Question regarding BPV
 

I got my car street tuned two months ago by will at Purple Drank (Awesome Guy) and I am running a turbo smart dual port with the recirc plug so it's running full recirc. It's set to the stiffest setting with the spring all the way tightened and my car feels like it doesn't release enough pressure even easing off of the accelerator. Now if I change the spring tension to make it looser, will that affect my tune at all? I know running VTA makes the car run rich and messes with fuel trims. I just don't want anything to mess with the tune because I love the way it runs. Any info is appreciated. Thanks guys and Merry Christmas.


Sent from my Tubesteak

why don't you contact will and ask him......

Question regarding BPV
 

I did and he said he wasn't sure, just wanted to get some other opinions.


Sent from my Tubesteak

Hmm. Try it. Shouldn't change anything unless u go too loose and it won't hold full boost

Of course it won't release enough pressure if it's too stiff. By making it stiffer or less stiff you only control the opening point as well as the progressiveness of the way that valve opens. Setting it to a softer point will NOT affect the way your BPV holds boost but will allow a better pressure excess bleeding when you reduce suddenly the acceleration or enter engine braking by completely releasing the acceleration pedal.

That is what the BPVs and the BOVs are for: to release the excess of pressure build up before and after the throttle plate. If you set them to open too late it will defeat their main purpose. A stiffer setting does NOT mean they will hold more boost, only that they will hold more pressure against a capped spinning turbo.

If you want to vent to atmosphere a 50/50 setting is the best you can get while not compromising entirely how the engine runs in low boost or idle. Get a Stratified Guardian Angel to tune that if you want full atmosphere vent.