can you install a blow off valve on the stock 2.3 setup. if so how would i go about that! im very mechanically inclined just not really keen on the turbos yet but im gettin there!
Yes you can. Most (if not all) tap into the intercooler. It really depends on your bov as to how you would mount it.
From what I've read installing a BOV after an air metering device and before the T/B can cause stumbling problems when you go back into throttle.
I'd just use a BPV (recirculating) on a stock set-up.
I thought the stumbling/stalling was caused by the bpv/bov staying open.
Shawn would be the one to talk to about this he seems to know quite a bit about turbo setups
Think of it this way..
Boost is up
You let off the gas
Bov opens
Air meter is still reading as much air as it was when the throttle was open.
Enough fuel is still being injected for that amount of air.
When you open the throttle again there would be a rich condition caused by this scenario.
Stumble....
You need to reroute the air coming out of the valve back in somewhere between the turbo and air meter otherwise it creates a momentary rich condition.
Convert to a blow through VAM...
I didn't say it wasn't possible to use a BOV on a stock system, but for the way the stock stuff is set up, a BPV works better.
You can use a BOV if you want to deal with the "quirks"
might be a dumb question but what is a blow through vam?
A stock TC sucks air through the air meter, under the air box into the turbo.
Some guys convert the setup so that the VAM (air meter) is in the charge pipe going to the intake.
What you can do with that is install a BOV in the charge pipe, but before the vam. When the BOV opens it will vent the excessive pressure but before the air meter... so the air meter still reads the correct amount of air going into the engine.
I get that. All I am saying is that occurs in BPV and BOV setups. Less often in BPV of course, but it occurs none the less. Inferior components and improper setup (not allowing the valve to close) are usually main causes.
After reading numerous topics on the issue, I have concluded that no one is really certain of the momentary rich condition between shifts. It seems to be a myth that gets passed around much like the 8.8 vs. 7.5 weight myth.
Personally I would just ditch the VAM (which is to blame) for a MAF and be done with it but then that wouldn't be stock. :p
so do we really need the vam?
Alright, i have a blow off valve on my car, and i know the Pro's and Con's.
Pro's:
-easier plumbing
-neat sound
-cleaner appearance
Con's:
-Drivability
The momentary rich condition happens wether the car is stock, or if its running a BOV. Thats a myth, but the stumble and stall issues are not a myth. Ive adjusted my driving around those issues, but anyone else who would hop in my car would stall it out once they got into boost.
The biggest issue is that when the air vents, theres nearly enough fuel being shot into the cylinders to momentarily foul the plugs, so if youre in boost, you cant press the clutch and let the car idle, it will immediatly stall. I let off the throttle, and stay in gear for a bit, so that it will clear itself out.
Another issue is starting it. The engine vacume will yank the BOV open since theres not much suction in the intake tubes at that moment, and itll sometimes stumble and stall.
Also, sometimes coming to a stop, itll want to stumble and stall, unless i ride out the gear.
MAF or VAM, the issue will persist, youre still venting metered are, regardless of how its metered. The only way to solve the problem is to run a bypass setup, or convert to blow through.
Aye sirs, danke for the lesson. :)
Say Shawn, what type of BOV do you have?
I have the HKS SSQV. I was under the impression that it wouldnt cause the issues it does, so i spent the 220 on it, but the issues are less severe with it.
The REAL reason i went that route is because its one of those most obnoxious ones you can buy ;)
would a bosch bpv work in my setup shawn? I dont want to have to sell my arm to get one I still need it to shift :hick:
If you set it up as a bypass valve, it will work very well actually. Its not the *ultimate* solution, but its better than nothing.
I'll see what I can do :D btw where did you get your cold air kit?:confused:
ebay, for a 5.0 mustang
youll probably need to buy a 3" hump hose, and do some tpuppies of one of the tubes though
Gee, it's not like I didn't mention all that. :p
If you want to deal with the issues a BOV causes with a metered system, then by all means..go for it.
I had no issues (other than not sounding "cool" ) using a BPV on the metered systems.
On the current SD system in the TBird....by all means ...sure as hell I'm gonna use a BOV......
What is the benefit to a BOV rather than a BPV?
BOV's can be less complicated in their installation due to the fact that they just vent to atmosphere.
On a system that is metering air before the BOV, such as a MAF application, when the BOV vents, it vents metered air, thus causing a momentary rich condition, which may or may not pose problems.
On a SD system, the air that is vented is not metered previously, and thus causes no issues.
A BPV recirulates the metered air back into the "system" after the meter, but before the turbo. They are also usually quieter.
Are there any performance benefits of a BOV wrt a BPV with an application that vents metered air? It seems they're mostly for show [sound].
Holy thread resurrection Batman!
Keeps all the tech in one place...now go tell the man what rear-end he needs!
Nope....
Well maybe in extreme boost situations, but for the normal folks, no.
ok buys thanks for all the very helpful info... im oing to install my bailey motorsports twin piston bov in a day or two ill let you know how it goes!!! thanks again!
ok so i installed the bov today and so far so good!! had to adjust the throttle set screw a lil but otherthan that eveythings ok!!! thanks guys