Zero Turbo Boost Follow Up

[John Suter]

Thanks for taking the trouble to answer, Steve.

I suppose when the 1/4" opening connects to a gauge,
no actual "flow" exists as the purpose is to measure
pressure under closed conditions. However, my guess
is when an opening does occur, the outflow could/would
consist of hot gasses, which could be hazardous. My
concern is where any hot gasses are going!!! Perhaps
other members can comment on whether your specific
1/4" tube opening could become hot.

What I do know from personal observation is when a
crack in the manifold occurs (a crack barely wide
enough to insert a fingernail, and about 6 inches
long) it can create a serious firehazard, and has. My
guess is that size crack might permit more to escape
than the 1/4" diameter hole you experienced.

Whatever the circumstances of sudden unexplained
loss of power accompanied by unusual low turbo
pressure readings, Forum members need to seriously
heed the warning to shut off the engine and grab a
fire extinguisher on the way out the door; coaches and
belongings can be replaced, our fine members are
irreplaceable.

John Suter


--- nicodemus815@... wrote:

> >WOW Steve. Do I understand that a 1/4" opening was
> the sole cause of
> virtually all loss of power?
>
>
> I was able to drive at 50MPH on a flat road. I was
> unable to accelerate
> faster though. I was able to stop and start and
> build up momentum, until I reached
> 50+/- MPH again. I'm glad I didn't have to go up a
> mountain though.
>
> The hose appears to go to the dash gauge. I guess
> the 0.25" hole was enough
> to prevent the pressure from building up and forcing
> air in the cylinders. I'm
> thinking I hardly ever got above 15psi of boost, so
> I guess it is conceivable
> that the . 25" hole could leak that much pressure.
> I'll watch the #'s more
> closely on the way home to see what my boost
> pressure is.
>
> What do the experts say......
>
> Steve Harrie
> 8v92 '86PT38
>
>
> [Non-text portions of this message have been
> removed]
>
>


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