increase psi ??

4GTuner

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FLIBYUGSR said:
i want it lookin all legal so i dont get harased and defected.
do you have a pod and bov? i wouldnt bother trying to hide it, you would prob get in more shit when they eventually find it...

but i guess the more you can hide the better.
 
abyz said:
LOL yes i know they are 2 different items. im using a black gfb manual bleed valve @15 psi... and i also use a APS BOV to support the boost. however if i put my stock bov back on as i do, it sticks to 12-13 psi.

what im trying to say is u can run a hose from the intake to actuator (without adding the bleed valve/any type of restrictor). just use the stock gsr BOV because it can only support up to 12-13psi. :oops:

I think you are getting confused, the Blow off valve doesnt determine how much boost you run it is the wastegate of the turbo, that is where the bleed valve comes in, it changes the point where the wastegate opens allowing more boost.

I think in the end just hide it under the battery or something, surely you arnt getting pulled over that much!?!
 
What your saying is your stock blow off valve was leaking...slightly.
enough to crack at 12 psi
the GFB howeever, doesnt
 
bloody hell, yes we all know turbotech is the wonder MBC but the question is:

"can the boost be increased without anything being visible"

1. put a restrictor in the vacuum line to the wastegate - -> boost
2. the factory BOV leaks at more than 12-14psi anyway

but then how are you gonna check what that boost is? ...by the non-factory boost gauge sticking in front of your nose that will attract far more attention than a pissy MBC tucked under some hose. LOL :wink:
 
Isnt a restrictor going to give you boost leak(down to the stock level), you would probably get better response and would see a higher PSI for a short time, but the pressure would eventually equalise, which would cause it to trail off(leak).

Interestingly enough a big enough restriction could cause interesting spikes in your boost curve, would spike high when full boost was achieved then taper off.

I am still learning this stuff so correct me if I am wrong.
 
no and no. with a restrictor there is nothing leaking anywhere! all you are doing is reducing flow and pressure to the wastegate diaphram (thereby increasing the threshold at which the w/g flapper opens and diverts exhaust away from your turbine)

more sophisticated controllers do the same thing for internally w/g turbos except there is improved control over the boost delivery. i just use a $10 valve between the man and w/g. when it is closed (no air) = max boost ie no w/g at all (not recommended). or i turn the lever a little to open it lets in more air to reduce the boost to whatever i want.

an inline restrictor does the same thing except the boost is set with the diameter of hole you choose. smaller hole more boost

spiking occurs because of the delay in response of the w/g and is more likely when controlling from your int man compared to straight off your comp housing (instant response = w/g cracks straight away)
 
i'm not talking about the factory solenoid mechanism that is controlled by the ecu. i'm referring to purely an MBC/restrictor inline from the intake man. to the w/g. (there are no electronics or signals involved) but yes i see what you are saying. maybe i should have clarified that.

cheers
 

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