View Full Version : Greddy Type S
Hey Tobi, just put in my BOV and I think that there's something wrong with it. I've adjusted the spring, and can't fix it. It's holding boost just fine, but the sound is killing me. This is not the way that I remember a Type S sounding like. Any thoughts?
David
01-25-2004, 03:13 PM
what exactly does it sound like? what is your setup at what PSI?
Pretty much stock Evo 8, 20-21.5 psi.
I took out one of the two springs inside the BOV. With both in there and the adjustment screw all the way out, I'd get compressor surge.
Sounds like a VERY high pitched whistle. Reminds me of this long tube I had as a kid. Swing it around and it'd start to create a whistling sound.
forum
01-25-2004, 04:07 PM
as far as I know thats what the type-s -sounds like. at least every one I ever heard did
Here is what I thought that it was supposed to sound like.
http://www.935motorsports.com/media/mark7m001.mp3
Mine sounds nothing like this. Mine sounds like a cat being gutted alive compared to this.
That doesn't sound like a type S at all, at least any type S that I've heard up close & personal.
Do you have a sound clip of what it's supposed to sound like? It did make this type of sound with both springs in, but, I also had compressor surge. After taking one out, the surge went away, but the sound has gone to hell.
David
01-25-2004, 04:53 PM
Its supposed to sound like a whoosh (atleast from what I have herd) You might try calling Greddy about it, unless one of the turbo guru's knows what it is :confused:
sounds like your valve isn't opening up
sounds like your valve isn't opening up
Wouldn't I see compressor surge when I shift under full boost?
Got a "for instance"?
Wouldn't I see compressor surge when I shift under full boost?
No. When I bought the supra a greedy "s" valve was on there, and it sounded nothing like that clip. When it opened up it was more of a chirp, and not just a single blast - 4-5 small chirps.
I good friend has (had?) one on his DSM and it also chirps.
Do you have a sound clip of what it's supposed to sound like? It did make this type of sound with both springs in, but, I also had compressor surge. After taking one out, the surge went away, but the sound has gone to hell.
So mine still doesn't sound right then. Mine is creating one long very high pitched ear piercing whistle. If it wasn't snowing so bad, I'd go out and video tape it. I think that the valve is serving its purpose and functioning properly, I just can't stand the sound it produces.
What car is it on? Are you recirculating it? If not, do so and it'll quiet down considerably. Is it flange mounted, or do you have the 'general purpose' adaptor which fits in place of the flange?
BluByU
01-25-2004, 07:13 PM
Do you have both springs in there? I had a bunch of probs with mine when it was on. It either didn't open much, or stayed open whistling the whole time I was on the gas and not holding boost. My car is only on 5 pounds so far. I tried just one spring and that held it open. That thing was a bitch to adjust and I ended up getting a HKS SSQV. MUCH better sound but we all know it's how the valve works not the way sounds is why we get one in the first place. The HKS dosent leak or anything and I can vouch on why it's the most recommended.
I couldn't stand that BOV myself. The whistle drove me off the wall
The car is an Evo 8, and yes it's recirculated and I have a flange that allowed me to hook it up to the stock IC piping. I have one of the springs pulled out and it operates fine. Doesn't whistle until I shift or let off the throttle, like it's supposed to. It's just the damn noise it makes, makes me cringe every time I hear it. I'll play with the adjustments some more, see if I can get it to go away. Depending on the weather tomorrow, I'll try to get some film of it. You guys will agree that a BOV should not sound like this.
HONDA GHANDI
01-25-2004, 11:04 PM
It may just be opening far enough for air to escape but causing turbulence. I just took one off a car the other daybecause it sounded like shit, replaced it with the HKS. sounded much better and the comp surge went away too.
you were telling me that if you dont recirculate it it throws a code right?
you were telling me that if you dont recirculate it it throws a code right?
There were some guys that would get a random misfire or a knock code when they VTA'd the BOV. I didn't even want to screw with it, so I opted for the recirc. kit.
I think I'll just keep screwing with it and see if I can figure it out. Thanks for all the input guys.
935motorsports
07-20-2004, 01:54 AM
Here is what I thought that it was supposed to sound like.
http://www.935motorsports.com/media/mark7m001.mp3
Mine sounds nothing like this. Mine sounds like a cat being gutted alive compared to this.
Hi, I just wanted to report that the sound clip you hear is in fact a Greddy Type S on a 88 Toyota Supra Turbo @ 14 PSI.
The owner also had a surge problem and this is how we fixed it. Connect the turbo pressure side (before IC) port somehow to the lower nipple on the Type S. When vacuum hits the top port the pressure difference on the lower nipple help lift the valve where it normally wouldn't lift fully. You only need to do this if you have a surge problem.
You may find that it operates better for you this way. These problems with the Type S usually occur in cars with long turbo piping systems such as Supra or Evolution. You can also try the spring trick and/or giving the Greddy a stronger vacuum single from the manifold.
Any more questions please let me know.
Robert Pina
www.blowoffvalves.com
MKIII-Shoopra
07-23-2004, 04:28 PM
Hi, I just wanted to report that the sound clip you hear is in fact a Greddy Type S on a 88 Toyota Supra Turbo @ 14 PSI.
The owner also had a surge problem and this is how we fixed it. Connect the turbo pressure side (before IC) port somehow to the lower nipple on the Type S. When vacuum hits the top port the pressure difference on the lower nipple help lift the valve where it normally wouldn't lift fully. You only need to do this if you have a surge problem.
You may find that it operates better for you this way. These problems with the Type S usually occur in cars with long turbo piping systems such as Supra or Evolution. You can also try the spring trick and/or giving the Greddy a stronger vacuum single from the manifold.
Any more questions please let me know.
Robert Pina
www.blowoffvalves.com
SUPRA's PWN :-D
STIBungy
07-23-2004, 06:12 PM
Not banged up ones. :p
MKIII-Shoopra
07-23-2004, 06:50 PM
Not banged up ones. :p
ha the damage done to my car is weaksauce compared to the damage done to the prelude that hit me.... the preludes front end was completly flat... i got a couple dents a bent a-arm/ a little frame damage
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