[s-cars] Upgraded Bypass Valve

[konecc at snet.net]

I bought the Stratmosphere Hyperboost valve following a rupture of a brand
new Bosch bypass valve (same one as Hoppen sells) on my newly-chipped MTM
1+ S4.  The Stratmosphere is well-built, I can't honestly feel any
performance improvement but the shifts at max boost are smooth and I can
hear the "pssst" as the valve opens.  The original Bosch bypass valve had a
"honk" and after pulling it I found it had a leaky diaphragm.  Others on
the list have reported good results with the Stratmosphere, it's claimed to
be an improved design over the tried-and-true Forge valves (and is a direct
fit to the Bosch).  There are two springs available, I went with the softer
spring (good to 25 psig according to Stratmosphere).

-- Rich Assarabowski
   '93 S4 MTM 1+


>Could anyone recommend a replacement bypass valve for
>a chipped S6? I just chipped mine a few months ago and
>think that my stock valve might be starting to fail
>me. I have seen one offered through Hoppen that is
>supposedly an updated Bosch product made to work under
>increased stress. Has anyone tried it? Also, I have
>heard that replacing the stock valve with a stronger
>one allows more boost to be produced even if the stock
>valve has never ruptured, is this true? Thanks for any
>help.
>
>Matt Molyneux
>'95 S6 MTM 1+



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