its not bad, with a piston type valve if you install it so that the pressure is coming in thru the side it ends up forcing the piston inside toward one side of the valve causing it to have some drag while it is trying to open/close. doing it the right way will most likely make it sound louder, could even stop the fluttering. some people see psi differences too, but thats rare.

and yeah, any valve flutters, my valve will flutter if i release the gas pedal slowly or on rare occassions under partial throttle, but if you completely releasing the pedal quickly and generating a decent amount of boost, then it should make a solid "psshhh" noise

diaphragm valves are installed reverse of how piston valves are. this is because the pressure needs to come in from the side so that there isn't constant pressure beeing put on both sides of the diaphragm, like if you were to put the bottom of the valve into the turbo outlet hose. 710n and apr r1 valves are the same as stock, while all the piston valves should be installed in reverse

 

my stratosphere valve sputters on occasion, i would say about like chaos'


but here is my question, sorry for the jack...... but i have an older one, not the hyperboost... is it supposed to be normal or reverse?

 

piston valves are reverse than diaphragm. stock is diaphragm, so if you have a piston valve, the bottom should go to the turbo outlet hose, if you have a diaphragm valve, the bottom should go to the TIP

 

mine does not flutter all the time... it will mostly flutter when im in like 4th and 5th and im running at 17 psi and i let go of the gas... then it flutters.... But now im confused if i should try puttin it in backward or not? I think i put it the normal way... with the nipple for the vaccum hose facing up

 

I also forgot to mention that once in awhile when im in full boost on 5th or 4th gear the boost gauge needle freaks out and u could feel it too... It did that with the stock DV and does it with the one i put in too

 

bump

 

the bottom of the valve(opposite from the vacuum nipple) should be going into the turbo outlet house(between the compressor outlet and IC piping) and the side should go to the hose that goes into your TIP (between the intake and compressor inlet).

i don't know how to be any clearer than that lol


and you correct the spikiness you were talking about by installing a stiffer spring. if you have the green one in, try the yellow one.

 

Thanks chaos... your like my big brother around here... lol always helpin me out

 

lol glad i can help

 

I was reading this thread and got thinking about my Bailey DV. I looked on AWE's site and this is what I pulled off:
Should I change the way mine is oriented? Currently it is same as stock.