[Supras] blowoff valve recommendation

[Jeff Mohler]

I dont think its wrong..just its not an upgrade unless OEM proves actually a
problem.

No BOV will recirculate the FULL effect of slamming the throttle closed.
Its just a relief.

On Nov 13, 2007 6:49 PM, <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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