[Supras] blowoff valve recommendation

[Jim Jobe]

Option B has worked very well for many, for a long time.

I've also run just the HKS SSQV with no ill effects.

On Tue, Nov 13, 2007 at 09:49:19PM -0500, b2nice84 at aol.com wrote:
> The below options is using a blow off valve. 
> 
> Option A
> The HKS SSQV has an adapter you can add to be able to redirect the air back into the accordion hose.? But of coarse it costs some money and a little of thinking to install.? Regardless it is doable and you will lose the BOV sound if you care about it.? 
> 
> Option B
> Another way (this is what I am doing) is to keep the stock Bypass valve in and install the blow-off valve at the same time (blow-off valve air is released into the atmosphere).? It eliminated the bogging. The stock bypass valve keeps the AFM happy and the blowoff valve let out all the extra air out that the stock bypass valve could not (over 8 psi) when I am boosting over stock.? 
> 
> I feel the stock bypass valve works great when you are boosting stock.? But when boosting more then stock I feel it needs a little more air out that the stock bypass valve will not allow.? That is why I used Option B.
> 
> Now I am waiting for Jeff to make a comment on how wrong it is for me to do this.? hehe
> 
> Brandon
> 
> 
> -----Original Message-----
> From: berniek at technicaldevelop.com <berniek at technicaldevelop.com>
> To: Supras at supras.com <Supras at supras.com>
> Sent: Tue, 13 Nov 2007 5:43 pm
> Subject: [Supras] blowoff valve recommendation
> 
> 
> 
> For the last two weeks I've been getting my jollies by driving my '91 
> with 550cc injectors, 57 trim turbo, Walbro, Lexus, 3" exhaust from 
> turbo back, etc.  However, a disturbing boing-oing-oing sound has 
> persisted from the air intake when closing the throttle under 15 PSI 
> boost.  Spoke to James at Performance Techniques about this, and he says 
> it is compressor surge, which I suspected.  From all I have read, using 
> the Bosch Porsche right angle blowoff valve should have been sufficient, 
> but it is not.  I get the sound even at low boost. 
> 
> 
> So I'm looking for recommendations as to which BOV to use.  I would like 
> to recirculate to the accordion hose, even if I need to cut a hole in it 
> and use curved, clamped large washer-like pieces on the inside and 
> outside to provide a large bung for the BOV discharge.
> 
> 
> Any and all suggestions would be appreciated.  Thanks.
> 
> 
> BernieK.  PS:  Arlene and others were right.  There is never enough 
> power even if you can "walk" the tires in second gear.  Starting to 
> wonder what to do next for more HP. 
> 
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