Greddy BOV Type S

[juancarloszx9]

Ok here is the deal ... If the BOV valve is conected to the intercooler the car will run perfectly but the BOV will not make any sound whatsoever ... If i Unplug the hose that goes from the BOV to the intercooler. The Idle will go nuts ... but the BOV will scream beautyfully ... Obiously i rather for the car to run like it should ... but at the same time, I love that sound way too much .. plus i dont think it makes sence to have a BOV that will not make any sound ... I am pretty sre that with your guys's help i can get both ... Please help me!!!!

 

[1moreMPH]

more description or better pictures are needed at least for me. what are you ''unplugging'' and such, where exactly is the bov, do you have a correct vac source connected to the bov?

 

[2.0t03speed]

sounds like your bov is leaking at idle type-s bov's are notorious for doing that. take your bov apart and see if your rubber diaphragm has any holes in it.

 

[2.0t03speed]

do you have any flutter before the bov opens?

 

[blazinrola80]

sound like you need to relocate your maf if you want it to vent you are recyling so you wont get the sound..

 

[TXMazdaSpeeder]

I have the same bov on a hiboost fmic kit. IM also running the stock bpv along with the bov, so i get the sound of the the bov with the drivability of the bpv. works very nicely.

 

[redayax]

sounds like your bov is leaking at idle type-s bov's are notorious for doing that. take your bov apart and see if your rubber diaphragm has any holes in it.

Take apart the hole thing?

 

[redayax]

do you have any flutter before the bov opens?

I think I know what you mean.... Yes if the car is in idle it would have a very low whistleling all the time

 

[redayax]

sound like you need to relocate your maf if you want it to vent you are recyling so you wont get the sound..

Please forgive my ignorance biu ... what is the "maf". and how can i relocate it?

 

[livelyjay]

Ok here is the deal ... If the BOV valve is conected to the intercooler the car will run perfectly but the BOV will not make any sound whatsoever ... If i Unplug the hose that goes from the BOV to the intercooler. The Idle will go nuts ... but the BOV will scream beautyfully ... Obiously i rather for the car to run like it should ... but at the same time, I love that sound way too much .. plus i dont think it makes sence to have a BOV that will not make any sound ... I am pretty sre that with your guys's help i can get both ... Please help me!!!!

Here's what's going on from the limited description of your problem and your setup:

What I understand:
You have the Greddy Type-S installed replacing the stock BPV. You have the vacuum lines set up just like stock and the tubing set up just like stock as well. When you take the tube off of the Greddy Type-S it sounds nice, but the car idles rough and stalls. When the pipe is in place it does not sound at all, but the car runs fine.

If any of this is wrong, please correct me.

What the problem is:
There is no problem. You installed the Greddy Type-S as a recirculating BPV (bypass valve). The reason why you aren't hearing anything is the same reason why you don't hear the stock valve recirculating. The stock intake piping muffles all of the sound. When you take the tube off you turn the Greddy Type-S into a blow off valve, venting to the atmosphere. The reason why your car dies with this set up is because the air you are venting is metered, so the engine expects it to get there. When it doesn't you A/F goes very rich, flooding your engine.

Solution:
Don't do anything, because nothing is broken. Hearing a BOV doesn't mean it's not working. It's working better than the stock in most cases. If you want to hear it, replace the stock intake. In most cases your going to get turkey.

 

[redayax]

Here's what's going on from the limited description of your problem and your setup:

What I understand:
You have the Greddy Type-S installed replacing the stock BPV. You have the vacuum lines set up just like stock and the tubing set up just like stock as well. When you take the tube off of the Greddy Type-S it sounds nice, but the car idles rough and stalls. When the pipe is in place it does not sound at all, but the car runs fine.

If any of this is wrong, please correct me.

What the problem is:
There is no problem. You installed the Greddy Type-S as a recirculating BPV (bypass valve). The reason why you aren't hearing anything is the same reason why you don't hear the stock valve recirculating. The stock intake piping muffles all of the sound. When you take the tube off you turn the Greddy Type-S into a blow off valve, venting to the atmosphere. The reason why your car dies with this set up is because the air you are venting is metered, so the engine expects it to get there. When it doesn't you A/F goes very rich, flooding your engine.

Solution:
Don't do anything, because nothing is broken. Hearing a BOV doesn't mean it's not working. It's working better than the stock in most cases. If you want to hear it, replace the stock intake. In most cases your going to get turkey.

Something else that might be helpfull to understand better is that when the car is in idle ... if i unplug the big hose in picture #2 it will still whistle even when I am not applying any gas to it ... Do you think is leaking? ... If not can you please tell me how to "replace the stock intake". Once again I am sorry for my ignorance ... but i think i am learning a lot from you guys .. I appreciate your help!

 

[livelyjay]

Something else that might be helpfull to understand better is that when the car is in idle ... if i unplug the big hose in picture #2 it will still whistle even when I am not applying any gas to it ... Do you think is leaking? ... If not can you please tell me how to "replace the stock intake". Once again I am sorry for my ignorance ... but i think i am learning a lot from you guys .. I appreciate your help!

You should really open up your own thread, so the original poster can get an answer to his question. And before you do that, use the search feature to try and find your answer first. You likely aren't the first person to have this issue.

 

[redayax]

Ok I will try doing that

 

[1moreMPH]

you guys really can't hear your bov's if you recirculate??? cuz im recirculating my HKS right now and it's still loud as hell. But yes that sounds like it could be the issue. To vent the bov (and thus hear it properly) you must EITHER relocate the MAF so it's in the IC pipes between the bov and the throttle-body; OR run the ''dual setup'' that uses both bov and stock bpv...search for that one.

 

[redayax]

Can you please tell me what is the MAF ... Please!!!

So you guys think is not leaking?

 

[1moreMPH]

MAF = Mass Air Flow meter. it is that small black box on the piping just behind the stock airbox. Or if you have a aftermarket intake, the black box between pipes. It's purpose is to measure the amount of air entering the engine, so the computer adds the right amount of fuel for a proper air/fuel ratio.

Why relocate? 1. If you relocate close to the throttle-body it gets a better reading of the air entering the system. 2. You may then run an open-vent blow-off valve in front of the MAF. If the MAF comes before the bov in the piping, then when you blow-off that air into the atmosphere, the MAF has already measured it as going into the engine for combustion; thus your injectors put a lot of fuel into the mixture and the engine runs stupid rich, floods, and dies. If the MAF is after the bov, then only the air actually going into the engine is measured because the ''blown-off" air never passed thru the maf.

relocated maf system should go like this:
intake -> turbo -> intercooler -> bov -> maf -> throttle body

you could also have the bov before the intercooler, but most people have it as pictured above, with the MAF 5-12 inches away from the throttle-body.

 

[redayax]

Thanks buddy I appreciate it!

 

[2.0t03speed]

if your hearing whisteling at idle your bov is leaking and thats why your getting bad and eratic idle. now i dont knwo why your not hearing anything with the recirc hose on. i have my type s and when it goes off i can still hear it. you need to tighten your adjustment screw down until your not hearing that whisteling shound at idle

 

[crashkelly]

you guys really can't hear your bov's if you recirculate??? cuz im recirculating my HKS right now and it's still loud as hell. But yes that sounds like it could be the issue. To vent the bov (and thus hear it properly) you must EITHER relocate the MAF so it's in the IC pipes between the bov and the throttle-body; OR run the ''dual setup'' that uses both bov and stock bpv...search for that one.

yeah i dont know why people say they cant hear their BPVs...I have the stock BPV and I get a nice sound out of it...It doesnt sound like one of those ridiculous whistles blowing off that most people have...my stock actually sounds pretty cool...like the doors on star trek opening...i shift and its like tchksssss...

 

[TXMazdaSpeeder]

I have the greddy type-s bov and i get that crisp whoosh typical bov sound. To fix the idle issue i reinstalled my stock bpv along with it. I had tried the relocation of the MAF and the car just did notseem as powerful as it did with it in the stock position. So far im the happiest with the dual setup.