any answers?

 

^^ its all trial and error.....i currently have the single spring mod done to my car and my idle still dips up and down when i let off the gas and stilll occassionally stalls on me. Ive tried it with 2-3 turns after contact and as much as 7-8 turns and it still does it. Im thinking of going with the Agency Power BOV, which can be 100% recirculated. But if anyone has any suggestions on the Greddy, let me know!

 

put the second spring back in and tighted to what i have done in my pic on page one

 

try it with the two springs in and then if you want the valve to open under less boost - take out the smaller spring.

 

I have mine vta and with boh springs. Runs smoothly and has a very loud wicked sound.

 

if you can fit it, use the greddy type R
no problem blowing off under light boost and it'll hold 40+psi.

dwarfs the type S

 

im trying out the Forge today on my car. Currently the Greddy Single spring.

 

I just tried the APS BOV, but ended up coming back to the Greddy. The TypeS's driveability is just too hard to beat! The APS is up for sale now.

I have the single spring mod, and had Shiv custom tune me with no mention of a leaking BOV. My power looks pretty on par, as well. The only thing I don't like about the Greddy is the little whistle at part throttle.. oh well.

 

what is the the lower nipple(smaller) used for anyways. i have my type s recirculated and was wondering why there is a smaller nipple. So do you connect it to the intake pipe or where would you connect it to?

 

can someoone answer my ?

 

I have never used the second fitting on any of my greddy bovs. I though I remember reading a long time ago that greddy recommends it be open to atmosphere. I have also heard that its good to hook it up to another vacuum source if you are venting the bov to atmosphere.

On a side note, I just tried the single spring mod today after running both springs for a long time. I am not sure what to think. Driveability is perfect, its 110% better. There is no more surging at part throttle or anything, you would think its a non turbo car. Although the only thing that worries me is that the sound is almost gone. It sounds like a really weak bov now, it doesnt have the distinct blow off sound anymore. The reason I am worried about this is that it might be already slightly open which is why it sounds like this. This would be a huge boost leak if it was the case so I am a little worried about it. I might go back to 2 springs to be safe but I hate to because driveability is so good.

 

Recently installed my Greddy Type-S BOV, with 2 springs on my EVO 7. And turned it about 3-4 turns stiffer than how I received. Reset ECU (disconnected -ve on battery for 30 sec.) car was in a low rpm/stallish mood when idling/stoping for a day then ECU adjusted and car runs perfect, no more low rpm at idle or when coming to a stop.

Had same BOV and 2 spring setup on my EVO 6 as well...no problems with that car either.

Double spring for me!!

 

what exactly does it sound like?

I just installed a greddy type S single spring, and the driveability is excellent. However, I like the sound better on the stock BOV, it has a nice whoosh sound where as the type S single spring has a high pitched chirp to it. I guess I'll just have to get used to it. I haven't tried any adjustements yet, so I'm not sure if that will get rid of the chirp.

 

question i just installed the blow off and i installed it likr the stock blow off. i have it as the needle on top of the blow off is sitting underneth the radiator tube (big black tube) im not sure if thats right, i see in alot of pictures that the vent that you can see the piston is on the intake pointing down im not sure which way is right. please help.thanks

 

I am running my 03 evo with 2 springs now, tried single spring mod but the valve just kept open and engin strumbled and bogged all the time. I even tightened the screw all the way down but still leak. i thought it could be vacuum leak so checked every pipe, valves, but no leak found. so I just put both springs back and it works fine now,~ Awesome whistle sound~~+ little whoosh sound at end. the car idles little bit unstable in low rpm sometimes(strumbling) but it's not that serious since i am running VTA mod. It was much worse with HKS bov.
why wouldn't single spring mod work for my evo????