So i just resently got the desendant BPV boost gauge and nst 9.5 pully. The problem is its only reading 5 lbs. Im lost on this one but any ideas would be great. Thanks

 

What's your altitude?
Is your BPV recirculating at a lower PSI?
What Descendant BPV do you speak of?

 

Are you still using the stock bosch 102 bpv? Are you hearing any belt slippage?

 

Im in Colorado. I havent noticed any slipage at all. Desendant just came out it not to long ago. Its resurculating though. You can also adjust the spring and i adjusted it all the way out and all the way in and still nothing. I put the old 110 that i got acouple years back same thing. 5lbs. I also just drove down to texas and still the same psi.

 

I most I have ever seen from my 9.5lb pulley was 7

 

Does it read 5 psi at redline?

 

You should be reading about 7 psi, even in colorado. Make sure your belt is not slipping and make sure the bov isn't too loose. Just to test tighten it down almost all the way and see if that helps then keep loosening it till its right.

Dunn I always got 10psi on my 9.5psi pulley, but I'm in chicago

 

woah i was about to pick up one of these descendent bov (non recirculating =) ), but if it can't hold boost, why bother? lets us know

 

I consistantly see 9 to 9.5 psi on mine with a forge 007. Not sure why you guys are seeing so much less.

 

I barely see 6psi at redline with a stock supercharger setup. Really need a digital boost gauge to truly tell... analog bounces to much...

Where at in Colorado?

 

My friend was having that same problem, for him it was because the pulley side bearings went out, not sure if that's your problem too....but it may just be that the desendant BPV its just not holding enough pressure....

 

He did mention he tried the 110 and got the same result, so I doubt it's both bpvs. Stewtc, were you getting 7psi before you switched the pulley and bpv? When I swapped pulleys and used the recommended belt I had the same problem, but I definitely heard the belt slipping.

 

https://www.scionlife.com/forums/sho....php?p=3495526
^ is that the valve you speak of?

 

Yea thats the BOV. It also comes with a cap for the bov so you can cap it off if u want and it resurculates. I tried both and no luck. I turned it all the way in and nothing. I maybe....maybe get 6lbs at redline. On my way back to work im gonna losin it a little and then a little more on the way home. I dont think its the vaule though. Its just frustraining. Thanks for the input. Im in colorado springs.

 

check your gauge too, see if you can hear the bpv if your are below 0 vac, I know my boost gauge is 1 psi off and its electric most analog are 3-5 off most electric are 1-3 off, only super accurate ones are the ones with built in MAP sensors