what's wrong with Greddy BOV?

[toshi128]

OK... i talked to greddy just now, and they said the stuttering sound is normal under low boost, and it actually is made to do so, in order to protect the turbo. However, you only want to hear one stutter sound, not the stutter"ing" (more than once). So, basically, if you hear anything other than the "psssh" or one stutter, it needs to be adjusted.

anyone correct me if i'm wrong.

thanks in advance.

 

[larryd]

Originally posted by SOURCE1064


Larry how were your times?

not good enough to discuss..

 

[darthfoul]

i could see users of the greddy type s running into a problem with venting to the atmosphere running a stock mas. If you are running the type s with the dump tube disconnected, and build a considerable amount of boost the RPM's drop really fast below 1 grand and the car wants to die. i have heard that can be compensated with the S- AFC.
james

 

[darthfoul]

i could see users of the greddy type s running into a problem with venting to the atmosphere running a stock mas. If you are running the type s with the dump tube disconnected, and build a considerable amount of boost the RPM's drop really fast below 1 grand and the car wants to die. i have heard that can be compensated with the S- AFC.
james

 

[darthfoul]

i could see users of the greddy type s running into a problem with venting to the atmosphere running a stock mas. If you are running the type s with the dump tube disconnected, and build a considerable amount of boost the RPM's drop really fast below 1 grand and the car wants to die. i have heard that can be compensated with the S- AFC.
james

 

[X|Crescens]

Well then since there are so many problems with the Type-S what would you guys recommend? 1g?

 

[1_vicious_gsx]

Originally posted by X|Crescens
Well then since there are so many problems with the Type-S what would you guys recommend? 1g?

There is not a problem with the Type-S from GReddy. It's just as good as any of them, if not better. The problem has to do with people not installing and setting them up correctly. Nobody makes a "plug & play" BOV. You have to connect it correctly and adjust it correctly.

 

[Megaman]

Originally posted by 1_vicious_gsx


There is not a problem with the Type-S from GReddy. It's just as good as any of them, if not better. The problem has to do with people not installing and setting them up correctly. Nobody makes a "plug & play" BOV. You have to connect it correctly and adjust it correctly.

very well said!

 

[jltcat]

The reason for the fluttering sound:

You let off on the gas the BOV releases the pressure build up thus "freeing" the turbo to spool again since there is no throttle any pressure the turbo now makes is just blown off. Repeat steps one through how many times it does this. Its hard on the turbo or turbos

 

[JERMS]

Ok I see hella people touchin the subject of the sputtering... Mine is doing that too.. I tried to soften the bov and it didnt do nothing.. I even changed the hose that runs from the bov to the intake manifold to a bigger one and it still does it.. the bottom one is open.. and I'm not venting.. I also have a super afc... How do I get the sputter to go away?

 

[rice_rocket]

Well I did get the Type-S and I love it. Anyways, for me it seems it sputters a bit more when it's too loose. I don't notice much a difference between the hard and soft settings however.. It's much more fun having it loose and making lots of noise. Right now I have mine adjusted on the tight side. I may just turn it up all the way (hard) and see how it performs.

 

[Rob]

Whats the difference between hard and soft ?

 

[EvoSix]

If you guys still get sputtering at low boost do what i did. As long as you don't vent atmosphere, disassemble the unit and take out the inner spring. Taking out the inner spring leaves the valve open just a bit, just like how the stock 1G BOV. It fixed everything for me. My adjustment screw was all the way out already and was still getting minor compressor surge.

I'm probably one of the few who went from a SSQV to Type-S. I did everything with it and all i got was compressor surge. I know that it was suppose flutter at low boost, but the car wasn't suppose to boggle. I ran test on the vacuum lines, ran direct vacuum to the intake manifold, and even cut the spring inside. Still wouldn't open right. But my car like the Greddy better and all the problems are gone.

 

[Rob]

Whats the difference between hard and soft ?

on the Greedy Bov i have mine set on hard is that bad ?

 

[Rob]

TTT

 

[EvoSix]

As long as you don't hear surge, you can keep it at the hard setting.

 

[candela]

How do you guys get these BOV's and not know what they do, or what the settings are for I have read over so many thread in the last 3 days about the type-s and what the setting do, so I know a search will yeild good results in this forum alone.

In a nutshell, hardening/softening increase spring pressure to hold more/less boost without leaking. Your goal should be to not have compressor surge (which isnt very likely on most aftermarket BOV's) and to have NO leaks. I would not recommend taking out the spring o the greddy unit, if thats what you want then sell yours and buy a stock 1G bov.... Most aftermarket BOV's are capapble of holding 20+ psi pretty easily, but may a be a little to hard to haev the best of both worlds and let off 3psi of boost without surging a bit.... you can adapt to the way you drive so you dont surge.

For best performance try setting it to hard setting then backing off until you dont hear anymore fluttering. If its way soft you wont know cause you may be leaking, way hard you will know cause you will hear the flock of birds flying away...

 

[Rob]

i know what they do i just want to get the best proformance out of my bov and not dammage my turbo .......and i have searched and didnt see any good info.

 

[SPEEDY]

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

Just curious Larry... did you leave the bottom line off when you had the Big28? Thanks!

 

[toshi128]

I think you're supposed to leave the bottom plug unplugged...

 

[nellystyle]

i was looking into the type-S but i have all stock except k/n intake kit, so no aftermarket ic pipes or anything. does this bov just bolt up or do i have to get a special flange? thanks

 

[Megaman]

with the greddy pipes the type s bolts right onto it. but with other pipes, ie. dejon tool, u will need the flange

 

[LTUSPE]

Originally posted by nellystyle
i was looking into the type-S but i have all stock except k/n intake kit, so no aftermarket ic pipes or anything. does this bov just bolt up or do i have to get a special flange? thanks

...don't waste your time and money until you get aftermarket IC piping....

 

[hybridGS]

My car came with the greddy type S. When I first got it there was a flutter, I reduced the spring tension and it went away at full boost. The sound also changed from harsh burst to a soft whistle. However I still have a flutter when it only gets to 5 or 6 lbs of boost. Whats the deal with disconnecting the lower hose? Do i need to close off the inlet? Also about the whole atmospheric venting situation... I have a gs engine rebuilt with an hrc turbo system where exactly am I supose to put the return line and why is this benifical to the functioning of the engine?

 

[toshi128]

You do not need to connect the lower plug, and the reason why you get flutter with lower boost is because greddy type s can only hold certain level of boost. i.e. you can only set it for low boost or high boost. if you set it for low boost, then it'll leak at higher boost... but then if you set it for high boost, then it flutters for lower boost...