Full Power

Please help a TNG ( Turbo- New- Guy ) out with a basic understanding of the proper operation and set up of a Huron Speed V2 house brand Blow Off Valve, mounted in cold side pipe, about 8 inches from Throttle body, BOV is WIDE OPEN at idle, meaning wide open UNFILTERED air straight into engine.
I have BOV TEE'd into manifold vacuum along with Wastegate and Fuel pressure regulator.
Out of the box presumably with the lightest springs... what's my first move? Heavy springs, or should I source vacuum( boost) somewhere else, besides MANIFOLD ?
Pretty near stock motor here, 5.3 liter, VSR7875 turbo, mild TSP 208/214 duration "low lift" cam, expect a STRONG vacuum signal at idle, around 40-ish kPa befor the turbo installation.
SO, what do I expect ? Wrap a dust filter around the BOV, add springs, or am I just plumbed wrong ?

ScottStaypuff

Is it closed with engine off? Might just need the stiffer spring if that is the case.

Full Power

Oh, the BOV snaps shut instantly if I pull the vacuum hose off.
.
Are we supposed to run "ported vacuum " ?
Where is proper vacuum source for BOV ?
No instructions furnished with BOV. Couple extra springs, o-ring and a clamp. that's it.
The good news is, I made it to the gas station, got 8 good heat cycles, 6 coats of Ceramic VHT paint on the turbine, and first oil drain is totally CLEAN, no chips or debris.
Transmission shifts nice. VERY quiet through stock Suburban muffler.

gametech

iTrader: (1)

You need manifold vacuum for the BOV to operate correctly. It appears that you just need to install a stiffer spring.

Jwooky

Just put in a heavier spring if you are concerned.

It’s a highly debated topic, some believe they work best when tuned to start opening at idle.

Kfxguy

iTrader: (1)

My BOV has a screw with a jam nut in the middle of the top. Turn it in for more spring pressure, loosen for less. You want it to barely stay closed at idle and open up under higher vacuum, like when you let off...throttle blade closes and the engine is under higher vacuum than idle...it pulls the valve open and allows the boost to "blow off".

if you don't have this screw, you'll need to change the spring.

LS1Formulation

iTrader: (13)

Good thread! I'm going to be putting my cold side together soon and was wondering about this myself, as I have the same BOV.

Full Power

HS 50mm V2 piston BOV, installed RED spring today, stays closed at idle.
Pretty sure I heard a little "whoosh" as throttle closed, 4000 rpm first gear.
Next step: 60# Deatsch injectors going in tomorrow.

LQ4-E39

iTrader: (7)

Stock Suburban muffler? What kinda vehicle/swap?

Full Power

03 Suburban. 5.3 mouse motor.
TSP 208/214 .550" Low Lift cam
3.73 gears
VSR 78/75