RE: BOSCH blow off valve

[Avi <Avi@cosmoslink.net>]

Glen,
This afternoon I tested the Bosch valve with a calibrated gauge (attached
to a regulator), results are:

1.valve is totally closed up to 5-6 PSI
2.valve start to open at 5-6 PSI
3.valve stays partially open till 20PSI (did not test it any higher)
4.valve opens with vacuum (max opening)
checked two (2) valves side by side, both react the same

Conclusions:
1.valve is not a positive shut off, keeps bleeding after 5-6 PSI
2.since valve is not a positive shut off, it should last a long time....
(my experience says otherwise?..)


That is the latest for now, more (maybe), to follow

Avi



At 08:44 AM 12/24/97 -0500, you wrote:
>
>My guess is that the cross-sectional area (flow capability) is not enough
>given the volume of gas that must be recirculated through the turbo at
>high boost and high turbo RPM.
>
>I am very interested in the subject 'cause I plan to add a blow-off valve
>to the KUQEFH and possibly also a bypass-valve, so I would like to
>hear about the experiences of others and good and bad of different
>approaches.
>
>-glen
>
><You can use to valves in parallel (Bosch)if you so desire, but why? the
><Bosch can handle at least 12PSI and i think Igor is running 18PSI are you
><planning to run  more than 36PSI ?........ your rubber components will have
><a hard time holding up......
>
>
>