Red Sun

Hey guys I'm wondering if i get a bov on my Cobalt tc do i have to tune the ecu.. should I get it flushed or can i just buy the charge pipe and put the bov on? Thanks in advance.

Erod

moved.

CudaJoe

iTrader: (1)

you could go on this thread right above this one and get the BPV in there... you wont need a tune for that.

https://www.cobaltss.net/forums/2-0l...up-buy-236385/

Chevycobaltss3

iTrader: (2)

I think he wants sound not a hard to hear sound. And op if u go with the bov above u don't need retuned.

CudaJoe

iTrader: (1)

It's not hard to hear... its actually very audible. You need a tune for a bov... not a bpv

Kyle4236

you also need maf relocation dont you?

Chevycobaltss3

iTrader: (2)

^ yes if its not a recirc type bov and is recirced

Red Sun

What if i dont do a tune what could happen

Chevycobaltss3

iTrader: (2)

you will throw codes and of course run like crp because your ltft and stft will be off and they will never be correct since you pushing excess air in to the atmosphere instead back into the intake. if you have a recirc you should be fine. because all its doing is sending the air back to the intake chanel, like the intake tubing right before the turbo but after maf.

Red Sun

How much will that tune be

Chevycobaltss3

iTrader: (2)

depends on tuner. if you lived near me id prob charge u depending on your money issue. which is basically what i do all the time, so i say 275 will be average i usually charge 200-250 depending one what im gonna be doing.

Red Sun

Seems like a good price but I live in jax fl

Chevycobaltss3

iTrader: (2)

lol i know you should have a tuner near u. there is a thread to where all the tuners are located, get one of the tuners ask questions and get a tune.

RyRidesMotox

Terminator 2 lives in Florida, he did my tune on HP tuners. I am very happy with it. You will need a tune for a vent to air blow off valve. I have heard both ways on the recirculating BOV but I would tune it either way.

A vent to air BOV will throw you into limp mode due to metered air loss between the MAF sensor and the throttle body. There are plenty of options as far as BOVs and such go. If you are going to be running stock boost levels or keeping the stock turbo there isn't a real reason to get one other then the sound... cuz I think they sound kinda sexy. Otherwise a BOV, MAF relocation to the lower CP and a tune should suit you just fine.

whyyoumadson?

there are 2 ways to do an atmospheric bov on these cars..and then 1 other option


1. maf relocation and tune...no maf relocation will cause the car to throw itself into limp mode and cause rich spikes after every shift and the car might bog...idc how many people say they dont have problems. when you brake it down in the ecu you will see it.

2. recirculate and tune... good option aswell.

the other option.....stick with stock or forge bpv.

end of story. if you want noise put an intake on the car you will hear your bpv no problem. if you dont have any intention of going big turbo why waste the money on a bov? the forge and the stock bpv are just fine on the stock turbo.

JPizzle

You don't need a tune for a BOV.... I am running my HKS directly to the atmosphere, and it runs just perfectly without a tune. Terminator can attest to this as he datalogged my car, and witnessed it himself. MAF Relocate is a hoax.

Chevycobaltss3

iTrader: (2)

Ha ha ha ha ha ha ha^^ sure u don't u don't even have to tune urr car if u change ure intake or pistons. Lmao. And u do to. When itvents to atmosphere it skews reading.

whyyoumadson?

do you watch your wideband when it blows off? apparently not...or you dont have a wideband. you need to recirculate or you need a maf relocation. thats the end of story. you cant tune out rich spikes either.

riddle me this batman..... what does your maf sensor read? air correct? well when your bov blows off where does the air go? into the atmosphere im presuming. well the car goes...um hello where the hell did that air ijust sucked in go and has to compensate for what it lost.

RyRidesMotox

I think he was just joking, I hope.

OP if you change ANYTHING having to do with intake on this car you need to tune it. Exhaust isn't as critical but it should still be done. The MAF relocate is not a hoax. I have the treadstone kit and everything works perfect except for the MAF/ECU reading a loss of metered air. They just finished a MAF relocating lower cp and its on its way to my house for installation right now. Thats just the way the sensor works... No fault to GM or anyone else, it works very well when you keep the parameters in order and the thing will freak out if you don't and cut fuel pressure and throw you into limp mode.

Chevycobaltss3

iTrader: (2)

Yeah go with term he can do hp nd trifecta I'm sure. Take care.

09PitchBlackSS

iTrader: (1)

A lot of retards in this thread

whyyoumadson?

hes not kidding. i only know because ive gotten into this discussion with him before...what ive seen a lot of guys doing is running the bov and the bpv together...stupid imo because with an intake you can here the bpv vent just fine...no need for a bov on these cars unless your going to a bigger turbo.

who are you referring too?

RyRidesMotox

Or if you are running at higher pressures... I have heard of a few guys running a stock bpv at up to 30 psi for quite a while with no issues but I'm not sure how typical that is. I think Nick from BYT did this. The stock BPV works just fine. I like the sound and the performance or the BOV especially as a possible turbo swap nears. It's either a swap on the balt or a 57 chevy build so I'm still trying to decide.