[s-cars] Bosch bypass blowup

[Rich Assarabowski]

Running stock engine with the 3 bar MTM Stage 1 ECU (22-23 psi on my gauge).
I think the stock valve would be OK, but I certainly plan on reinforcing it
with some epoxy at the seams when I get the replacement.  Not much to it
inside, just a spring and diaphragm, seat is plastic.  Pretty cheap (you get
what you pay for), I guess it works OK from the reports I've read  which
compared it to the aftermarket performance valves (Forge, etc.)

-- Rich


>Rich:
>
>How much boost did you hit?  Are you running RS2 mods on the car?  I've got
>a -110N valve myself, ready to put on, although I also considered the
>Stratmosphere valve.  Maybe I should just save the $30, take the valve
back,
>and have the $$ go towards the Stratmosphere.
>
>Steve


> --
> Just installed a -110 Bosch bypass valve in my '93 S4 following the MTM
ECU
> upgrade and the recommended 6-turn wastegate adjustment.  Once the car was
> warmed up, gave it a few hard on/off throttles and seems like most of the
> "honk" was gone with the stock valve -- great!.  Got on the highway and
gave
> it a hard accel when suddenly heard a "pop" followed by hissing and little
> power.  Wow, those stock turbo hoses didn't last long, did they?  Sure
hope
> the Samco GP hoses will be here soon....
>
> And now I have how to go to the S-Fest at Paul K's without my car!?!?
>
> Was surprised to find when I popped the hood that the new Bosch bypass
valve
> "blew its lid", the spring and diaphragm were lying on top of the bottom
> engine cover.  I couldn't believe how poorly the two halves of the plastic
> valve body were attached, very little adhesive..  I'm sure thepartsbin.com
> will do good on them, not so sure I want another one just like it if it's
> from the same production run.  Might run a bead of epoxy at the seal to
> reinforce it, but seems bogus to have to do that to a brand new part.
>
> Anyone else have this happen to them?
>
> I put the original valve back in and I'm back in business.  See you all at
> the S-Fest on Saturday!  Paul, I may pop in on Friday night at 10 or so
and
> have a beer with the earlybirds.
>
> -- Rich A.
>    Vernon, CT (next town over to the UrS4 capital of the Northeast -- home
> of the S-Fest!)