can't kill turkey and i'm stalling w/ dual bpv/bov

[kicker22705]

okay so i got the dual bpv/bov setup w/ my custom intercooler, but now
i'm stalling on cold starts and i can't kill the turkey.

i used to have this setup on my stock plastic ic pipes and had the same stalling problem. i thought i was stalling b/c i had a bad expoxy job, but i'm still stalling w/ hardpipes w/ the bov welded on. some people on past threads mentioned i might have a vacuume leak, but when the techs who installed my intercooler said they hadn't noticed any. next someone mentioned i might have to screw in the bolt on my hks bov more but that doesn't help either. i tried the bolt at every setting but it still stalls.

i can't kill the turkey either. i had no trouble killing the turkey w/ my stock ic pipes w/ this setup but i can't kill it w/ hardpipes. what gives? it's set up the same way w/ the bpv recirculating hotpipe to intake w/ the bov welded on the cold pipe leading to the throttle. i used to have a loud clean hks blow off sound whether i was driving or just revving in neutral. now when i try from neutral it sounds like someone blowing into an empty glass bottle, and when under load it blows off twice and it sounds like a hybrid of turkey and hks.

thanx guys, i hope someone can figure this out, it seems to have stumpped everyone else.

 

[NoVaMSP]

IMO i say ya either got a leak , or youll have to mess with the valve a bit to get them insync again , i dont care how many valves you have recirculating , unless you have a blow by MAF on pressure side or MAP sensor. venting to atmosphere will cause problems
via stalling / rich during shifts and slowness

 

[Autox MSP]

i like the turkey. I prefer them with gravy and mash potatoes.

 

[NoVaMSP]

i like the turkey. I prefer them with gravy and mash potatoes.

gobble gobble , dont bother me none , but seriusly autoxMSP youve driven in my car, my BpV is loud as s*** right ? and im only recirculating . and i have hardly any turkey . all this stress for a louder sound

 

[Autox MSP]

your BOV sounds good. I mean stock sounds okay, its not annoying or anything.
Since MAF cars read recirucated air, its not a good idea to vent it because you will get a instant rich condition.

 

[StreetUnit]

okay so i got the dual bpv/bov setup w/ my custom intercooler, but now
i'm stalling on cold starts and i can't kill the turkey.

i used to have this setup on my stock plastic ic pipes and had the same stalling problem. i thought i was stalling b/c i had a bad expoxy job, but i'm still stalling w/ hardpipes w/ the bov welded on. some people on past threads mentioned i might have a vacuume leak, but when the techs who installed my intercooler said they hadn't noticed any. next someone mentioned i might have to screw in the bolt on my hks bov more but that doesn't help either. i tried the bolt at every setting but it still stalls.

i can't kill the turkey either. i had no trouble killing the turkey w/ my stock ic pipes w/ this setup but i can't kill it w/ hardpipes. what gives? it's set up the same way w/ the bpv recirculating hotpipe to intake w/ the bov welded on the cold pipe leading to the throttle. i used to have a loud clean hks blow off sound whether i was driving or just revving in neutral. now when i try from neutral it sounds like someone blowing into an empty glass bottle, and when under load it blows off twice and it sounds like a hybrid of turkey and hks.

thanx guys, i hope someone can figure this out, it seems to have stumpped everyone else.

Can I see a few pictures of your setup...

 

[Notorious]

i know you probably dont want to hear this, but i really think your still leaking somewhere. Unless your maf is jacked up. If possible to a pressure test with an air compressor to find the leaks. It's easier to find leaks with the motor off.

 

[kicker22705]

i'll try to get some pics asap. i don't have a digital camera.

would the placement of the bpv/bov have a significant role in this. my bov is approximately 12 inches from the throttle and the recirculating bpv on the hot pipe is like 19 inches away from the turbo.

 

[Notorious]

as far as placement youre ok.

 

[NoVaMSP]

maybe a little but not a whole lot honestly 1 valve is sufficiant to release the measly boost were running , people would run that same valve for as much as 20psi +

 

[Pkay]

depends on whose advice you followed.... if you follow 505zooms setup you should be 110% fine.

If you're stalling the only things i could think of would be

1) bpv is on backwards

2) one of the IC couplers is not tightened or has come loose

3) you should have had to have a flange for the BPV welded onto the hardpipes... if that weld is bad that could be your problem

4) intercooler could have numerous issues wrong with it. Is it a custom FMIC or bought from a legit known vendor?

 

[kicker22705]

here is a pic.

 

[505zoom]

I missed this thread untill now. Your setup looks good, the only thing I can suggest to you is to try hooking up your vac assembly different. Run the BOV and BPV off of the brake booster line, and then run a untapped line to your wastegate from the manifold.

It will look like this:

 

[Autox MSP]

All this dual bpv and bov treads are pretty damn ricer like!.

Okay the MAF send the fuel by seeing and checking how much air is going in to the intake. Lets say your running 12psi then shift. While all that air is exited out of the BOV your ECU thinks its still has the air coming and will send fuel to compensate. You will get a instant rich condition and will bogg or shut down. If you dont bog thats fine but either way your not getting the performance like you should. The BPV serves a function and it does it fine.

If you wanted a bov so bad, the srt4 has a map sensor and you can do that all nite long.

 

[NoVaMSP]

All this dual bpv and bov treads are pretty damn ricer like!.

Okay the MAF send the fuel by seeing and checking how much air is going in to the intake. Lets say your running 12psi then shift. While all that air is exited out of the BOV your ECU thinks its still has the air coming and will send fuel to compensate. You will get a instant rich condition and will bogg or shut down. If you dont bog thats fine but either way your not getting the performance like you should. The BPV serves a function and it does it fine.

If you wanted a bov so bad, the srt4 has a map sensor and you can do that all nite long.

i agree 110% how ever some of these guys are running pretty fast times venting, id be willing to bet that they would be faster and run better if they would just recirculate.

 

[Autox MSP]

have you tried venting your turbosmart bov and see if you can feel any difference?

 

[NoVaMSP]

have you tried venting your turbosmart bov and see if you can feel any difference?

yep ive tried it vent only, vent/recirculate 50%/50% and recirculate only
i was getting poor response from the valve. the by pass side would release its air . and not have enuff left over for a good Vent . when i loosen it up for better response the bypass side opens too early.
it ran like ass . most noticably was slow after a shift .then once it would spool up again it felt fine. right now im only recirculating and the valve works better and
my car still feels like its got some pull after a shift
oh that and venting it would stall after shifts etc. unless the BOV was butt tight

 

[StreetUnit]

what size are your pipes? If they are 2.5 inch, you will be losing pressure. That is where you may find your problem.

 

[Autox MSP]

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A BOV and a DV more or less the same, and perform the same function. The difference in terminology is pretty much meaningless. Where people get their undies in a bundle and or burned is the issue about venting to atmosphere or not. With a closed, MAF-based system (such as my current motor, a 1.8 litre turbocharged Audi), venting to atmosphere will cause the motor to run rich. Period. Venting a BOV/DV to atmosphere simply to make more noise is one of a number of definitions which puts the owner of that car into the category of "ricer".
The ECU meters incoming air via the MAF, and using inputs from the MAF, TPS, MAP (if so equipped), RPM, O2 sensor(s) and who knows what else determines how long to fire the injectors. If any of that metered volume of air is vented to atmosphere, the ECU has no idea that it's lost some air and will fire the injectors long enough to match the volume or pre-metered air. Result? Rich condition.

 

[505zoom]

All this dual bpv and bov treads are pretty damn ricer like!.

How so? Getting better performance out of a better aftermarket BOV? RICE? Maybe you need to read the definition of rice thread again.

Okay the MAF send the fuel by seeing and checking how much air is going in to the intake. Lets say your running 12psi then shift. While all that air is exited out of the BOV your ECU thinks its still has the air coming and will send fuel to compensate. You will get a instant rich condition and will bogg or shut down.

Thank you captain obvious... I think I finally understand the way that this setup works.(thought)

If you dont bog thats fine but either way your not getting the performance like you should. The BPV serves a function and it does it fine.

Have you tried the different setups? Do you have a WBo2? I have, and I have found that running the BOV/BPV setup makes the car go no richer than mid 12:1 while shifiting. That is fine, and with the vac signal coming from the BB line, it works even better than it did on the original setup.