what's wrong with Greddy BOV?

[rice_rocket]

This isn't a post for help.. .I've done some searching and reading. Why are people starting to ditch the greddy type S bov's? I'm thinking of replacing my 1g BOV with it.

All I've found is some people had some throttle surge problems, or difficulties setting it up right. Other than that.. what gives?

I've looked around at Blitz SS ones, Greddy ones, Apexi, Turbo XS.... I'm not a super fan of any particular. I've heard the Greddy, it sounds nice.. the Blitz and Turbo XS seem similar in sound, and it's more "aggressive" or "sloppy" sounding to me. So, what gives?

Any comments would be appreciated

 

[Black95GSX]

From what I've seen, a lot of people "give up" on adjusting the greddy BOV -- or do not connect the nipples correctly to boost/vac sources.

that is just my experience though....

 

[rice_rocket]

Hmm, seems like there's only 2 hoses to hook up, and an adjustment screw. Heck, I've seen a lot of people not even hook up that second hose..

I think I'll settle with the Greddy, since I like that little whistle that none of the others have.

 

[crashed97tsi]

I have the greddy and i love the sound. Last night, I took the advice of someone on here and connected the bottom nipple to the compressor nipple on the turbo. The fluttering went away but now it sounds like it is too lose. I'm gonna try and adjust it tonight and see if it works alright.

I think the major thing with the greddy's is that their hard to use when you run higher boost levels. Too loose and you lose boost. Too tight and you get compressor surge

 

[cucumber]

Hmm...

I don't think there is anything wrong with it.

I enjoy mine.

 

[Black95GSX]

The only time I had problems with mine is when i connected the lower hose.... at which point it would leak over 20psi


Since then I ONLY run the upper hose -- and it runs 25psi fine at the track, and pressure tests at 34psi fine -- up untill my pressure tester exploded

 

[rdrkt]

Originally posted by rice_rocket
This isn't a post for help.. .I've done some searching and reading. Why are people starting to ditch the greddy type S bov's? I'm thinking of replacing my 1g BOV with it.

Any comments would be appreciated

People get tired of running into all the negative issues with venting the BOV while still running off the MAS. A 1g MAS is free more or less and it will boost well enough to run well into the 11s. And you wont have any other of the stupid issues associated with aftermarket BOVs. If you are only upgrading for the psssh noise then you are being dumb.

 

[jdmawd]

venting is cool, i love it. *woosh* thats as good as it gets.

 

[HyperGSX]

I love my Type S and I've had no problems with it at all.

 

[Megaman]

same here

 

[cucumber]

Originally posted by jdmawd
venting is cool, i love it. *woosh* thats as good as it gets.

:laugh: :laugh: :laugh:

 

[candela]

Just leave the bottom hole plugged and use the top and itll be fine

 

[turboedoutlaser]

i keep my bottom line dis connected, kinda sputters sometimes but i feel no power loss, plus i kinda like that "almost sounding scratchig fan sound"

 

[rdrkt]

It’s the people that say “No problem here!” that never go to the track to get before and after numbers, never visit a dyno, and don’t live in the world of empirical evidence. They are all more then content to rely on the ass dyno and use scientific measurements such as "it feels" and "I didn’t notice". When you guys join the world of numbers you will see what we are talking about. Until then enjoy your psssh

 

[1_vicious_gsx]

GReddy states in the manual "do not attach anything to the lower nipple on the BOV", leave it open. Mine works great.

 

[crashed97tsi]

Originally posted by rdrkt
It’s the people that say “No problem here!” that never go to the track to get before and after numbers, never visit a dyno, and don’t live in the world of empirical evidence. They are all more then content to rely on the ass dyno and use scientific measurements such as "it feels" and "I didn’t notice". When you guys join the world of numbers you will see what we are talking about. Until then enjoy your psssh

are you saying that the greddy doesn't hold like others? Sorry if I'm wrong but I got a little

 

[44pirate]

When I go to the track I run 21 psi so I have to tighen up the greddy, make it harder. On the street I run 18 psi so I make it softer.

 

[rdrkt]

Originally posted by crashed97tsi
are you saying that the greddy doesn't hold like others? Sorry if I'm wrong but I got a little

Its not a matter of holding the boost properly. Although from what I seen it will take some adjustment. Im talking about people venting their BOVs into the atmosphere.

 

[jw]

Greddy Type S has return for close loop dump recirculation. You can route your dump tube back to intake. The other ones you mentioned such as the Blitz SS, Apexi and Turbo XS does not.

I dont know why you said people ditching their Type S. I still have mine. Although I vent to the atm with my VPC, I am still pretty happy with it.

 

[glenneclipsegsx]

my experience with aftermarket blowoff valves is one in the same. All the ones available seem to work fine and dont leak like stock valves do. This is because they use stiffer springs that dont open up until more force (higher boost pressures) are acted on them to relieve the pressure. With any of the valves there will always be some problems with them. When u adjust the spring tighter to hold higher boost, you sacrifice some turbo response between shifts at part throttle situations when u dont make enough boost to keep the valve open. There doesnt seem to be an ideal adjustment for all conditions. So adjustment for desired driving is necessary. This is why the greddy type S valve is great. Keep it loose for driving around town to avoid compressor surge and tighten it up a bit for higher boost and wide open throttle situations.

 

[larryd]

i managed to hold 28psi last week at the track with my Greddy S Type with no problems at all.. I also do NOT have my bottom line hooked up

 

[toshi128]

Things I noticed before (venting to the atmosphere), constant check engine light, a few other and myself get P0120 when we shift at high rpm. Bad idle was another thing.

Things I noticed after (venting back to the intake pipe), much better gas mileage, about 2-3 miles gain per gallon. I got Big16G as well, so venting back to the intake pipe might not have much reason for this. I don't get the check engine light anymore. and my idle is stronger, as well.

I don't have anything connected to the lower pipe either.

 

[SOURCE1064]

Originally posted by larryd
i managed to hold 28psi last week at the track with my Greddy S Type with no problems at all.. I also do NOT have my bottom line hooked up

Larry how were your times?

 

[jltcat]

The greddy BOV once you have tuned it properly works fine up to about 400 hp then you need to move to the type R.

Attn: Turboedoutlaser

The sputter you mentioned is it more of a fluttering sound? If it is you need to adjust your boost controller or BOV. It isnt healthy for the turbo. What is happening is the turbo is spooling then the BOV releases it the turbo is free to spool again with the pressure loss then the BOV releases the pressure again over and over causing a fluttering sound. A good example of this sound is in The Fast and The Furious. When the supra is pulling up next to Vin Diesel to street race at the end you hear a nice fluttering sound.

 

[toshi128]

Originally posted by jltcat
The greddy BOV once you have tuned it properly works fine up to about 400 hp then you need to move to the type R.

Attn: Turboedoutlaser

The sputter you mentioned is it more of a fluttering sound? If it is you need to adjust your boost controller or BOV. It isnt healthy for the turbo. What is happening is the turbo is spooling then the BOV releases it the turbo is free to spool again with the pressure loss then the BOV releases the pressure again over and over causing a fluttering sound. A good example of this sound is in The Fast and The Furious. When the supra is pulling up next to Vin Diesel to street race at the end you hear a nice fluttering sound.

I have the fluttering sound problem like you mentioned. I tried to adjust both my MBC and BOV, but it still remains the same. What does it exactly caused by this? I have spoke to a few other dsmers about this subject, and they told me that it's normal for the BOV to do so. But, since I already blew my stock T25 turbo by over boosting, or maybe caused by this fluttering problem, and I don't wanna kill another turbo if this is the case. Please help me out on this subject.