[Cyanide]

iTrader: (3)

For those of you that have the lower vacuum port connected, where did you connect it to?

l2r99gst

iTrader: (2)

The lower port is not a vacuum port...it is meant to be connected to a pressure source.

That being said, you should try to connect it as close the the intake manifold as possible, but still pre-throttle body (or you will have vacuum when off throttle). You want the pressure going to that bottom nipple as close to the pressure in the intake manifold as possible, otherwise the BOV may not hold boost very well and open early.

Eric

ebbeast2005

iTrader: (4)

so you hook lines up to both ports! I have the big port turnning to vacume system but the small 1 i have nothing on. Im running it vta and the valve keeps opeing under low boost

chinto

iTrader: (2)

here try the single spring mod

read thru settings and enjoy


http://www.evomoto.com/tech_info.php?tPath=1&tech_id=7

ebbeast2005

iTrader: (4)

i did the single spring mod and the guy at a local shop told me to put it back in cause it was opeing with the single spring. he took it apart and said something little was wrong and he ordered a part (the bov is not 2 months old) im going back next week for him to fix it. But im still courious bout the little port should i t off a vac. line to the small port also. But thanks Chinto for the website all look over it agian and take another swing at it!

chinto

iTrader: (2)

no prob.. i have the type s installed with out the lower port connected and haveing little to no issues only when low rpm and high gear and slow throtle release i get a flutter other then that it works great.

and the lower port is spost to have preasure not vacume.. o well.. good luck.

6one9EVO

i did the single spring mod done on my greddy type s and i put about 5 1/2 turns on the screw. I dont know if thats enough but i do hear the valve opening at low boost. Whats a good adjustment?

ebbeast2005

iTrader: (4)

Yea mine flutters also.

CharlieGsanD

iTrader: (1)

though its not ideal (i plan on moving it to the Upper intercooler pipe by the throttle body) i have mine tapped into the vac line port on the turbo's compressor housing (Boost Control Input)

no flutter, no surge.... works flawlessly


if you use the anti surge port you MUST use both springs

BJai02

iTrader: (5)

i did the single spring mod, but I realized that if I blow air into the top port, there is air leaking from the small lower port. I am thinking if it's the way it supposed to be, or it's my BOV is leaky and I might want to plug the small lower port so it doesn't leak at boost (or lose vacuum at idle)?

Jakeg97

iTrader: (56)

i can blow air 2 in to the small port - and it comes out the bottom
i was told you are suppost to plug the small port or have it on a return.

BoostWhore

iTrader: (42)

So let me ask where ist eh best place to grab the positive pressure from the manifold. I thought a vacum source turned into positive pressure when you go into boost am I wrong?

GraphiteMR

iTrader: (1)

Don'e ever do this mod. I made the mistake, got a poor idle and messed up AFR's. The idle vacuum is enought to pull the valve wide open messing up your MAF metering as the metered air slips back it the turbo inlet again.

QwikEVO

iTrader: (15)

Hrmm.. I've ran the single spring and have no problems with my idle or AFR. Been almost a year since I've had the BOV on there.