second after blowing off the engine bogs pretty good, when resetting the a/f. Going to take it to Synapse Turbo later, a tune will get rid of this high boost right??? It only hit 26 for a second, got below 23 fast enough to not set in a CEL. Any info would be much appreciated. Thanks

 

bump

 

i would also like more info, only because i'm getting a bov on wed. and am curious

 

that's weird. I have a hks BOV and never had that problem before I got my tune.

 

People underestimate the importance of the BOV.

 

people underestimate the radical changes an atmosphereic BOv makes on a car engineered for a sensitive recirc system

 

i heard as long as you dont stay above 23 for more than a second or two its fine. it just has to settle back to 23 or less. as for the bogging this is the first case of that i heard.

 

if ur car isnt tuned to blow off to atmosphere, that will probably happen. Same thing happened on the talons cause they had their maf before the turbo so when it blew all the air off it would bog cause it i guess didnt have an air charge for a second. but as soon as i put a gm maf on the upper intercooler pipe and tuned it, problem solved, so dont blow off to atmosphere unless u have it tuned for it. cause its tuned to recirc.

 

Ok, i have all the stuff to run the blow off valve to recirc, but will that prevent me from overboosting? seems like it shouldn't change it at all. The blowoff is after the turbo hits 26psi so it seems that where the air goes would have no affect on boost pressure. It will run smoother once in recirc but will max boost go down??? What exactly limits boost from going any higher, is it the blow off valve partially opening or what? With all this said, i tried to remove my stock turbo with BTFs upgrade turbo. I could not get access to the last 3 bolts on the cast iron elbow so i had to tighten up the stock turbo, is there any chance that maybe i missed a connection even though no CEL is present?? or maybe splicing into my wastegate actuator line for the C port on the blow off valve? or splicing in the line to the bypass valve??? Thanks guys

 

How did you hook up the vacuum lines? Are you running a block off plate on the stock bov?

 

Mine doesnt bog at all but it looses pressure at about 12psi when i should be hitting 20 since im tuned but i think its a bad BOV. Will find out tomorow

 

Theres 3 ports to the synapse bov, port c is spliced off from the waste gate actuator line, the other two are spliced off the bypass valve and im still currently running the bypass valve. I have hahns block off plate, but did not install it yet, would that make a difference????

 

i am wondering the same. I have mine set up like yours but I ordered a block off plate and am going to see if it makes a difference

 

let me know if recirculating it works because I am trying the same bov right now and I think you are going to have to buy the anti-stall kit no matter what.
AND why are you running to bovs that is unneccasary.
I tried all combinations of boost vacuum even tried using a check valve for a vacuum only source I could not get it to work correctly but I found the problem.

THE PROBLEM WITH IT IS AS FOLLOWS

if you hook it up to where the stock bov was connected at the solenoid it will not see vacuum at idle and it will vent when you shift. as long as you shift fast it works pretty good. what the issue is with it is IT GIVE IT A 1.5 - 2 second vacuum signal

IT HOLDS IT OPEN TO LONG when you shift causing the car to bog then pick itself up when it closes.

Can anyone tell me if the tuners can adjust this maybe they can make it like a 1 second signal or .5 second. That would work to correct this issue I believe.

BTW you do not need a block off plate................]

hook your stock bypass valve to a boost only source like from you lower intercooler pipe and install a check valve so that it will not ever see vacuum or loose its pressure.

IT worked great on my car.

 

3 ports on a bov, wtf? Never seen anything like that.
Since a bov normally has nothing to do with overboosting, this one however seems to tap into the wastegate actuator line for some reason, and the wastegate actuator is what controls your boost. Either you have a leak somewhere there on the tee or vacuum line or maybe in the bov, i dont know. But i'd check for problems there first.
Also install that block off plate.

 

Jerad, sounds like there is a leak in the signal line to the gate.

I got your message, I'll defintly install her for you.
Call New Era on monday to schedule the install.

 

synapse bov, it has two ports that are spliced off of the bypass line and the third off of a boost only line. The owners manual says to not tap off of the wastegate actuator but on youtube on their videos it says to do so. basically i need a boost only line, where can i tap into on the stock wiring?????

 

Boost only source can be found on the cold side intercooler pipe beside the tmap sensor.

 

you can find all the ports you need to tap at the stock solenoid on the right side of the intake manifold.

 

stock bov ftw

 

got it, thanks guys

 

dont you mean recirculating bypass valve? Or is it just me

 

that helps a lot thanks I didn't know the stock one worked

 

ohhh... whoops...

stock rbv ftw

 

ut oh it seems as though I have this problem too. I think I have just fixed it tho. Need to go on a test drive